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What is Proof Testing and Why Does it Matter?

Proof testing determines that the failure of critical components and parts could result in costly damage to equipment and even injury in severe cases. Our measurement products are designed to be used in proof testing applications.

In proof testing applications, testing and measuring an object’s performance under extremely intense conditions, often above the specified operational use, is critical. This allows testing engineers to ensure the object can handle its rated load and go above and beyond to understand maximum performance and failure.

Interface load cells and data acquisition systems are frequently used for proof testing, which determines the strength and integrity of a test subject by applying a controlled, measured load to it. It is commonly used for general test and measurement applications for stress, fatigue, and materials testing. It is frequently used by industries such as construction, natural resources, infrastructure, heavy machinery, and manufacturing to verify the strong point and durability of objects and structures.

Top Three Reasons Why Proof Testing Matters

#1 Safety: Proof testing qualifies and quantifies the safety of equipment and structures that sustain substantial loads. Identifying weaknesses or defects is preventative, as failure can result in catastrophe. Proof testing for safety is standard for applications that include lifting equipment, rigging gear, structural supports, and components in aircraft or spacecraft.

#2 Quality: Proof testing is common during quality control to verify that equipment or materials meet the required specifications. Whether it is the equipment used in manufacturing equipment or the materials used to construct a building, proof testing is essential in defining and measuring adherence to quality standards.

#3 Reliability: Proof testing provides accurate data on the performance and trustworthiness of the tested objects. By understanding how it reacts under stress, product engineers and testing labs can validate the lifespan of a specific component or product. It is also used to define preventative maintenance requirements. It impacts production lines, product versioning, inspections, and, ultimately, the customer’s user experience.

Proof tests provide vital safety and performance measurements for equipment or structures with significant loads. It helps to prevent accidents, improve reliability, and ensure the quality and integrity of the tested item. Consult Interface Application Engineers to determine the best measurement devices for proof testing.

Proof Testing Using Load Cells

Step One: Load Cell and Set-Up

The starting point is selecting the proper measurement tool, in this case, a load cell. Consider the object’s size, expected load range, and accuracy requirements. Choose a load cell with a capacity slightly exceeding the maximum anticipated load during use.

TIP! Use Interface’s Load Cell Selection Guide

Mount the load cell and object in a stable, controlled environment. Ensure proper alignment and distribution of force on the load cell. Connect the load cell to the data acquisition system with a dedicated readout unit, computer software, or data logger, depending on your needs.

Step Two: Pre-Test and Zeroing

Most test engineers will run a pre-test at low load. This is done by applying a small force and monitoring the readings to ensure everything functions correctly and there are no extraneous signals. Zeroing the load cell to set the baseline measurement without any applied force is important. READ: Why Is Load Cell Zero Balance Important to Accuracy?

Step Three: The Test

When you start the proof test application and data recording, most technicians will increase the load gradually. As defined in a test plan, follow a preset loading schedule, typically in increments, until reaching the desired test load. This could be a static load held for a specific time or a cyclic load simulating real-world conditions. Next, using your load cell measurement instrumentation, monitor the load cell readings, object behavior, and any potential visual deformations throughout the test.

Step Four: Analysis

The proof testing provides data that can be used to analyze the load-displacement curve, identifying any deviations from expected behavior, excessive deflections, or potential failure points. Based on the data, determine if the object met the strength and performance requirements or exhibited any unacceptable flaws. This is why a high-performance, accurate load cell matters in proof testing. It determines the quality of your analysis. As with any testing, it is valuable to maintain records of the test procedure, data, and conclusions for future reference or further analysis. This step is crucial for regulatory and product liability requirements.

The specific requirements and procedures for proof testing will vary depending on the product, equipment, structure, industry standards, and regulations.

Proof Testing Example

The most straightforward solution, where it is necessary to measure the load in a tension cable subject to safety considerations, is to enclose the load cell in a compression cage, which converts tension into compression. The compression cell is trapped between the two plates. Thus, the load cell’s only overload failure mode is in compression, allowing a motion of 0.001″ to 0.010″ before the load cell becomes solid. Even if the load cell is destroyed, the compression cage cannot drop the load unless it fails. Therefore, the cage can be proof-tested with a dummy load cell or an overload-protected cell, and the risk of injury to personnel is avoided.

TIP! This example is detailed in our Interface Load Cell Field Guide. Get your copy here.

The nature of proof testing applications requires a diverse line of performance measurement tools. Interface products extend from overload capabilities for our precision LowProfile load cells to complete DAQ systems. These options provide perfect testing solutions when necessary to push the limits on a product, component, or part.

ADDITIONAL RESOURCES

Enhancing Structural Testing with Multi-Axis Load Cells

Fatigue Testing with Interface Load Cells

Load Cells Built for Stress Testing

Benefits of Proof Loading Verification

Manufacturing: Furniture Fatigue Cycle Testing

Data AQ Pack Guide

Interface Solutions for Consumer Products

Interface New Products Release Winter 2024

Interface proudly presents a selection of new additions to our extensive product catalog designed to elevate your testing and measurement capabilities.

Challenge the limits of force measurement. Interface invites you to explore its Winter 2024 collection, meticulously crafted with testing engineers and technicians in mind. This lineup features pioneering Interface load cells pushing the boundaries of applications, complemented by versatile instrumentation and precision accessories for maximum data fidelity.

Our advanced system offerings and engineer-to-order options offer options for sensors to be tailored to your specific needs. Interface is your partner in precision testing innovation.

NEW INTERFACE PRODUCTS

IF500 LOAD CELL SIMULATOR

The model IF500 instrument is a 5V or 10V excitation-only load cell simulator with a state-of-the-art microprocessor-based design. The instrument excitation supply powers the IF500 and requires no batteries. The IF500-NIST is an added NIST Traceable Calibration Certificate.

Primary IF500 Load Cell Simulator features and benefits:

  • Set “ANY” mV/V value within ±5mV/V
  • State-of-the-art, microprocessor-based design
  • Sleep mode eliminates digital clock noise
  • Powered by instrument excitation supply… No batteries
  • Buffered Ratiometric output
  • 350-ohm bridge configuration
  • Stores up to 10 settings with sequential recall
  • Digital zero trim and storage
  • Low noise, low quiescent current, low-temperature coefficient, high stability amplifiers
  • Compatible with instruments using 5V or 10V excitation, including but not limited to Interface’s instrumentation models 9820, 9840, 9860, 9870, 9890, CSC/CSD, DMA/DMA2, DCA, INF1/INF4, ISG, SGA, and VSC.

ILMP STAINLESS STEEL LOAD MONITORING LOAD PIN

The ILMP Load Pin is machined from high-tensile stainless steel. Our load pins are built to exacting standards and are proof-loaded to 150% of the normal rated load. Interface load measurement pins are versatile and used in various applications, including cranes, winches, hoists, load shackles, and bearing blocks. They are easily installed into machines by replacing any existing load-bearing pin to provide accurate, real-time monitoring of load forces. The load pin can be supplied independently or combined with our extensive range of instrumentation to provide a complete load monitoring system.

Primary ILMP Stainless Steel Load Monitoring Load Pin features and benefits:

  • Capacities range from 1.1K lbf (500 kgs) to 3,307K lbf (1500 MT)
  • Keeper plate supplied
  • Environmentally sealed to IP67
  • Stainless steel construction

Options for engineered-to-order:

  • Integral connector
  • Submersible versions available
  • Integral signal conditioning providing 0-10V, 0-5V, 4-20mA, RS485 outputs
  • Hazardous area certified
  • Special electrical connectors
  • TEDS option

9812-WTS WIRELESS PANEL MOUNT DISPLAY FOR SINGLE TRANSMITTERS

The 9812-WTS Wireless Panel Mount Display For Single Transmitters displays data from any WTS wireless transmitter modules. It is part of the extensive Interface WTS Telemetry System. The data sent by transmitter modules can be utilized by multiple receivers such as displays, handheld readers, analog outputs, relay modules, and computer interfaces. Receivers support standard industrial power supplies and are available in robust IP-rated enclosures with internal antennas optimized to give outstanding coverage.

Primary 9812-WTS Wireless Panel Mount Display features and benefits:

  • Point-to-point connection to a single transmitter
  • Bipolar
  • 6-digit LED display (-199999 to +999999)
  • Four SPST mechanical relay alarms (2A@250VAC)
  • Peak and valley monitoring
  • Wireless communication and compatibility with all WTS products

 3411 INTRINSICALLY SAFE COMPRESSION-ONLY LOWPROFILE® LOAD CELL

The Interface 3411 Intrinsically Safe Compression-Only LowProfile® is a specially designed low-profile load cell with loop-powered intrinsically safe amplified output for use in hazardous locations. These load cells are derived from other proven Interface models by adding high resistance strain gages for low-current loop power and a shielded internal amplifier for extra low emissions and minimal EMI susceptibility.

Primary 3411 LowProfile Load Cell features and benefits:

  • Capacity is 10k lbf
  • Stainless steel construction
  • Sealed connector
  • IP68 environmental protection
  • Internally amplified 4-20 mA output, loop-powered
  • Unipolar compression only
  • The spherical loading surface provides minimal off-axis loading

For more information about this product, acquire a datasheet or a CAD file, and please get in touch with an application engineer.

3450 SEALED COLUMN LOAD CELL WITH INTEGRAL CABLE FOR HAZARDOUS ENVIRONMENTS

The Interface 3450 Sealed Load Cell is an intrinsically safe sealed column-style rod end load cell available in standard 55K lbf. Specially designed low profile load cells with loop-powered intrinsically safe amplified output for use in hazardous locations. These load cells are derived from other proven Interface models by adding high resistance strain gages for low-current loop power and a shielded internal amplifier for extra low emissions and minimal EMI susceptibility.

Primary 3450 Sealed Column Load Cell features and benefits:

  • Tension and compression
  • Environmentally sealed IP65 and IP67
  • Certified for use in hazardous locations when installed per installation instructions
  • 8 ft (2.4 m) standard cable length

For more information about this product, acquire a datasheet or a CAD file, and please get in touch with an application engineer.

NEW PRODUCTS WEBINAR ALERT!

Interface experts Ken Bishop and Brian Peters offer a detailed technical discussion about new products with added use cases and engineering tips for each. This one-hour technical online event highlights the latest product additions in our 35,000+ catalog of force measurement solutions, including load cells, wireless devices, instrumentation, and specialty sensors. MORE INFO.

ADDITIONAL PRODUCT RESOURCES

Be sure to visit our online selection tools to help you choose the best load cells, miniature load cells, multi-axis sensors, torque transducers, accessories, and instrumentation for your specific projects.

Our application engineers, genuine experts in force measurement, are eager to assist. Don’t hesitate to tap into their vast knowledge. They appreciate the opportunity to solve your toughest challenges.

Interface 2023 Most Popular Content

From deep dives into cutting-edge applications using wireless sensor tech to demystifying load cell specifications, the InterfaceIQ blog is a hub of technical exploration, essential 101 guides, and knowledge sharing from Interface measurement experts.

Based on our annual review of popular Interface content, you devoured insights on calibration, enjoyed studying load cell anatomy, and bookmarked crucial tips for mastering force measurement.

Your thirst for engineering insights, testing applications, product use cases, and technical force measurement knowledge fueled our passion for creating insightful content in 2023. As a token of appreciation, we’re showcasing the InterfaceIQ blog posts that resonated most with our product users and followers.

The past year started with High-Temperature Load Cells 101 and ended with Top 10 Trends in Test and Measurement. Our epic rundown of the most-read InterfaceIQ posts of 2023 highlights what happened between these two posts.

Most Read InterfaceIQ Posts of 2023

All-Time Favorite InterfaceIQ Reads in 2023

2023 Most Read Interface 101 Posts

Follow all our 101 posts here.

In addition to our InterfaceIQ posts, we also publish a series of case studies and technical whitepapers.

2023 Most Popular Case Studies

Top 5 Interface Technical White Papers Read in 2023

Looking ahead to 2024, the InterfaceIQ blog schedule promises new content every week. We’re gearing up for even more technical insights, practical tutorials, and thought-provoking discussions that push the boundaries and imagination of test and measurement.

Whether you’re a seasoned engineer writing test protocols for a new product design or a curious mind eager to unravel the mysteries of force measurement, there’s a seat for you at the InterfaceIQ knowledge table. So, why wait? IQ Blog – Subscribe Today

EXTRA, EXTRA! Here are additional places to find Interface blogs about products, applications, technical tips, use cases, and more.

FREE! Interface Load Cell Field Guide – Interface

101 Series – Interface

Technical Library

Case Studies

Application Notes

Guides

ForceLeaders Newsletter

Shunt Calibration for Dummies – a Reference Guide

Force Measurement is Fundamental in Material Testing

Material tests are run to determine the quality, durability, and resistance of materials for parts and products. Selecting the right material is critical to performance of a product, system, or part, especially as it relates to the environmental factors. It is also core for adhering to regulatory standards and compliance requirements.

Whether it is construction and concrete materials, metals, fabrics, biomaterial, plastics, packaging, or some other matter, material testing is fundamental throughout the entire development lifecycle.

Among the various ways to test materials, force measurement is one of the most important. Common uses of force measurement in material tests include applications to measure hardness, torsion, strength, compression, bending, shear, impact, creep, fatigue, and nondestructive capabilities.

The use of load cells provides an adaptable tool that can be utilized for various types of material tests. Using force measurement sensors help to detect changes in load, which is used to determine the flexibility, strength, or weakness of properties in materials. This is critical for research and quality control.

For example, in metal material testing load cells are frequently used for characterizing and assessing the quality of metallic components and structures. Material test engineers use load cells to accurately measure the tensile strength, compression resistance, and yield properties of metal samples. By subjecting metals to controlled loads and monitoring the metals deformation during tests, Interface load cells provide critical data that informs engineering decisions and quality control processes. Material tests confirm that the metals chosen for products like aircraft structures, automotive components, and sports equipment, meet stringent performance standards. The measurement sensors are also vital for determining the reliability, longevity and safety of metal materials used for any product or part. See other examples of testing in our new Interface T&M Material Testing Overview.

It is the responsibility of a material testing engineer to determine the resilience, safety, and value of materials through mechanical testing, of which material testing is one of the five categories. Ultimately, product designers and original equipment manufacturers (OEMs) rely upon material testing data to ensure their products can withstand the anticipated levels of force during use. They also need to know if the material will stretch or elongate, as well as pinpoint its exact breaking point.

Interface’s robust line of load cells, multi-axis sensors, and data acquisition systems are used for material testing. It is common to have our 1200 LowProfile load cells installed into material testing machines at test labs and onsite. We also supply a variety of miniature load cells and load pins for material testing, depending on the type of equipment and environment used for tests.

High accuracy load cells are essential in material testing due to their precision, versatility, and ability to provide real-time data, which helps researchers and engineers gain a better understanding of a material’s mechanical properties and behavior under different conditions.

If force must be measured, Interface has a solution. This applies to testing materials used for infrastructure, medical devices, aircraft, rockets, vehicles, robotics and consumer goods. As new materials and composites are introduced in revolutionary ways for use in construction, designing light weight products using polymers, and 3D printed components, it is imperative that material tests validate the use case based on high accuracy measurements.

Our force measurement products are being used to gather data from testing materials in applications used for machines, equipment, structures, packaging and more. Here are a few examples of material testing applications.

Inflatable Space Habitat

Inflatable habitats are the newest innovation in the space industry, creating a new interplanetary dwelling for humans to live and work past the Earth’s atmosphere. An innovative space industry company wanted to test the overall design and material of their inflatable habitats by conducting a burst test. Multiple clevises and LP Stainless Steel Load Pins were attached to the in the webbing material that create the inflatable habitat. When pressure was increased within the inflatable habitat, the load pins captured how much force the heavy duty material will hold at specific pressures until it explodes. Interface’s LP Stainless Steel Load Pins successfully measured the amount of force the inflatable habitat could withstand during the burst test.

Material Tensile Testing Load Frame

A customer wanted to conduct a tensile force test on different samples and materials until failure. Materials include plastic, steel, or woven fabric. They wanted to measure tensile strength, yield strength, and yield stress. Interface’s 1200 Standard Precision LowProfile™ Load Cell was installed into the customer’s test frame. The tensile test was conducted, and force results were captured by the load cell and extensometer were synced through the SI-USB4 4 Channel USB Interface Module. These results were then displayed on the customer’s PC with supplied software. With Interface’s force products, the customer was able to determine the tensile strength, yield strength, and yield stress of a variety of different materials.

Material testing is often the first step in any new product development process. With Interface force measurement solutions, our customers can expect industry-leading accuracy, quality and reliability in testing the materials that will go into their next project. Contact us for products used for various test types.

Interface Solutions for Material Testing Engineers

Tensile Testing for 3D Materials

Bending Beam Load Cell Basics

The Aviation Industry Soars Using Interface Solutions

Interface Solutions for Structural Testing

Interface Solutions Aid Pharmaceutical Industry

Force Measurement Testing Improves Products and Consumer Safety

Across every industry, force measurement solutions are utilized to improve product performance, safety and quality. Sensor technologies are used every day to test various consumer products’ weight, torsion, tension, compression, fatigue, impact, and materials.

Force measurement testing is used throughout the product development lifecycle, from concept and R&D, through engineering and testing, to manufacturing and distribution, leading to eventual utilization. Interface load cells are commonly integrated into actual consumer products for activation and to measure performance during use.

Interface force measurement solutions are also used in the testing of equipment, machines, and tools used in the production of all types of products and goods. Our products are used in industrial automation robotic arms as well as within lifting equipment deployed to move materials around a facility.

The key to all force measurement testing is accuracy and reliability of data, as well as selecting the right type of force sensor for the specific product being testing.

Types of Product Testing Applications Using Interface Measurement Solutions

  • Weighing Applications: Interface miniature load cells are often for product testing to measure the exact weight of consumer products, such as food, beverages, and electronics. This information is critical R&D, as well on the production line and to meet the exact product specifications. Our load cells help to ensure that the products are not underweight or overweight, and comply with regulations. Read more about Load Cells for Smarter and More Efficient Weighing
  • Material Applications: Interface LowProfile load cells are often found in product testing labs to assess the strength of materials used in consumer products such as plastics, metals, and mixtures of composites. The measurements gathered during the product testing safeguards consumers and confirms the product’s durability. Read Interface Solutions for Material Testing Engineers
  • Force Applications: Interface load cells, torque transducers, and instrumentation are used in complete test systems that examine the usability of products such as exercise equipment, appliances and electronics. The data acquired in shear, tensile and force testing is important to understand if the product meets design specifications, is easy to use and does not require excessive force to work.
  • Safety Applications: One of the most important product use cases for Interface measurement solutions is to test the safety of products such as furniture, toys and automobile features. It is a requirement for every maker of products that are not hazardous and will not cause injury to consumers. Read Interface Solutions for Safety and Regulation Testing and Monitoring

To give you a better idea of how our load cells and instrumentation are utilized in distinct types of product tests, we have included a few application notes below outlining real-world examples of force testing projects.

Bicycle Helmet Safety and Impact Product Testing

A high production bicycle manufacturing facility set up a product testing lab to measure the impact of the safety of their helmets when dropped from different heights onto a flat surface such as an anvil. This test is necessary to ensure consumer safety and that the products are made with the highest quality materials to protect the rider. Interface suggests installing the 1101 Compression-Only Ultra Precision LowProfile® Load Cellat the bottom of an anvil. The bike helmet is then dropped from multiple heights and at multiple angles onto the anvil. The measurements from impact are then recorded and logged throughout the product testing using Interface’s INF-USB3 Universal Serial Bus Single Channel PC Interface Module with supplied software. Every design or material change runs through the same rigorous testing protocols using these high accuracy measurement solutions.  Read CPG Bike Helmet Impact Test

Product Weighing of Consumer Water Bottles

A manufacturer of glass bottled water needs to dispense the exact amount of fluid into each bottle and then weigh the water bottle to ensure it is at the labeled weight on the product packaging. The product testing of the manufacturing equipment is used to minimize waste and to meet the weight requirements to ensure consumer satisfaction. Interface suggests using the MBP Miniature Beam Load Cell and attaching it under a plate or platform where the water bottle is placed on while it is being filled with fluids. The force weight is measured by the MBP Miniature Beam Load Cell and connected to the 9870 High Speed High Performance TEDS Ready Indicator where results are captured, displayed, and logged for quality control. Read CPG Water Bottle Dispensing and Weighing

Product Test Lab Conducts High Volume Tensile Force Testing

A product test lab is constantly requested to conduct a series of tensile force tests on different samples and materials until failure. These materials include plastic, steel, or woven fabric, and are utilized in the design and manufacturing of several consumer products. The lab professionals want to measure tensile strength, yield strength, and yield stress for every submitted product material sample. For the tensile test stand, we recommend using Interface’s 1200 Standard Precision LowProfile™ Load Cell be installed into the test frame. As the tensile test is conducted, force results captured by the load cell and extensometer are synchronized through the SI-USB4 4 Channel USB Interface Module. The results are displayed on the customer’s computer with supplied software. Learn more by reading Material Tensile Testing.

Interface’s high precision force sensor technologies used in robotics have revolutionized the manufacturing of consumer products. With automated assembly lines and robotic arms taking charge, these machines work efficiently to mass-produce consumer goods. Quality control of all the products we provide you for testing is one of the main focuses of Interface, as we want to keep your customers happy and safe.

Interface’s experienced team are renowned specialists in force, torque and weight measurement manufacturing and technology. Our depth of knowledge and wide range of capabilities create custom solutions of all types, whether special transducers made to your exact specifications or complete customized sensor, instrumentation, and software systems. We collaborate with you to ensure the product specifications you need are designed to match your precise requirements.

ADDITIONAL RESOURCES

Introducing the Interface Consumer Product Testing Case Study

Interface Solutions for Consumer Products

Force Measurement is Reducing Waste and Automating the Consumer Packaging Industry

Applications for Consumer Products and Packaging

Load Cells for Consumer Product Applications

Why Product Design Houses Choose Interface

Testing Labs Choose Interface High Accuracy Products

Interface Solutions for Material Testing Engineers

Why Product Design Houses Choose Interface

When people think of force measurement, they often think that it is a tool for testing products. However, load cells, torque transducers and multi-axis sensors also play a fundamental role throughout the entire product design process. In fact, many products today actually design force sensors directly into products.

Product design houses are companies that fulfill outsourced design work for a variety of industries. These specialized design houses are contracted to develop and bring products to life.

A product design house primarily focuses on designing physical products or tangible goods. The services they offer to product makers, engineers, manufacturers, and innovators typically involve the entire product development lifecycle, from conceptualization and design to prototyping and manufacturing.

Due to our experience and expertise across multiple industries, Interface collaborates with product design houses in identifying the right sensors and systems to use during different stages of the design process. Whether it is for accurately measuring forces for impact and fatigue testing, identifying precise weights for packaging, modeling consumer usability, or testing material strength, Interface products are chosen by design houses based on their range of capabilities, accuracy, versatility and quality.

How Product Design Houses Use Interface Products

  • Concept Development and Prototyping: Product design houses often use Interface product design files when refining their initial product ideas or creating new concepts. When the products move into physical modeling, Interface products are used for testing and validation at this early stage.
  • Industrial Design: Industrial designers use Interface load cells and other sensor products for measuring functionality of the product.
  • Design Validation and Testing: Conducting tests and simulations to validate the product’s performance, durability, and safety are the number one reason why design houses utilize Interface measurement solutions. Design houses put sensor technologies into products to provide force data for user feedback, to optimize performance, safeguard consumers and activate components.
  • Mechanical Engineering: The mechanical engineering team of a design house will connect with Interface when they are working on the technical phases of product design. Our products are used to help ensure the final product can be fabricated efficiently, performs consistently, and meets applicable safety standards.
  • Materials and Manufacturing: Experts at design houses that are versed in materials science and manufacturing processes will consult with Interface in finding measurement solutions that can access and validate material testing and production systems. Within the manufacturing realm, these devices are employed in quality control processes to ensure consistent product standards.
  • Packaging: If a product has packaging that must meet durability, temperature, pressure or fatigue requirements, Interface will provide sensors and instrumentation for design testing.
  • Regulatory Compliance and Certification Support: For products subject to regulatory standards, design houses utilize high accuracy measurement solutions in creating specifications, reporting, and compliance requirements before moving to market.

These services can vary from one product design house to another, and some design houses may specialize in specific industries or types of products.

Product design houses leverage Interface load cells across various industries to measure and monitor forces and weights with precision. For example, in medical device development, Interface miniature load cells are used for patient lifts, ensuring secure and accurate weight measurements.

Whether used in material testing, robotics, or agricultural machinery, load cells enable product design houses to create innovative solutions tailored to specific industry requirements, enhancing overall product performance and reliability. Here are a few examples of house product designers use force measurement solutions during the design phase.

Furniture Fatigue Cycle Testing

To meet safety protocols in relation to the manufacturing of various furniture products, fatigue testing, shock testing, and proof testing must be rigorously performed before diffusion into the marketplace, and into the homes of consumers. Force testing of furniture products is critical in determining the posted max loads to protect manufacturers from liability due to damage that might result from the misuse of those products and overloading. Using Interface’s SSMF Fatigue Rated S-Type Load Cell along with Interface’s 9890 Strain Gage, Load Cell, & mV/V Indicator provided a solution that measures the force being applied in fatigue cycle testing of a furniture product, in this case, testing the rocking mechanism in an office chair. Throughout the testing phase, changes were made to the design to improve the safety and life of the furniture, ensuring product quality and protecting the manufacturer from future liability.

Self-Checkout Kiosk Functional Testing

To assess the design of self-checkout kiosks, part of the development cycle is to ensure the weighing feature is functioning properly with the right amount of sensitivity when customers want to weigh products like fruits or vegetables. The designers also needed a system that measures the force it takes for the self-checkout kiosk to activate a response for consumers. Interface suggested installing SSB Load Beam Load Cells under the plate where items are weighed. When connected to the WTS-AM-1E Wireless Strain Bridge Transmitter Module, force results are wirelessly transmitted to the WTS-BS-6 Wireless Telemetry Dongle Base Station on the customer’s PC. Data can be logged and graphed with included Log100 software. Interface’s wireless force system successfully measured the amount of force it took for the self-checkout kiosk to react and ensure it is functioning properly.

 

Design of a Prosthetic Foot

In the design of this medical device, the product designers need to know how the foot responds as it is loaded during different stances. To measure this, Interface’s 3A120 3-Axis Load Cell was installed between the leg socket and the prosthetic foot. The 3A120 was then connected to the BSC4D Multi-Channel Bridge Amplifier and Computer Interface Module. Using this solution, data was logged for X, Y, and Z axis. The design house was able to review the results and identify premature flat foot and dead spots during foot’s production for consumer use. They utilized this vital information to make improvements to the design.

Interface works with design houses and product design engineers across the continuum of a product’s development through go-to-market. We supply standard measurement sensors like our load cells, along with custom solutions that are uniquely engineered for a particular use case.

ADDITIONAL RESOURCES

Why Product Design Engineers Choose Interface

Interface Solutions for Consumer Products

Introducing the Interface Consumer Product Testing Case Study

Interface Mini Load Cells Growing in Product Use and Testing

Center of Gravity Testing in Robotics Demands Precision Load Cells

As the use of robotics expands across industries and the types of robotic motions grow in complexity, advanced testing using quality measurement solutions is essential. Contact momentum and gross measurements of indicators are not enough for sophisticated robotics. With the requirements for robots and cobots to have fluid and inertial movement capabilities, control and feedback demand maximized feedback and resolution.

Related to the testing of inertia, load shifting, and interaction, is defining the center of gravity for robots’ actions and applications. The center of gravity (CoG) of a robotic system is a critical factor in its stability and performance.

The CoG is the point at which the entire weight of the system is evenly distributed. If the CoG is not properly located, the system may be unstable and prone to tipping over, which could damage the robot.

For any robotic application that deploys advanced mobility features, the center of gravity can affect the way the system moves. It can also impact the exactness of its movements. Thus, it is essential to use measurement solutions that are highly precise. See: Advancements in Robotics and Cobots Using Interface Sensors.

Why Robotic Engineers Care About CoG Testing

  • Stability: The CoG is a major factor in determining the stability of a robot. If the CoG is not properly located, the robot may be unstable and prone to tipping over. This can be a safety hazard, and it can also damage the robot. It is an expensive mistake to not have stability proven before moving forward with the design.
  • Performance: The CoG can also affect the performance of a robot. If the CoG is located too high, the robot may be less maneuverable. If the CoG is located too low, the robot may be less stable. By optimizing the CoG, robotic engineers can improve the performance of the robot and use for actions that rely on exact movement.
  • Safety: In some industries, such as manufacturing, medical and aerospace, there are safety regulations that require robots to have a certain CoG. For example, in the automotive industry, robots that are used to weld cars must have a CoG that is below a certain point. By testing the CoG of their robots, robotic engineers can ensure that they are meeting safety regulations.

There are different methods for determining the CoG of a robotic system. One common method is to use strain gage load cells. Not all load cells are designed for precision measurement. Interface specializes in precision. Center of gravity testing demands strict measurement. For example, Interface compression load cells are often used in center of gravity testing for robotics because they are very accurate and can measure remarkably small forces.

Interface load cells measure force, and they can be used to determine the weight of a system at different points. By measuring the weight of a system at different points, it is possible to calculate the location of the CoG.

Interface load cells used for center of gravity testing are typically in our miniature load cell line, due to the size of the installation and testing environment. Miniature load cells are easily embedded into robotics, as well as can be used for continuous monitoring.

Surgical Robotic Haptic Force and CoG

Robots used for surgery often utilize haptic force feedback for ensuring that the surgeon does not apply too much force, creating harm or greater impact on the patient. Haptic is the use of force, vibration, or other tactile stimuli to create the sensation of touch. In the context of invasive surgery, haptic force feedback from robotics is used to provide the surgeon with feedback about the forces they are applying to the patient’s tissue. CoG testing can help to prevent the robotic arm from tipping over during surgery.

CoG testing is important for haptic force feedback in invasive surgery because it ensures that the robotic arm is stable and does not tip over during surgery. The CoG is the point at which the entire weight of the robotic arm is evenly distributed. If the CoG is not properly located, the robotic arm may be unstable and prone to tipping over. This can be a safety hazard for the surgeon and the patient.

CoG testing is also used to optimize the design of the robotic arm for haptic force feedback. CoG testing using precision load cells can verify the performance of the robotic arm in haptic force feedback applications. After the robotic arm has been designed and optimized, CoG can ensure that the robotic arm is able to provide the surgeon with the feedback they need to perform surgery safely and accurately.

Robotic Center of Gravity on Production Line

A company is developing a new robotic arm that will be used to simulate human behavior on a manufacturing product line. The robotic arm will be used to pick and place products, and it is important that the arm is stable and does not tip over. To ensure the stability of the robotic arm, the company needs to determine the CoG of the arm. The load cell is placed on the arm, and the arm will be moved through a range of motions. The data from the load cell will be used to calculate the CoG of the arm.

CoG Testing and Multi-Axis Sensors

Multi-axis load cells are growing in use for robotics testing to provide data across 2, 3 or 6 axes at any given time. These high functioning sensors are ideal for robotic tests where there are simulations of human behaviors. This is detailed in Using Multi-Axis Sensors to Bring Robotics to Life.

To perform CoG testing using precision load cells, a robotic system can be placed on a platform that is supported by the load cells. We call these force plates. The load cells measure the weight of the system at different points, and the data is then used to calculate the location of the CoG. Visit our 6-Axis Force Plate Robotic Arm application note to learn more about force plates and multi-axis sensors.


Benefits Of Using Precision Load Cells for CoG Testing:

  • Interface precision load cells provide advanced sensors functional beyond contact and simple indicator measurement, to maximize robotic feedback and optimize performance.
  • Interface precision load cells can provide accurate measurements of the weight of a robotic system at different points.
  • Interface precision load cells are repeatable and dependable, which means that the results of CoG testing are consistent when testing robots and cobots.
  • Interface precision load cells are easy to use, which makes them a practical option for CoG testing and integration into the actual robot.

There are several benefits to using an Interface Mini Load Cells, like our ConvexBT Load Button Load Cell or MBI Overload Protected Miniature Beam Load Cell for high accuracy CoG testing.

First, the miniature load cell is small and lightweight, which makes it easy to attach to the robotic arm. Second, the load cell is designed for precision measurement, which ensures that the CoG of the arm is accurately determined. Third, the quality of Interface precision load cells provides repeatable and dependable measurement, which means that the results of CoG testing are consistent.

Using a miniature load cell of high accuracy is a valuable way to test the CoG of a robot used to simulate human behavior on a product line. This ensures that the robot is stable and does not tip over, which is critical for safety and efficiency.

In addition to testing the CoG of a robotic arm, other tests for these types of robotics include the weight of the arm, the distribution of the weight of the arm, and the friction between the arm and the surface it is moving on. By considering these factors, it is possible to accurately determine the CoG of a robotic arm and ensure that it is stable and safe to operate.

There are many factors that can affect the accuracy of CoG testing using load cells, including the design, capacity and range of measurement of the load cells, the stability of the platform, and the distribution of the weight of the system.

CoG testing is an important part of the design and development of robotic systems. By determining the CoG of a system, it is possible to improve its stability and performance. If you are interested in learning more about CoG testing using Interface precision load cells, please contact us.

ADDITIONAL RESOURCES

Types of Robots Using Interface Sensors

Robotic Grinding and Polishing

Collaborative Robots Using Interface Sensors

Advancements in Robotics and Cobots Using Interface Sensors

Using Multi-Axis Sensors to Bring Robotics to Life

Robotic Surgery Force Feedback

IoT Industrial Robotic Arm App Note

Force Measurement Solutions for Advanced Manufacturing Robotics

Reduced Gravity Simulation

Tank Weighing and Center of Gravity App Note

 

Automation-and-Robotics-Case-Study

Interface Fall 2022 Customer Survey Results

Interface recently conducted our semi-annual customer survey. We appreciate everyone that took time to share their experience based on collaborating with us over the past year. We prioritize all the individual and collective input and share all feedback and results across our entire company. Customer experience is a top initiative at Interface, and direct feedback is a critical measure of how we are doing to meet and hopefully exceed expectations.

We asked six questions in the latest survey to gather valuable insight and feedback about products, vendor selection, lead times and overall satisfaction. For four years, we have asked the most popular and standard question that measures customer satisfaction and reliability across all industries, “How likely are you to refer Interface to a friend or colleague.

The importance of this question is to measure consistency. The responses to this question tell us how we are performing based on customer loyalty and brand recognition. The results of how people answer this question produce what is known as a Net Promoter Score (NPS). For this past survey, this question resulted in a +52 NPS. We are incredibly pleased to learn that the majority of respondents did select 10, on a scale of 0-10. We value the confidence.

Our trend for the past eight NPS surveys tells us that we are consistent in how we are operating as a company based on the feedback from our customers. Interface remains in the higher rankings of a NPS, where top performing companies are above +30. Most respondents also selected they were “exceedingly satisfied” with Interface when we asked, “How satisfied are you with Interface and your customer experience? to measure overall customer satisfaction. What we also learn in every survey that is there is always room to improve. As a customer-centric company, we are equally focused on being quality-driven as a precision manufacturer of force measurement solutions on which you can depend for accuracy and quality.

We also asked a question related to lead times on products. We learned that the faster we can deliver the products you need, the better. This is helpful as we plan our production for 2023 and beyond. We’ve been manufacturing more of our standard load cell product inventory for availability in our QuickShip48 program. The QS48 program is an online ordering program that guarantees delivery within 48 business hours. We are continually growing stock of these products that do not require any customization. Be sure to check out the QS48 products available here.

Our team also asked the Fall 2022 Customer Satisfaction Survey respondents to tell us what criteria they use for selecting a force measurement product and service company. We asked, “What factors help you decide to continue using Interface as a supplier of force measurement solutions? Here are the top five selected category responses:

  • #1 – Quality of Products
  • #2 – Accuracy Specifications of Measurement Devices
  • #3 – Past Buying Experiences (Relationship)
  • #4 – Services
  • #5 – Breadth of Product Offering

The other selections included: Customization and Modification of Products, Convenience, Lead Times, Product Fit and Test & Measurement Expertise.

Customer experience matters to us. We do value all the input and will use this direct feedback to measure how we do in growing your loyalty and satisfaction in 2023 and beyond.

Top Interface Products in 2021

What Interface products were test and measurement professionals favorites this year? The 2021 product that took the number one spot of most interest was our blue load cell. The reliable and trusted Interface LowProfile Load Cells have been a staple in the T&M industry for more than fifty years. The top choice of Interface customers in 2021 is the 1200 Standard Precision LowProfile, in both high and low capacities.

The category of products Interface offers has increased significantly as we drive toward helping our customers with complete force and torque solutions. The count of Interface products, in all their configurations and capacities, is well over 30,000. This does not include engineered-to-order or custom solutions, specialties that Interface offers to meet the exact requirements of our customers.

We expanded our line of offerings dramatically in 2021 with wireless solutions, instrumentation, miniature load cells, along with new digital products like the BX6 and expanding our BX8 to match the expanding interest in our growing multi-axis sensors line of 3 and 6-Axis Load Cells. Our new 2021 Catalog provides you a glimpse of what you have available from Interface.

Even with the all-time favorite Interface load cells remaining as the #1 product category in 2021, winning by a large margin with the most interest, there are many product families taking a run for a top position, including instrumentation, minis load cells, and multi-axis sensors.

TOP 10 PRODUCT CATEGORIES FROM INTERFACE IN 2021

  1. Load Cells
  2. Torque Transducers
  3. Instrumentation
  4. Multi-Axis Sensors
  5. Mini Load Cells
  6. Digital Instrumentation
  7. Accessories
  8. Calibration Systems
  9. Load Pins
  10. Wireless Telemetry Systems

You can read our latest review of the WTS system and why it is growing in popularity.

TOP 10 INTERFACE PRODUCTS IN 2021

Diving into the numbers, here are the top 10 product models that gained the most interest this year:

  1. 1200 Standard Precision LowProfile® Load Cell
  2. 1000 Fatigue-Rated LowProfile® Load Cell
  3. SSM or SSM2 Sealed S-Type Mini Load Cell
  4. 3-Axis Force Multi-Axis Load Cell
  5. SGA AC/DC POWERED SIGNAL CONDITIONER
  6. WMC Sealed Stainless Steel Miniature Load Cell
  7. SMS-Type Load Cell
  8. 1100 Ultra Precision LowProfile® Load Cell
  9. 6-Axis Standard Capacity Load Cells
  10. 1600 Gold Standard® Calibration LowProfile® Load Cell

In the runner-up category, the products that made the second half of our top 20 list include the LBM Load Button Load Cell, 9840 Multi-Channel Indicator, Calibration Systems, Torque Transducer Models T2 and T4, Model 1500Low-Capacity Load Cell, SML Low Height Mini, 9320 Portable Indicator, 2400 Standard Stainless Steel Load Cell and our famous MB Miniature Beam Load Cell.  With such a large catalog, it’s quite a distinction to get to the top 20.

We are excited to learn what products will get your attention in the new year. Of course, we appreciate your interest!

If you have questions about any of our product categories or specific models, you can always contact our application engineers, representatives and distributors around the globe. We are here to make your 2022 a great success!