Materials Testing Automation

Materials testing automation is specimen handling at a mechanical test frame, often by a robot: loading, aligning and unloading specimens and linking each result to its specimen ID. AMD Machines builds it around the laboratory's frame, which keeps doing the testing and measurement.

Materials testing automation serves university research groups, national laboratories, shared research facilities and industrial materials R&D teams whose staff load specimens into a universal testing machine one at a time, clear fractures and match results to specimen numbers by hand. AMD Machines reviews the frame, grips, extensometer, controller and software, then defines what the automation does and what stays with the test system. A project can start from the test frame's make and model, specimen drawings and an approximate batch size.

AMD Machines designs and builds custom automation and robotic systems: 30+ years in business, 2,500+ machines delivered across North America. Engineering, in-house parts machining and assembly happen at our facilities in Querétaro, Mexico, and sales and service run from our Chicago office. Materials testing is one of the workflows in AMD Machines' laboratory automation and research equipment section.

What does a materials testing automation cell do?

A materials testing automation cell from AMD Machines combines up to seven functions: specimen presentation, identification, dimension measurement, robotic loading and alignment, equipment-status coordination, unloading and sorting, and specimen-to-result association. Which of them a project needs depends on the specimens, the test frame and how the laboratory runs its batches.

• Specimen presentation. Specimens wait in a magazine, tray or carrier that fixes each one's position and orientation; staff fill it outside the safeguarded area, and presence sensors or a camera confirm what was loaded.
• Identification. A barcode or Data Matrix reader confirms the specimen ID, or the tray position stands in for the ID when a specimen cannot be marked.
• Dimension measurement, when the method needs it. Stress values are calculated from the measured cross-section (thickness and width of a flat coupon, diameter of a round specimen), so a measuring station before the test can be part of the scope.
• Robotic loading and alignment. The robot places the specimen in the grips, on compression platens or in a fixture at the position the method requires, and holds it while the grips close.
• Equipment-status coordination. The cell and the test system exchange states such as ready, grips closed, test running, test complete and fault, as far as the interface review confirms the installed controller can report them; the cell's own sensors or an operator step cover the rest.
• Unloading and sorting. After the test, the robot removes the specimen, or both halves of a broken one, to an identified position.
• Specimen-to-result association. The cell joins the result data the test system makes available to the specimen ID confirmed before the test.

Which tasks move to the automation, and which stay with the test frame?

In a materials testing cell from AMD Machines, the automation takes over specimen handling, identification, cell controls and robot safeguarding, while the test system and the laboratory keep the test method, force and strain measurement, calibration and service.

Anything the automation adds that touches the test, such as how the specimen is seated in the grips, an adapter in the load train or an automated cross-section measurement, is reviewed with the laboratory and checked at acceptance against its manual procedure. A change in the load train may call for the owner to re-check alignment (ASTM E1012 covers verification of frame and specimen alignment) and force verification (ASTM E4).

When does automating materials testing make sense for a research laboratory?

Automating materials testing makes sense when specimen handling, not the test itself, limits how many specimens a laboratory can test: batches of similar specimens, short tests and staff hours spent waiting at the frame. One-off tests and method development usually stay manual, and long tests gain less from a robot unless it serves a second frame or carries a batch overnight.

• Test duration against handling time. A robot keeps the frame busy when tests are short compared with loading, measuring and clearing. When a person can prepare the next specimen during a test, robotic loading adds less, and identification and data association may be the better first scope.
• Repeat specimens. Batches of one geometry and one method, typical of high-throughput testing programs, automate well; frequent shape changes mean more gripper and jaw-face changeovers.
• Unattended hours. A full specimen magazine lets a batch continue into the evening or overnight, provided the exception responses are defined and the risk assessment allows unattended running.
• Record keeping. Laboratories that transcribe specimen numbers and results by hand gain from automatic identification even before robotic loading.
• Manual access. A defined manual mode keeps the frame available for one-off and method-development tests.

How does a robot load a tensile test machine?

A robot loads a tensile test machine by placing the specimen between open grips at the position the method requires, holding it while actuated grips close and releasing it without pulling it out of line. Whether a given frame allows that depends on four physical points (grip actuation, specimen shapes, the extensometer and access through the enclosure) and on the signals the installed controller can exchange.

How is grip actuation coordinated with the test machine?

Grip actuation is coordinated by a close command to actuated grips while the robot holds the specimen in position. Which device sends that command (the test system's controller, a separate grip controller or the cell) is settled in the interface review, because gripping pressure is part of the test setup and stays under the laboratory's control.

AMD Machines checks grip actuation first, because it decides whether a robot can load the frame without a person closing the grips. Pneumatic and hydraulic grips, including hydraulic wedge grips, apply gripping force on a command, which is why they are the common choice where throughput matters. Manual wedge grips and hand-tightened screw grips need a person, although some screw grips are driven by an electric motor. When the installed grips are manual, the options are actuated grips, which the laboratory would add to the frame, or keeping grip closing as an operator step.

The aim is the same as in careful manual loading: grip the specimen without bending, pre-stressing or slippage. The review also checks whether the test system can hold near-zero force while the grips close, so closing them does not load the specimen or the robot before the test starts.

Can a robot load both flat coupons and round specimens?

Yes, a robot can load both flat coupons and round specimens when the frame's grips and the robot's gripper are set up for both shapes. Flat (dog-bone) coupons cut from sheet, strip or plate and round machined specimens usually need different jaw faces in the grips and different fingers on the gripper. Round specimens with threaded or button-head ends seat in threaded or shouldered holders rather than wedge jaws, which changes the loading motion and is reviewed separately.

Gripper fingers can be designed to hold both shapes, or a tool changer can swap fingers between batches. A jaw-face change on the frame is usually an operator step, so batches are often grouped by specimen shape, and compression specimens add their own placement on platens or in a fixture. Drawings of every specimen geometry in the test plan let AMD Machines check all of this before the design is fixed.

Can the extensometer be attached automatically during robotic loading?

An extensometer can be attached automatically only if it is designed for it: sensor-arm extensometers come in versions that attach automatically, non-contact video or laser extensometers need no attachment, and clip-on extensometers are designed to be attached to the specimen by hand. Automated specimen loading therefore normally works with one of the first two types, or with test methods that do not call for an extensometer.

Because the extensometer affects the result, AMD Machines' part is limited to reach, clearance and timing around the device the laboratory chooses. A non-contact extensometer also needs a clear line of sight, so the robot and its gripper stay out of its field of view while the test runs.

How does a loading robot reach into a test frame's enclosure?

A loading robot reaches the test space of a materials test frame through an opening in the frame's shields or doors, so AMD Machines reviews those openings, how the doors are opened and interlocked, any environmental chamber or furnace around the specimen, and the clearance to the load cell, grips and extensometer during loading.

The review also settles whether a shield door can stay open through a batch, with the cell's safeguarding around the opening, or must close for each test. A powered, interlocked door on the frame is a change to the test system, which the laboratory specifies with its test-system supplier.

How are test specimens gripped and sorted?

Robotic specimen handling is designed around the specimen, not the robot: AMD Machines reviews the size range, mass, surface condition and any surfaces that must not be touched, then designs the specimen presentation and the gripper around them.

• Gripping. Fingers are shaped for each specimen geometry, with compliance where the specimen must settle into the grips. AMD Machines designs end-of-arm tooling (EOAT) in-house.
• Sorting after the test. Tested specimens can go to positions by test group, condition or retention plan, with both halves of a broken specimen kept together under one ID. After a stopped batch, untested specimens can return to their original positions.

The cell architecture behind robotic loading, including end-of-arm tooling and cell controls, is described on our robotic cells page.

Which signals does the automation exchange with a materials test frame?

A loading cell and a materials test frame exchange a small set of equipment states, and an AMD Machines interface review confirms before design starts which of them the installed controller and software can report and which commands they accept. The cell typically needs to know when:

• the frame is ready for a specimen (crosshead or actuator at the loading position, test space clear, no active fault);
• the grips are open or closed, and which device commands them;
• a test is running, has completed or was stopped;
• the frame is in a safe state for the robot to enter the test space;
• a fault or alarm should pause the batch.

The states travel over whatever the installed controller documents, such as discrete digital inputs and outputs. Where it cannot report a state electronically, the cell can confirm it with its own sensors, or that step stays with an operator. AMD Machines does not assume a signal exists until the documentation for the installed controller and software confirms it.

A status signal is not by itself a safety function. Whether the robot may enter the test space while the crosshead or actuator is powered, and which safety-rated devices or frame interlock inputs that requires, is decided in the risk assessment.

What happens when a specimen breaks or a robotic loading attempt fails?

When a specimen breaks or a loading attempt fails, a materials testing cell follows a response defined in its scope: it stops before the test if loading is uncertain, removes both halves of a broken specimen to that specimen's position, and sends anything unresolved to an exception position for a person to review.

Agreed acceptance testing exercises those responses: at the factory, AMD Machines runs validated sample specimens through the sequence and tests every failure mode we can simulate, and the responses that need the live frame and its grips are proven at site acceptance.

A tensile fracture leaves two halves, sometimes small fragments, and the halves can end up in different places in the test space. Where fracture surfaces will be examined later, the halves are placed so their fracture surfaces are not touched by the gripper, the tray or each other. Whether to retest a specimen that slipped, or one whose test the test system stopped, is the laboratory's decision, not the cell's.

How does a materials testing cell recover from an interrupted batch?

A materials testing cell recovers from an emergency stop, power loss, fault or operator stop by tracking each specimen's state (for example untested, loaded, tested, removed or exception), so an operator can confirm the test space and the specimen states before the batch resumes in the way the scope defines. The scope can also require that nothing is retested or discarded without a person's confirmation, and it sets how a stop is reported when nobody is at the cell: on the HMI, by a stack light and, where agreed, by an alert message.

Can staff still run manual tests on the test frame after automation is added?

Yes, a test frame with robotic specimen loading stays available for one-off and method-development tests through a manual mode defined in the scope: the robot parks clear of the test space, staff test by hand, and the operator confirms the test space and specimen positions before handing the frame back to the cell.

Staff refill magazines from outside the safeguarded area. How the operating mode is selected is set in the scope, and operator training covers these handovers.

Which materials tests can be automated?

Automated tensile testing and automated compression testing of metals at room temperature, on frames configured for automated loading, are the most direct fit for robotic specimen loading: the specimen geometry is defined, the grips or platens can be actuated or reached, and the test ends in a clear state the cell can wait for. Fatigue testing automation and elevated-temperature testing are separate configuration reviews, not options added to a tension cell. The automation does not change the test method, and conformity to a standard stays with the laboratory.

Fatigue testing generally needs grips rated for cyclic loading, and a single fatigue test can run far longer than a tension test, which changes how much a loading robot adds. Elevated-temperature work puts a furnace or chamber around the specimen and needs extensometry suited to temperature; the handling side of hot specimens, furnaces and quench transfer is covered on our heat treatment and furnace automation page. Flexure, impact and tests of non-metallic materials, such as tensile tests of plastics (ASTM D638) or polymer matrix composites (ASTM D3039/D3039M), are reviewed case by case. Laboratories that work to ISO methods review the same points; ISO 6892-1, for example, covers room-temperature tensile testing of metals.

Can you automate around an existing MTS test system?

Often, yes: AMD Machines can automate specimen loading around an existing MTS test system once a review of the installed frame, grips, extensometer, controller and software confirms what a cell can work with. The automation scope is defined around that installed configuration, the same way it is around any other test system.

Robotic specimen loading at a test frame is an established application: MTS states publicly that it has integrated third-party automation systems, including a robotic arm specimen loading system. That public material creates no relationship between MTS and AMD Machines. AMD Machines is not an MTS partner or authorized service provider, and nothing on this page implies MTS approval.

What information does AMD Machines need about an MTS frame, controller and software?

To scope automation around an MTS test system, AMD Machines needs the frame type and model, grip actuation, extensometer type, controller inputs and outputs, software package and version, and the enclosure and safety devices.

Manuals for the installed controller and software, wiring documentation for any auxiliary inputs and outputs, photos of the frame, grips and enclosure, and screenshots of a test method setup help start the review. We do not assume a software programming interface, a remote-start function or a handshake common to every MTS controller; what the installed controller and software offer is confirmed for that version, with the laboratory's test-system supplier where needed.

What stays with the MTS system and its supplier?

The MTS system keeps performing its specified testing and measurement functions: test control, force and strain measurement, data acquisition and the analysis in its software. Changes to the test system itself, such as actuated grips, a different extensometer, added input and output options or frame-side safety devices, are specified by the owner with its test-system or accessory supplier. MTS's public material on its custom static test systems describes, for example, light curtains that can reduce crosshead speed when the beams are broken. A device of that kind belongs to the test system, while the robot cell's safeguarding belongs to the automation.

AMD Machines does not service, repair or calibrate MTS equipment. Calibration of the test system stays with the owner's calibration program, which covers force verification of the frame (ASTM E4) and verification of extensometers (ASTM E83) by the laboratory or a calibration provider, such as one accredited to ISO/IEC 17025; our calibration management guide explains how to build the instrument inventory behind that program.

Can AMD Machines design custom fixtures for MTS test systems?

Yes, as part of an automation scope built around the laboratory's installed frame: specimen nests, magazines, robot-friendly fixtures and adapters for an MTS frame are designed in the same review as the cell. Anything that sits in the load train affects the test, so its design is agreed with the laboratory before it is made. Fixtures, holders and adapters on their own, without a robot cell, are covered on our custom laboratory parts and fixtures page.

How are specimen identities linked to test results?

In a materials testing cell, the specimen ID is read before the test and joined to the result data the test software makes available, so the ID stays with the specimen after a fracture, a stopped batch or a decision to retest. Identity can come from:

• A barcode or 2D Data Matrix code marked on the specimen outside the gauge section, or on its tag or carrier;
• An engraved or printed number read by a camera;
• The specimen's position in an identified tray, when a specimen is too small to mark or a mark could affect the test.

The rule AMD Machines uses on its production test systems carries over: barcode scan, RFID read, or serial number entry before every test. No scan, no test. Where the tray position stands in for the ID, the cell confirms the position and the specimen's presence before loading, so the same rule holds: no confirmed identity, no test. A code that cannot be read sends the specimen to an exception position rather than into the grips.

The cell can record the specimen ID, its tray position and its handling events (for example loaded, tested, removed or exception) and join them to the exported values or result files. Where the test software can accept the specimen ID before each test, the ID travels into the result. Where it cannot, the cell can match each result to the specimen it loaded, one test at a time, so a missing or extra result stops the matching for a person to resolve instead of shifting every later record. Because the interface is confirmed for the installed software version, plan to review a test-software update against it before installing the update.

Records can be passed on through OPC UA, MQTT or direct database writes, or as files in an agreed format where a network connection is not allowed. The connection to the laboratory network, and any IT or cybersecurity approval your institution requires, is agreed in the scope. Linking available instrument data to specimen identity is a defined integration scope. AMD Machines does not supply a LIMS, an electronic laboratory notebook or the analysis of results; the cell hands its records to the system the laboratory already uses.

Marking and mark verification have their own pages: our marking and traceability solutions cover mark verification and traceability, and part marking and traceability systems describes the marking station itself. Camera-based presence checks and code reading are covered under machine vision.

Should a cobot or an industrial robot load a materials test frame?

Either a cobot or an industrial robot can load a materials test frame; the risk assessment decides, because the frame is a hazard in its own right: a moving crosshead or actuator, gripping force, and the energy released when a specimen fractures. AMD Machines integrates FANUC CRX, Universal Robots UR10 and UR20, Yaskawa HC, and Doosan cobots when the floor plan, part weight, and risk assessment support it, and industrial robots from FANUC, ABB, Yaskawa Motoman and KUKA when payload, reach or safeguarding call for them. AMD Machines is a Universal Robots Certified Integrator.

A cobot lets staff work near the cell for some tasks, but it does not make the test space safe to reach into during a test, so that space is safeguarded either way. For the economics of that choice, see our cobot payback period guide.

How is robotic specimen loading safeguarded at a test frame?

Robotic specimen loading is safeguarded on the basis of a risk assessment that covers the robot and the test frame together: the frame keeps its own shields and safety functions, and the automation adds the safeguarding, safety circuits and interlocks the assessment calls for.

AMD Machines engineers its systems to US standards first, with ANSI/RIA R15.06 for robot safety and OSHA 1910 machine guarding requirements, and with ISO 12100 risk assessments and ISO 13849 safety-circuit documentation where your standards require them. We deliver complete safety documentation packages with every system: risk assessments, safety circuit drawings, verification test records, and operator training materials. The US requirements that apply to a laboratory robot, including state-plan and DOE coverage, are summarized under how a laboratory robot is made safe around researchers. Our robot safety standards guide explains risk assessment and collaborative operation in more detail.

What determines the cost and lead time of an automated tensile testing system?

AMD Machines has no standard price for automating a tensile test frame: it prices the automation for an automated tensile testing system, like any other materials testing cell, from its own reviewed scope, and provides a feasibility assessment and budgetary quote, at no cost. The test frame, grips and extensometer come from the laboratory and its test-system supplier.

The main drivers are how many test frames the cell serves, how many specimen geometries it handles, how many specimens the magazines hold for unattended running, whether a dimension-measuring station is included, whether grips or extensometers change, how much exception handling and data integration it needs, and the safeguarding the risk assessment calls for.

AMD Machines delivers simple machines in as little as 6 weeks and complex systems in 24–26 weeks, vs. 40–42 weeks typical for overseas builders. Lead time is set at proposal. Grip or extensometer changes that the laboratory orders from its suppliers follow those suppliers' schedules, so the interface review identifies them early.

Our custom automation lead times guide explains what moves a schedule, and our automation pricing guide gives AMD Machines' published budgetary ranges by system type; those ranges are not a price for a materials testing cell. For a grant or capital request, that budgetary quote can be prepared once the frame, specimens and batch needs are known.

What does a materials testing cell project include?

A materials testing cell project from AMD Machines typically includes tooling and fixtures, cell controls and data, safety engineering, and factory and site acceptance testing; the test system's service and calibration stay with its owner and providers.

• Tooling and fixtures. End-of-arm tooling, specimen magazines, trays and nests, and any adapters the review calls for.
• Controls and data. The cell controller and HMI, the reviewed interface to the test system, specimen identification and the agreed data export. AMD Machines standardizes on Allen-Bradley ControlLogix and CompactLogix platforms for cell-level control, with Rockwell PanelView Plus or FactoryTalk View HMI; the PLC serves as the cell master, coordinating robot motion, safety systems, vision triggers, and I/O. We also work with Omron, Beckhoff, and B&R platforms based on customer requirements or facility standards.
• Safety. Risk assessment, safeguarding, safety circuits and the safety documentation package.
• Acceptance. Every project includes a formal FAT at our facility and SAT at yours, with agreed-upon acceptance criteria documented in the purchase order.

Installation, documentation, training, spare parts, the shared Smartsheet project plan and maintenance and support for the cell follow the standard AMD Machines package described under what AMD Machines delivers on a laboratory automation project.

How is a materials testing cell tested before and after delivery?

A materials testing cell is proven in two stages: a factory acceptance test (FAT) at AMD Machines' facility before shipment, usually without your test frame because it stays in service in your laboratory, and a site acceptance test (SAT) in your laboratory with the frame.

For the general difference, see how factory testing and final onsite integration differ and our guide to how custom automation projects move from concept to commissioning.

How is specimen loading for a test frame different from production testing and CNC machine tending?

Specimen loading for a test frame serves research and materials laboratories: AMD Machines' materials testing automation moves specimens through a mechanical test frame and keeps each result with its specimen ID. Production testing checks manufactured parts, and CNC machine tending loads machine tools; each has its own AMD Machines page, as do furnace and vacuum work:

• Production leak testing, functional testing and end-of-line testing of manufactured parts are covered by our automated test systems and end-of-line test systems.
• Loading and unloading CNC machines is robotic machine tending; the robotic machine tending cells page describes the door, clamp and cycle-complete handshakes that parallel instrument tending.
• Furnace work has its own page: robotic furnace loading, quench transfer and hot specimen handling.
• Loading and controls around vacuum chambers are on our vacuum system automation page.

What should you send to get a quote for robotic specimen loading?

To get a quote for robotic specimen loading, send AMD Machines the test frame's make and model, drawings of each specimen geometry and an approximate batch size. That is enough to start, and AMD Machines provides a feasibility assessment and budgetary quote, at no cost. For a system or integration inquiry, these details let our engineers judge feasibility and scope:

AMD Machines is currently not compliant with the International Traffic in Arms Regulations (ITAR) and cannot accept projects involving ITAR-controlled technical data. Do not send ITAR-controlled technical data by email, through the contact form or as an upload. If a project may be ITAR sensitive, tell us only that, and read our ITAR notice for how AMD Machines responds.

Frequently asked questions

Can you automate our existing materials testing machine?

Yes, AMD Machines can automate an existing materials testing machine when the review shows that its grips, extensometer, test-space access and controller signals allow it; the review covers the same points whatever the make of the frame. When robotic loading is not practical yet, for example with manual grips and a clip-on extensometer, a first scope can still cover specimen identification, dimension measurement and specimen-to-result association, with robotic loading added after a grip or extensometer change.

Can one robot serve two test frames?

Yes, one robot can serve two test frames when both test spaces are within its reach and the risk assessment allows it to work at one frame while the other is testing or in use by hand. A shared robot adds the most on long tests, unloading and reloading one frame while the other runs. The cell tracks each frame's status and specimen separately, with the frame ID in every record. A second frame added later needs reach, floor space and spare inputs and outputs reserved in the first scope.

When should automation be considered for a new test frame?

Automation should be considered before the frame order is placed. Actuated grips, an extensometer that does not need to be attached by hand, the controller's input and output options and access through the enclosure are easier to specify with a new frame than to add later. The laboratory orders them from its test-system supplier, and AMD Machines reviews the proposed configuration for robot access, signals and clearance before the order is fixed.

Can fatigue tests run unattended overnight with robotic loading?

Fatigue tests can sometimes run unattended overnight with robotic loading, after a separate configuration review. They usually run in grips rated for cyclic loading and last far longer than tension tests, so a loading robot mainly saves the handover between tests, such as the change from one specimen to the next overnight. The review also covers specimens that reach the end of a test without failing and whether the risk assessment allows the cell to run unattended.

Can a robot load specimens into a furnace or environmental chamber on a test frame?

A robot can load specimens through the opening of a furnace or environmental chamber on a test frame only where that opening, the grips and the extensometry allow it, and AMD Machines treats it as a separate configuration review, not an option added to a room-temperature cell. The review covers how the chamber or furnace opens and closes, whether the specimen is heated in place, grips and extensometry suited to the temperature, and how a hot specimen, or both hot halves of a broken one, are removed after the test.

How long is the test frame out of service when automation is installed?

A test frame is out of service mainly during installation and the site acceptance test. The frame usually stays in service in the laboratory while AMD Machines designs and builds the cell and runs the factory acceptance test against a simulated test system. The frame is then needed for connection, seating in the installed grips, clearance checks and the live signal exchange; that period, and any grip or extensometer change made at the same time, is set in the project plan.