Motorised force test stands are automatic devices with an electric motor for the controlled application of load in tensile, compression, bending and shear tests. They guarantee a constant, repeatable test speed, customizable load profiles (ramp, cycle, hold), precise stabilisation times, and operator safety through limit sensors and emergency stops. They replace manual stands in every application that requires compliance with strict test standards or the running of many repetitive tests to the same procedure. They are the instrument of choice for industrial quality control, certified laboratories and product R&D.
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Motorised architecture
A modern motorised stand comprises: a rigid mechanical structure (single column, twin column, or gantry for high loads); a brushless servo motor with ball screw or belt drive to move the carriage; a high-resolution encoder for position and speed measurement; a PID controller to regulate speed under load; hardware limit switches and software limits to protect the system; a control display (touchscreen or dedicated keypad); and an optional PC with advanced analysis software. The force gauge or load cell is mounted on the moving carriage or on the fixed end.
Performance
The typical performance of motorised stands is: maximum load from 500 N to 50 kN (medium-capacity stands); useful travel from 500 to 1500 mm; programmable test speed from 0.01 to 1000 mm/min with ±0.5% stability under load; position resolution typically 0.01 mm; safety with automatic stop when the full-scale load or displacement is reached. The more advanced models handle complex test profiles (multiple ramps, fatigue cycles, holding under load for creep studies, relaxation tests) and analysis curves (elastic modulus, yield, energy to break).
Dedicated software
The software that runs a motorised stand makes it possible to: define standardised test programs (for example “tensile test on electrical cable to ISO 6892”); start the test with a single click; acquire the force-displacement curve in real time; automatically calculate the parameters of interest (maximum load, elongation at break, elastic modulus, energy absorbed); generate standardised reports compliant with the standards; archive the data with traceability of specimen, operator and machine; export to universal formats (CSV, Excel, PDF, Q-DAS); and integrate with the company’s LIMS and MES for overall quality management.
Applications
Motorised stands are used for standardised tests on: springs (spring rate checks, load at given positions, fatigue testing); electrical cables (tensile, elongation, insulation strength); crimped terminals (pull testing to IEC 60352); fabrics (tensile and tear strength); rubbers (tensile, compression, Shore hardness with a motorised cell); plastics (three-point bending tests, tensile tests on standardised specimens); elastics and elastic tapes; medical components (syringes, catheters); packaging products (closures, seals, top-load); sports goods; and precision mechanical components.
Selection criteria
The choice of motorised stand depends on the maximum load (to be chosen with a safety margin over the typical tests), the minimum speed required (for slow creep tests), the useful travel, the mechanical stiffness of the structure, the applicable test standards, the availability of suitable control software (some standards require certified software), and the interfaces for integration with LIMS. For multi-product laboratories, modular stands with interchangeable load cells are preferable.
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