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2011 MICROTEST Electromechanical Materials Testing Machines EM2 MICROTEST

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Electromechanical Materials Testing Machines EM2 series

MICROTEST

MICROTEST, S.A. Instruments and Equipments for Materials Testing (+34) 91 796 33 32 www.microtest-sa.com

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Electromechanical Materials Testing Machines EM2 MICROTEST

MICROTEST EM2/FR electromechanical testing machines are designed to test a large range of materials, including: rigid and reinforced plastics, composites, c e r a mi c s , geo-textiles, concrete, rocks, mortars, wood, sheet metal, welded specimens, rubbers, adhesives, and medical products and components, in tension, compression, flexure, shear, tear and peel. They are widely used in R&D Centers, Industry, Testing Laboratories, Education centers, and for calibration purposes in Force Calibration Laboratories. They are built in capacities ranging from 10kN to 500kN, both tension and compression. Under demand they can

also be made in lower and bigger capacities. In MICROTEST EM2 machines the load is applied by means of a double screw driven system in a dual column frame. The construction of the machine load frame, with a double guiding columns and pre-loaded leadscrews, make these frames have excellent rigidity with negligible frame deflection. This design allows for a single test zone for both tension and compression tests. Users can load heavy specimens with minimal effort. This feature is further enhanced by a programmable switch mechanism that allows the operator to quickly set upper and lower crosshead

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Electromechanical Materials Testing Machines EM2 MICROTEST limits at any point within the frame’s clearance. The crosshead is actuated by the screw driven system and guided by two robust lateral columns. The vertical crosshead travel is determined for the length of the screws and can be modified under demand. This electromechanical system is a double effect one and is driven by a DC electric motor

(or a brushless motor) and includes an optical encoder for a continuous measuring of the crosshead position that allows also the control of the test speed. Inside the lower frame there is a transmission system transmitting the mechanical power to the screws, usually including a heavy duty gearbox and a pulley system.

The main advantages of electromechanical testing machines over the hydraulic systems are:  High stability, mainly at low speed or long term tests (corrosion under tension tests, creep tests, etc.).  Capability of keeping the load during long intervals, with error under 0.1% of the applied force, or even better (< 0,01%) in the case of calibration by comparison force standard machines or high stability of load tests .  Electromechanical machines can be operated at speeds ranging from a minimum of 0.001mm to a maximum of 200 or 500 mm/min (or even 1000mm/min, depending on the model), which accommodates a wide range of materials and specimens.  Minimum maintenance: They do not need oil, filter or joints replacement.  They do not need extra space for hydraulic power source and they do not need any pipe or external fittings to transmit the mechanical power.  Very low noise in comparison with hydraulic systems and without the risk of leakage of oil.  Low consumption of energy and no need of expensive cooling systems.

Moreover, the displacement of the crosshead allows the application of the load without impact, in a continuous way, disregarding the state of cleanliness of electro-valves or servo-valves needed in hydraulic systems. MICROTEST EM2/FR machines have ever shown a very good behavior in long term tests, where it is necessary to keep the load or the position during long time at a high level of stability.

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Electromechanical Materials Testing Machines EM2 MICROTEST

The electromechanical testing machines include one or more force transducers (load cell) that provide better precision measurement of the applied force than pressure transducers or gages used in traditional hydraulic systems. In this way the force measurement is not affected by oil temperature, local disturbances

caused by the oil flow, friction in the load cylinder, etc. The test speed is digitally controlled and measured by means of an incremental optical encoder placed in the motor axis, obtaining a high precision controlled movement, helped by the high gear ratio of the system.

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Electromechanical Materials Testing Machines EM2 MICROTEST

The EM2 machines flexibility is further extended by a wide array of accessories instrumentation, grips and fixtures to perform all kind of test with the higher efficiency. These accessories include various LVDT extensometers, compressometers, strain gage

extensometers, high temperature extensometers, as well as grips, holders, jigs or platens for holding the test specimens. They can also be delivered with special testing equipment as high temperature furnaces, climatic chambers, etc.

MICROTEST can provide a great variety of grips and accessories, depending on the material or test. Among others:     

Compression platens. Pneumatic or manual grips for tensile tests with different jaws. Bend fixtures. Other test fixtures (shear, friction, tear, peel, etc) Extensometers, furnaces, climatic chambers, etc.

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Electromechanical Materials Testing Machines EM2 MICROTEST

This flexibility makes EM2 machines very suitable in most of the standardized axial tests, where the force to be applied is under the load capacity of the machine, in tensile test or compression tests in the same single test zone. Among others, with the suitable fixture, the following tests can be done:           

Tensile tests on metal samples: standard shapes, ribbons, springs, screws, fasteners, washers, wires, cables, elastomeric samples, etc High temperature creep tests Corrosion under tension tests. Tensile tests on polymers, composites, rubbers, textiles, ropes, webs, wood, etc. Tensile tests on standardized steel samples. Tensile, shear or bending tests on aluminium samples or profiles. Compression tests on concrete, mortars, ceramics, foams, wood, rocks, etc. Friction tests, peel tests. Shear, etc. Bending tests on mortars, concrete, ceramics, wood, paving tiles, etc. CBR and Marshall test. Calibration of force transducers (EN ISO 376).

Do not hesitate to contact us to consult any need about your tests.

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Electromechanical Materials Testing Machines EM2 MICROTEST

DESCRIPTION

LOWER CHASSIS It contains the electromechanical driving system, composed by: motor, gearbox, pulleys, ball screws, bearings, etc. and electric elements to control the machine. Over this lower structure the load frame stands. The base plate of the frame can have threaded holes, linear guides, holders or attachments when they have to be used with climatic chambers, furnaces, etc. The dimensions of this chassis can be modified under demand to change the height of the test zone, for example. LOAD FRAME The load frame has a high stiffness, with two columns in chrome steel and double ball screw. The crosshead usually has the load cell for measuring the force during the tests. Several load cells in different lower capacities can be added with the suitable coupling elements. ELECTROMECHANICAL ACTUATOR SYSTEM This electromechanical system is a double effect one and is driven by a DC electric motor (or a brushless motor) and includes an optical encoder for a continuous measuring of the crosshead position that allows also the control of the test speed. The maximum speed and travel will depend on the screw, motor and gearbox used. Under demand, different solutions can be adopted to have other values for speed or crosshead travel.

The crosshead has also the nuts and bearing units to allow the soft movement of the crosshead when the screws are actuated by the driving system. The dimensions of the load frame can be modified under demand to change the height or the width in the test zone, for example.

To make possible an easy collocation of the samples, the machine has a manual control for the crosshead in the front panel of the machine that allows the changing of the test zone height. The speed of this movement is selectable by the SCM3000 software.

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Electromechanical Materials Testing Machines EM2 MICROTEST SAFETY SHIELD AND PROTECTIVE ELEMENTS Every standard EM2 machine includes a and electronic limits features (including protective shield at the front side of the emergency button) supplied to prevent load frame. This shield is made on a high movement of the actuator beyond resistance and transparent polycarbonate desired regions of operation or in case of and protects the user from any potential emergency. debris. The machine has also mechanical CONTROL, MEASUREMENT AND ACQUISITION SYSTEM The control and measurement is performed by the SCM3000 electronic board developed by MICROTEST. This electronic board provides a closed loop control of the machine and analogue to digital conversion for at least 8 channels. The control includes digital input/output lines connected with the machine and motor driver covering the rest of the control and security functions of the control system. The machine control can be monitored by means of a computer via USB connection. The software SCM3000 allows also the recording of the different quantities data during the test. EM2/FR machines make use of this SCM3000 software that enhances the features of the machine for any kind of test or material, allowing the user the full control of any of the functionalities of the machine. Itâ&#x20AC;&#x2122;s a very reliable and adaptable system. The description of the SCM3000 software specifications is shown apart. All database and controlled parameters are managed using a computer (included) with the MICROTEST SCM3000 software (English version).

curves can also be rescale, recall and replot by a Graphics Editor The control system also includes: software selectable servo-control by force or by displacement (or other quantity), displays for the configured channels, digital zeroing of any channel, fully configurable channels, calculated channels, configurable alarms, digital recording of every configured quantity, selectable sampling, automation of the tests (tests methods and complex sequences of movement or load), definition of test parameters, calculations, graphical display of recorded data and test results, etc.

SCM3000 software helps the user to automate his operations, providing a powerful Method and Result Editor, with the possibility of exportation of data to Excel ÂŽ or ASCII files that allows the generation of customized reports. The test

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Electromechanical Materials Testing Machines EM2 MICROTEST

Technical Specifications MODEL FORCE CAPACITY CROSSHEAD TRAVEL (typ.)

EM2/02

EM2/10

EM2/20

EM2/50

Position resolution Horizontal test space Max. Vertical Test space (**)

EM2/300

EM2/500

2

10

20

50

100

200

300

500

mm

500

700

1200

1200

1300

1200

1200

1200

2 columns

Type of frame

Crosshead min. Speed

EM2/200

kN

Columns

Crosshead Max. Speed (typ. values in bold)

EM2/100

Table top

mm/min

Floor standing

50

100

100

100

100

100

100

100

500

500

500

200

200

200

200

200

1000

1000

1000

1000

500

-

-

-

0.001

0.001

0.001

0.001

0.001

0.001

0.001

0.001

0.005

0.005

0.005

0.002

0.002

0.002

0.002

0.002

0.01

0.01

0.01

0.005

0.005

0.005

0.005

0.005

mm

0.001

0.001

0.001

0.001

0.001

0.001

0.001

0.001

mm

240

400

525

525

530

530

530

710

mm

500

700

1200

1200

1300

1200

1200

1200

<5.10-6

<5.10-6

<5.10-6

<5.10-6

<4.10-6

<4.10-6

<4.10-6

<4.10-6

930 520 520

1300 700 500

1980 940 625

1980 940 670

2215 940 690

2215 940 735

2265 940 735

2450 1170 820

100kg

250kg

400kg

450kg

680kg

740kg

770kg

1500kg

0.5

0.5

0.5

0.5

0.5

0.5

0.5

0.5

TSC1/ 2000N

TSC1/ 10kN

PB2/20

PB2/50

PB2/100

PB2/200

PBF/300

PBF/500

0.1

0.1

1

1

2

5

10

20

230Vac 1phase

230Vac 1phase

230Vac 1phase

230Vac 1phase

230Vac 1phase

230Vac 1phase

230Vac 1phase

400Vac 3phase +N

0.6

0.7

0.7

1

1.5

2

2.5

2.5

mm/min

Stiffness

mm/N

Dimensions HxWxD (*)

H(mm) W(mm) D(mm)

Weight (*)

kg

Accuracy class typ. ISO 7500 Typical Main Force transducer Force N resolution Std. Nominal Supply Voltage VAC (*) Std. Power Rating kW Continuous (*)

(*) Dimensions, weights and supply voltage can be adapted to the customer’s needs. They are only approximate and dependant on the specific technical proposal. (**) Without accessories.

MICROTEST, S.A. C/ Valle de Tobalina, 10 28021 – MADRID (Spain) Tel.: (+34) 91 796 33 32 microtest@microtest-sa.com http://www.microtest-sa.com

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Electromechanical Testing Machines EM2  

MICROTEST EM2/FR electromechanical testing machines are designed to test a large range of materials, including: rigid and reinforced plastic...

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