em2 microtest english d impr v11 oct 2013
TRANSCRIPT
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Electromechanical Materials Testing Machines EM2 MICROTEST
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Electromechanical Materials
Testing Machines EM2 series
MICROTEST
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
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MICROTEST EM2/FR electromechanical
testing machines are designed to test a large
range of materials, including: rigid and
reinforced plastics, composites, ceramics,
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 forcalibration purposes in Force Calibration
Laboratories.
They are built in capacities ranging
from 10kN to 1000kN, both tension and
compression. Under demand they can also be
made in other capacities.
In MICROTEST EM2 machines the load is
applied by means of a double screw driven
system with 2 or 4 guiding columns in the load
frame. The construction of the machine load
frame, with a double guiding columns and pre-
loaded lead screws, 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 withminimal effort. This
feature is further enhanced by a
programmable switch mechanism that allows
the operator to quickly set upper and lower
crosshead limits at any point within the frames
clearance.
The crosshead is actuated by the screw driven
system and guided by two or four 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 servo-motor and includes an
optical encoder or a high resolution motor
feedback system rotary for a continuous
measuring of the crosshead position that
allows also the control of the test speed.
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Electromechanical Materials Testing Machines EM2 MICROTEST
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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.
Adjustable Working Height Option
The working height can be adjustable for
seated or standing operation by means of a
supplementary adjustable mounting platform.
This second base plate can be positioned in
height and mechanically locked to the 4
guiding columns of the frame at the desired
position.
This mounting platform is normally place above
the lower base plate and coupling elements
and even the load cell base plate can be
mounted on it.
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 orhigh stability of load tests .
Electromechanical machines can be operated at speeds ranging from a minimum of
0.05m/min to a maximum of 200 or 600 mm/min (or even 3000mm/min, depending on the
model), which accommodates a wide range of materials and specimens.
Minimum maintenance: They do not need oi l, 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 crossheadallows 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.
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 a high resolution motor
feedback system rotary or 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
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ACCESSORIES
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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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
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MACHINE 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 modifiedunder demand to change the height of the
test zone, for example.
LOAD FRAME
The load frame has a high stiffness, with two or
four columns in chromed 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.
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.
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 or a high resolution motor feedback
system rotary for a continuous measuring of the
crosshead position that allows also the controlof 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.
To make possible an easy collocation of the
samples, the machine has a manual control for
the crosshead in the front panel of themachine that allows the changing of the test
zone height. The speed of this movement is
selectable by the SCM3000 software.
SAFETY SHIELD AND PROTECTIVE ELEMENTS
Every standard EM2 machine includes a
protective shield at the front side of the load
frame. This shield is made on a high resistance
and transparent polycarbonate and protects
the user from any potential debris. The
machine has also mechanical and electronic
limits features (including emergency button)
supplied to prevent movement of the actuator
beyond desired regions of operation or in case
of emergency.
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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. Its 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).
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 or ASCII files that
allows the generation of customized reports.
The test curves can also be rescale, recall and
replot by a Graphics Editor
A control panel is available in two ways: by
computer, SCM3000 software and an SCM3000
electronic unit with additional touch screen
panel interface (AFL-W10 type, optional) for
manual control which enables test start, test
stop, return, test status indication and variable
speed up/down jog buttons, fine position
up/down buttons and specimen protection
features. It includes two soft keys, results
display, programmable function keys and
specimen protection.
The SCM3000 electronicscan be connected to
this touch screen to provide stand alonemanagement of tests.
The control system also includes: software
selectable servo-control by force or by
displacement (or other quantity), displays forthe 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
the recorded data and test results, etc.
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Electromechanical Materials Testing Machines EM2 MICROTEST
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Technical Specifications
(*) Basic standard specifications. Dimensions, weights and supply voltage can be adapted to the customers needs. They are only approximate and
dependant on the specific technical proposal. Maximum speed value affects power value and therefore the power value can be different from the
above ones.
(**) Without accessories.
(***) This dimensions and weight are only typical or example values. This model is always defined under customers specifications.
NOTE:Because MICROTEST has a policy of continuous product improvement, we reserve the right to change design and specificationsat any time
without prior notice.
MODEL EM2/02EM2/5-
10
EM2/20-
30EM2/50 EM2/100 EM2/200 EM2/300 EM2/500 EM2/1000
FORCE CAPACITY kN 2 5-10 20- 30 50 100 200 300 500 1000
TYP. CROSSHEAD
TRAVEL (typ.)
(*)
mm
500-
1200
700-
12001200 1200
1300-
1500
1200-
1500
1200-
15001200
1200
(***)
Other values according to users needsor even Adjustable Working Height Option
Columns 2 columns (2 ball screws + 2 or 4 guiding columns)
Type of frameBench top Floor standing
Single test space (Double test space is optional)Floor standing
Crosshead Max.
Speed
(typ. values in
bold, static)
mm/min
50 100 100 100 100 100 100 100 100
600 600 600 600 200 200 200 200 200
High speed ranges by using AC servomotor can be defined according users needsto achieve speeds
1000mm/min to 3000mm/min (values to be defined in each case)Crosshead min.
Controlled
m/minMinimum crosshead speeds from 0.05m/min to