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MICROTEST EM1/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 for calibration purposes in Force Calibration Laboratories.
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Electromechanical Materials Testing Machines EM1 MICROTEST
1
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Electromechanical Materials
Testing Machines EM1 series
MICROTEST
2011
MICROTEST
MICROTEST, S.A. Instruments and Equipments for Materials Testing
(+34) 91 796 33 32 www.microtest-sa.com
Electromechanical Materials Testing Machines EM1 MICROTEST
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MICROTEST EM1/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 for calibration
purposes in Force Calibration Laboratories.
They are built in capacities ranging
from 20kN to 250kN, both tension and
compression. Under demand they can
also be made in lower and bigger
capacities.
In MICROTEST EM1 machines the
load is applied by means of a central ball
screw driven system in a dual column
frame. The construction of the machine
load frame, with a double guiding
columns and pre-loaded leadscrew,
make these frames have high rigidity with
negligible frame deflection.
This design allows for a single test zone
for both tension and compression tests.
The test zone can be modified by
changing the height of the upper static
crosshead along the columns and fixing it
mechanically with the help of the gripping
system of this crosshead. The machine has
fixed end of courses that limit the
displacement of the moving crosshead to
the values of the upper and lower of the
position.
Electromechanical Materials Testing Machines EM1 MICROTEST
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The moving crosshead is actuated by the
central screw driven system and guided
by two robust lateral columns. Thus a very
good force flow with direct force
transmission to the specimen is obtained
during the test. The vertical crosshead
travel is determined and limited for the
length of the screw. The moving crosshead
ensures the lateral guidance of the test axis
and is not subjected to bending loads.
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 moving 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 central screw,
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
moving 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 EM1/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.
Electromechanical Materials Testing Machines EM1 MICROTEST
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EM1 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.
Electromechanical Materials Testing Machines EM1 MICROTEST
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The EM1 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.
Electromechanical Materials Testing Machines EM1 MICROTEST
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This flexibility makes EM1 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.
Electromechanical Materials Testing Machines EM1 MICROTEST
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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 this frame has also the
nuts and bearing units to allow the soft
movement of the moving crosshead when
the screw is actuated by the driving
system.
The dimensions of this chassis can be
modified under demand.
LOAD FRAME: FIXED AND MOVING CROSSHEADS
The load frame has a high stiffness, with
two columns in chrome steel, an upper
fixed crosshead and the single central ball
screw that drives the moving crosshead,
guided by the columns. The test zone can
be modified by changing the height of
the upper static crosshead along the
columns.
The upper fixed 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 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 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.
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 position of the moving crosshead.
The speed of this movement is selectable
by the SCM3000 software.
Electromechanical Materials Testing Machines EM1 MICROTEST
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SAFETY SHIELD AND PROTECTIVE ELEMENTS
Every standard EM1 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.
Special EM1 version for High Temperature Creep Testing, 50kN.
Electromechanical Materials Testing Machines EM1 MICROTEST
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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.
EM1/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. It’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).
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
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.
.
Electromechanical Materials Testing Machines EM1 MICROTEST
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Technical Specifications
(*) 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.
MODEL EM1/20 EM1/50 EM1/100 EM1/200 EM1/250
FORCE
CAPACITY kN 20 50 100 200 250
MOVING
CROSSHEAD
TRAVEL (typ.)
mm 150 200 350
Columns 2 columns
Type of frame Table top Floor standing
Crosshead
Max. Speed
(typ. values in
bold)
mm/min
100 100 100 100
200 - 200 200
- - 500 - -
Crosshead min.
Speed mm/min
0.001 0.001 0.001 0.001
0.005 - 0.002 0.002
- - 0.005 - -
Position
resolution mm 0.001 0.001 0.001 0.001
Horizontal test
space mm 350 450
Max. Vertical
Test space (**) mm 700 700 950 880
Stiffness mm/N <5.10-6 <5.10
-6 <4.10
-6 <4.10
-6 <4.10
-6
Dimensions
HxWxD (*)
H(mm) 1420 2070 2360
W(mm) 700 900 990
D(mm) 415 500 500
Weight (*) kg 150kg 400kg 570kg 600kg
Accuracy class typ.
ISO 7500 0.5 0.5 0.5 0.5 0.5
Typical Main Force
transducer PB2/20 PB2/50 PB2/100 PB2/200 PBF/250
Force
resolution N 1 1 2 5 10
Std. Nominal
Supply Voltage
(*)
VAC 230Vac
1phase
230Vac
1phase
230Vac
1phase
230Vac
1phase
230Vac
1phase
Std. Power
Rating
Continuous (*)
kW 0.7 1 1.5 2 2.5
MICROTEST, S.A.
C/ Valle de Tobalina, 10 28021 – MADRID (Spain) Tel.: (+34) 91 796 33 32
[email protected] http://www.microtest-sa.com