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| Automatic Machine with Continuous Voltage
Monitoring System |
Introduction
MPM manufactures drop
tower test machines for automated testing of circuit boards. The drop tower
shown to the left runs in a fully automatic mode. Up to 12 electronic
components are monitored continuously for failure. The test machine raises
the rail cart to the user specified drop height within 0.010 inches, releases
the rail cart, and after impact with the circuit board, pneumatic pistons are
actuated to prevent a second strike. If the user defined failure criteria are
not met, the cycle is repeated until the failure criteria are met or until the
total number of impacts specified is reached. Failure criteria can be defined
for any or all of the components on the board, or the test can be terminated
after a predefined number of impacts with the board.
System Features
If requested, the MPM
drop tower test machines can be provided with instrumented strikers. An
instrumented striker option is used in applications that require measurement
of absorbed energy. Some important features of the MPM circuit board tester
are listed below:
-
Rigid frame
construction and precision bearings minimize transverse play of the rail
cart.
-
The test machine can
be provided with an electrically driven motor for raising the rail cart to
the desired drop height.
-
The test machine can
set the drop height automatically under computer control and the machine is
also equipped with a digital readout and hand control to accurately set the
drop height manually.
-
The test machine is
equipped with a computer-controlled rail cart release and also includes a
push button pneumatic release for manual control.
-
The base of the test
machine is enclosed inside a six-foot tall polycarbonate enclosure with an
interlocked door for safety during testing. The door is designed to permit
easy access to the test machine specimen support.
-
The test machine
includes a pneumatically controlled safety plate to protect the operator
while working around the test machine base.
-
Electronic system for
continuous monitoring of voltage or resistance of components on the circuit
board.
-
Test machines that are
equipped with an instrumented striker have the following additional
features:
- Up to 1,000,000 data points per test
- Data acquisition ranges from microseconds up to 100
milliseconds (longer acquisition times available)
- User friendly software controls acquisition and data analysis
- High speed, 12-bit acquisition board
- Strain gage amplifier
- Instrumented striker
- Hardware/Software manual
- Software
Please refer to our
Instrumented Impact Testing and
Drop
Tower
web pages for further information.
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