INDUSTRIAL INDEXING SYSTEMS, INC. IB-11B012
MOTION CONTROL SYSTEM, MSC-250 USER'S GUIDE
AUGUST 1998 MAINTENANCE 4 - 7
NOTE
Since this is a feedback system, there will always be some slight drift
to the motor shaft when it is tested in this manner. However, the
motor will not be free to be turned by hand.
7. Set an analog V.O.M. for use as an ohmmeter using the R´1 resistance scale or
use a DC voltage source of approximately 0.5 VDC.
8. Connect the positive meter lead to the POS OUT (red wire) command line
connector terminal and the negative meter lead to the GND (black wire)
command line connector terminal. This applies voltage (approximately 0.5 volts)
into the drive input acting as a velocity command.
RESULT: The motor should accelerate sharply to a controlled speed in a counter-
clockwise direction and decelerate sharply when either meter lead is
removed.
9. Reverse the meter leads to the POS OUT and GND command line connector
terminals. This changes polarity of the velocity command.
RESULT: The motor should accelerate sharply to a controlled speed in a
clockwise direction and decelerate sharply when either meter lead is
removed.
10. If all tests pass, the velocity loop is functioning correctly.
11. Remove all system power, remove all temporary jumpers, replace all
disconnected wires, and connect the command line connector to the controller.
Items to check if test fails:
a. Troubleshoot velocity loop according to manufacturer's recommendations.
b. Power supply voltages.
c. Motor armature wiring and polarity.
d. Feedback device wiring and polarity.
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