Galil Motion Control DMC-42 0 Series, User Manual

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Chapter 9 Troubleshooting
Overview
The following discussion may help you get your system to work.
Potential problems have been divided into groups as follows:
1. Installation
2. Stability and Compensation
3. Operation
4. Error Light (Red LED)
The various symptoms along with the cause and the remedy are described in the following tables.
Installation
SYMPTOM DIAGNOSIS CAUSE REMEDY
Motor runs away with no
connections from controller to
amplifier input.
Adjusting offset causes the
motor to change speed. 1. Amplifier has an internal
offset.
2. Damaged amplifier.
1. Adjust amplifier offset. Amplifier
offset may also be compensated by use
of the offset configuration on the
controller (see the OF command).
2. Replace amplifier.
Motor is enabled even when
MO command is given The SH command disables the
motor 1. The amplifier requires
the a different Amplifier
Enable setting on the
Interconnect Module
Refer to Chapter 3 or contact Galil.
Unable to read main or
auxiliary encoder input.
The encoder does not work
when swapped with another
encoder input.
1. Wrong encoder
connections.
2. Encoder is damaged
3. Encoder configuration
incorrect.
1. Check encoder wiring. For single
ended encoders (CHA and CHB only) do
not make any connections to the CHA-
and CHB- inputs.
2. Replace encoder
3. Check CE command
Unable to read main or
auxiliary encoder input.
The encoder works correctly
when swapped with another
encoder input.
1. Wrong encoder
connections.
2. Encoder configuration
incorrect.
3. Encoder input or
controller is damaged
1. Check encoder wiring. For single
ended encoders (MA+ and MB+ only) do
not make any connections to the MA-
and MB- inputs.
2. Check CE command
3. Contact Galil
Encoder Position Drifts Swapping cables fixes the
problem 1. Poor Connections /
intermittent cable Review all connections and connector
contacts.
Chapter 9 Troubleshooting ▫ 152 DMC-42x0 User Manual