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Troubleshooting 6-5MN1904
Symptom Check
Motor is under control, but
when moved to a position
and then back to the start
it does not return to the
same position.
Using an oscilloscope, check:
H all encoder channels are clear signals and free from
electrical noise;
H they are correctly wired to the controller;
H when the motor turns, the two square wave signals are 90
degrees out of phase. Also check the complement signals.
Ensure that the encoder lead uses shielded twisted pair cable
and that the shield is attached to the shield connection only at
the NextMove BX
II
end.
Verify that the Ne xtMove BX
II
and drive are correctly grounded
to a common earth point.
6.2.3 Communication
If the problem is not listed below please contact Baldor Technical Support. An oscilloscope will
be useful for many of the electrical tests described below .
Symptom
Check
Cannot detect NextMove BX
II
Check that the NextMove BX
II
is powered and the serial
lead is properly connected.
Cannot communicate with the
controller.
Verify that WorkBench v5 is loaded and that
NextMove BX
II
is the currently selected controller.
6.2.4 Axis LED is red or St atus LED shows a flashing symbol
If an axis LED is illuminated red and/or the S tatus display shows a flashing symbol, use the
Error Log tool in W orkBench v5 to view a list of recent errors. Alternatively , type
PRINT AXISERROR and PRINT MISCERROR as separate commands in the WorkBench v5
Command window. Each of these commands will return an error code, a description of which
can be found in the help file.
Press F1 and locate the AXISERROR and MISCERROR keywords. The Error Handling book
contains topics listing the Status display indicators and basic error codes. Remember that
many error codes are the sum of a bit pattern so may not be listed individually . For help on
understanding bit pattern values, see the Bit pattern values topic in the Keywords book.