4.2.2 Troubleshooting the drive board
Corrective action
table
Use the following table to troubleshoot the drive board:
SYMPTOM
CORRECTIVE ACTION
Motor produces
no torque,
Meter reads
high.
Note: See figure
on next page.
Ensure that the J6 5-6 jumper is out, or if in, that the enable
input opto is driven with at least 3 mA.
Disconnect the AC power. Disconnect motor cable and cycle
the J1 power supply Off and On. If the meter reads low, check
motor cable and motor for shorts across the windings or
between the windings and the motor case.
Motor produces
no torque,
meter reads low.
Note: See figure
on next page.
Verify that DIP Switch S1 position 6, 7, and 8 (current select)
are set correctly.
Re-check that the motor cable is wired correctly and properly
plugged into the drive.
Motor produces
torque but does
not turn.
Make sure that the STEP input is switching and meets specified
electrical and timing requirements.
Motor rotates in
the wrong
direction
Check polarity of the DIRECTION input. Also, check that the
DIRECTION input satisfies the specified electrical and timing
requirements.
Reverse the A and A motor phases.
Motor does not
reach expected
position
Check that the step size setting of the drive is the same as the
step size setting of the indexer.
Verify that the motor does not stall. If it does:
1. Use a finer step size to avoid low-speed resonance problems.
2. Enable Digital Electronic Damping control. (S1 position 4
OFF).
Check that the STEP and DIRECTION Inputs satisfy all
electrical and timing requirements.
4 - 4
6430 Installation and Hardware Reference Manual - Rev 1
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