DS4 C
HAPTER
5 - T
ROUBLESHOOTIN
5-5
Table 5.1. Improper Motor Operation Troubleshooting
SYMPTOM
PROBABLE CAUSE
Incorrect Direction of Motor
Shaft Rotation
(a) Invert input command signal at Connector C1-1 and 11.
CAUTION
DO NOT ATTEMPT TO REVERSE DIRECTION OF ROTATION BY
INTERCHANGING MOTOR LEADS AND/OR RESOLVER LEADS.
Motor Drifts Slowly with Zero
Input
(a) Adjust balance Pot for zero speed (in position loop for zero
Following Error or zero input signal).
Uncontrolled Excessive
Speed
(a) Motor and/or resolver leads incorrectly connected.
(b) BDS4 backwards in position loop (motor shaft turns in wrong
direction).
(c) Incorrect alignment of system resolver (refer to Section 4.4.3.3).
(d) Defective BDS4-COMP Board.
Motor Erratic (a) Motor and/or resolver leads incorrectly connected.
(b) Incorrect alignment of system resolver (refer to Section 4.4.3.3).
(c) Improper grounding scheme (noise corrupting the input signal,
tach signal when used, and/or resolver signals).
System Unstable (a) Stability Pot improperly adjusted.
(b) Unloaded motor (load motor with TL specified load inertia).
(c) Incorrect compensation. Check BDS4-COMP Board against TL
Sheet.
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