Does the A axis have a brake when at position?
If so either the brake is coming on prematurely before final position is reached or the drive is not being set to disable when in position.
If it does not have a brake, it may be have a hard time keeping position for some mechanical reason, or even tuning.
Can you measure the initial current when a move is commanded?
Al.
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CNC, Mechatronics Integration and Machine Design.
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E. |