Z axis will not move with chuck unclamped. Bar Puller.

2006 Mori Seiki NL2500

Bar Puller used to work. Now the Z axis will not move with chuck unclamped (after M11).

This used to work...
G97S100
G0G54X0Z-.250
G1Z-.950F80.
M11
G1Z-.450F80.
M10

I set the red light sensors at the back of the spindle to every combination of 'on' or 'off', this did not work.
I changed the 'chuck1 clamp direction from od chucking to id chucking' in Operation Panel, this did not work.

I need help solving this issue.
Do you have any suggestions?

Wayne

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