Hi all, I am having an issue with my ARROW 740. This is a intermittent problem, when I try and tool change the spindle will not orientate to the correct position. It doesn't seem to getting a signal to say that it is in the correct position. This means it spins around 5 times clockwise and 5 times counter clockwise trying to locate the correct position.

M19 still works as it should, I am pretty confident that the proxy switch in the head is ok as it illuminates and stops the spindle when M19 is called.

ALARM 39-76 states that the remedy is as follows:

Input CR_OR_COMP ON
Either Output CR_SPDL_ORN or Output CR_SPDL_ORN2 ON (Not both together)

This makes no sense to me, any help would be much appreciated...