One of our VF-0E machines will start moving in the Z negative direction while seaching for home.

Complete powerdown - diconnect off for a few minutes will sometimes cure the problem, but its been getting worse.

Last Monday morning it took well over a dozen power cycles to get the machine up.

This Monday will also likely be fun.

Another problem is that a few times due to all the repeated attempts to zero the machine, the head is down almost to the table and without Zero this edition of the software does not allow any manual movement to get the head back up.

Any Ideas?