Our shop has a Puma 200 lathe with a Mitsubishi control, sometimes when touching off tools you can jog the tool untill the light comes on and it inputs the correct Geo. offset #, but maybe 1 time in 10 when you back off the tool the number will change by about 2"??? If your not watching the display when you back the tool off the setter you may not catch the error untill you go to use the tool, but I haven't crashed because I always check new setups closely before running and the error so far has been to where the tool would cut big on O.D. and short on length. The probe was replaced about a year ago because of a dummy operator crashing a tool into it, but this is a new problem in just the past few weeks and the probe hasn't been crashed, so I don't think the probe is bad because both X & Z act the same way, and I don't want to have to get another $600 probe. Any Ideas?

"just asking" so dont take offence, do you hand wheele to touch it off or do you use your jog buttons, next ? have you tried cleaning it, but it sounds to me that it is having a miscomunication problem and i dont think i would need to be replaced, but then again it is a mitsubichi LOL, sorry i dont know anything about them other than i had one years ago and hated it

I use the "JOG" to touch off. And yeah I don't much like the Mit's control either but have learned to live with it.

well i would say your going to have to have it looked at, but i did have a setter once that you had to touch off watch the number change let it sit there till the light went off "should only take a second" then touch it again