Have an '91 Okuma LB-15 with OSP 5020 control. I don't use the lathe very much and always shut it down when not in use. I was running a part the other day and needed to change my tool comp a few thou. I plugged in +.005 on the tool screen for the tool i was using. Ran two more parts and they measured the same as the last few parts. The .005 I added did not not change the diameter of the part. The tool comp didn't take. It was the end of the day so I shut her down. Next day start her up and first part comes out with the .005 compensation I had added the day before. So when the control is up and running the tool comp is flakey. If I make a tool comp adjustment and restart the lathe the tool comp adjusts perfectly.

So what could cause the machine to not "take" the tool comp input. I know it worked previously. No alarms are present. No indications of anything wrong with the lathe otherwise. If there was a problem with the memory wouldn't the control tell me that?

Any thoughts????
Thanks