Hey folks. I have a older VF2 (the one with the old control) and we are having problems biting us with the thermal comp. #1, we arent, and should be running a full warm up program in the morning. I don't know as this will help us however, since the machine might get used for an hour in the morning, and then not again till the afternoon. if it stayed on operation all the time, id just let it max its growth and call that 0, but this machine doesnt get used that way.
Right now, if you machine a long program, the longer the program, the deeper z cuts. Ive seen up to .007" after 2 or so hours in a surfacing program. At first I chalked it up to "old hass, lost steps:" etc.. but on another haas, program cut perfectly. If you put an indicator on the tool and wait, you can watch the tool move back up. This tells me the thermal comp is working, its just not working correctly.
I know there is a setting for the coefficient, and the last PPE, the tech said that "the number didnt look right" in the z axis. Its at something like -8000000 right now. I have been unable to find instructions for adjusting this number. I also believe that setting 109, (time since warm up) also is used. But I'm not sure how this number applies to the math formula the machine uses, or how it would need to be adjusted in relation to the thermal coefficient parameter.
Any help here is appreciated!
Edit: this is z axis parameter 133.
Edit 2: setting 109 is not thermal related on this old control as far as I can tell.