I have a Fanuc 0ma controller built in 87 on my knee mill and I just experienced a new problem. I only have a couple weeks experience so far, so it seems like I'm constantly trouble shooting new issues but I figured thats all just part of getting to know your machine right? Well today I hit a snag more mysterious than most of the time and I'm hoping someone more experienced with my controller can help.
Long story short, I was in the middle of a part run and after inspecting one of my pieces, I realized the work was all shifted in the cross travel direction by about 1/16 of an inch. So now curious, I broke out the edge finder and checked how much off the zero position for that axis was and sure enough, it was out by about .065 from where I originally set it several parts back. So now I have this hunch that needs another's opinion.
I will sometimes Jog the table by hand towards me to make a part easier to remove when finished and I'll accidentally trip the soft limit switch on the cross travel much more frequently since theirs less travel there naturally. Like described, this had been the case once or twice already since zero setting my first part. Am I right to trust my gut here because now I'm wondering if hitting a soft switch could possibly uncalibrate a set zero position? If not, what should I check first? Thanks