Thanks for the info. I was able to locate the problem. Found 3 issues.... The first was the connection between the servo and the ballscrew. The collar on the ball screw side wasn't tightened back down, I doubt this was the issue. But I tightened it back up anyhow. So my co-worker shot some more grease back into the ballscrew nut and it seemed to glide a whole lot better. I figure the tech didn't put enough in when he put the screw back in. The 3rd and what I figure was the problem, was we had a small shroud we made to keep coolant from dripping down behind the Y axis optical switch. I guess the tech either removed it and put it back in the wrong place/angle, and the Ball guideway on the table was hitting and binding the movement, causing the increased load. So I removed it, since it's now bent. I ran the machine through a series of manual jogs and semmed to be OK. So then the real litmus test began. I went back and started the program I was running the day before when the issue happened, and things cut and ran perfect.
I don't know how I could have over looked something as simple as that. I'm just glad it's back up and running, and we don't need another repair bill.
So thanks for the advice and I'll look at having them come back to do the ballbar test.  |