Okay last night I ran into two backlash problems I've not yet seen before while setting up my X axis. First off I replaced my ball nut with larger balls to reduce backlash. After installing the new nut and testing my backlash by moving the table in step mode by .001 increments and then moving the other direction, and watching for indicator movement, I came up with about .004 backlash. This struck me as weird, because I did the same on the Y axis and it has .001 backlash.
So I decided to move .100 via MDI and then back to zero. Same result .004. Now this is where it gets weird. I next decided to move a larger amount like 1in. The table came back to zero perfectly every time. I increased the movement each time until I was at the full travel of my machine, and guess what, perfect every time. I don't get it, anyone have any ideas?
The second issue is backlash comp. When I turn it on and it goes to move in the opposite direction it hesitates for a second and then it moves. I have the backlash comp set at 100% and it enabled, but it seems no matter what I put in the % box it has no effect on the machine. I've used backlash comp before many times and this is the first time this has happened.
Any help is appreciated.