Check everything mechanical between the motor and tool. Shaft couplers, belt pulleys, belt tension, ballnut mount, bearing blocks. Perhaps the the shaftcoupler is slipping or the ballscrew isn't held in place axially.
/Henrik.
8 december 2019 10:16:12 +01:00, skrev agpearce@...:
I have a 3 axis router (dual X) running ballscrews.
It has work fine for a few years now, but started to cut off-size, and in consistant
Doing a steps/mm check over 1m, and accuracy is better than 0.5mm - This is repeatable
However, when I try to cut simple squares 25mm, they measure 25.6
If I do parrallel cuts at 25mm spacing, some are 24 some are 26 (almost like every second cut is offset by 1mm)
Re-test the 1m and still accurate.
This is new, and Im totally confused !
Can anyone help please
Thanks
Drew
