5841
General Mach Discussion / Re: Motor Tuning
« on: February 28, 2013, 07:13:51 AM »
Could possibly be backlash, it would be quite a lot for a new machine but if there is indeed a gearbox involved then its possible.
You could easily test for it, what to do is set up a clock (Dial Indicator) on the bed and put the point against the cross slide, put Mach into step mode of maybe 0.001" and jog onto the point a bit then zero the X DRO and then jog back in the 0.001 steps and as soon as the needle moves stop and look at the DRO in Mach and see how much it reads, that is your backlash, or twice your backlash for Dia mode.
Backlash could be in many places, could be screw, could be gearbox, could be bearings of screw or flex in mounting brackets or even gibs needing adjusted.
Hood
You could easily test for it, what to do is set up a clock (Dial Indicator) on the bed and put the point against the cross slide, put Mach into step mode of maybe 0.001" and jog onto the point a bit then zero the X DRO and then jog back in the 0.001 steps and as soon as the needle moves stop and look at the DRO in Mach and see how much it reads, that is your backlash, or twice your backlash for Dia mode.
Backlash could be in many places, could be screw, could be gearbox, could be bearings of screw or flex in mounting brackets or even gibs needing adjusted.
Hood