Hi All,

First of this might seem a daft question but I just can't get my head round it.

I'm trying to re-fit my Chinese router with Mach 3 as controller. The machine has Rack and pinion X and Y axes with 20 tooth pinion (I believe Mod 1.25) driven by 5:1 reduction and 1600 micro-steps per rev motors. The existing controller (NcStudio  ) is set up to 0.01042mm/step. This suggests that steps per mm are 1/0.01042 which is 95.9692898273
Surely I cant set this figure in "Steps Per" in the motor tuning screen.

What am I missing?

Many thanks,

Bob.

I don't think you are missing anything, not checked your calcs but if that is the number you come up with just enter it. I think Mach allows up to 8 decimals in motor tuning, should get you close enough with such a setup
Hood

Thanks Hood, I'll give it a try, just don't understand how the system can send anything other than a whole number of steps.

Ah................ just worked out 96 steps would equate to 1.0006327978 mm I think I can accept that degree of error. 

It can't, it just gets as close as it can. It will however keep track of all decimals so will never be further out than one step.
Hood

All clear now, thanks