[boyvox]

When I change the Setup Units for the motor tuning dialog does that affect the G-Code I load in any way? I have G-Code in Inch units. If I hook up to a machine with Metric Ballscrews and set my motors correctly does Mach translate the inch-unit G-Code instructions to the correct turns for the metric screws? If so, does it slow down the program and/or do I lose accuracy?

[ger21]

You set up Mach in either Inch or Metric mode. It doesn't matter if the screws are metric, you still tell Mach how many step it needs to move 1 inch.

It's not recommended to try to run both inch g-code and metric g-code with the same configuration. I think there are some issues with Mach. If you need to do this, you can set up 2 profiles, one inch and one metric, and just start Mach with the correct profile whether running imperial or metric.

[boyvox]

So are you saying that if I am using Inch G-Code, and a metric machine, I should set up Mach in Inch units and convert the metric screw/step info to inches in the motor tuning dialog? That is what I assumed I should do but I just wanted to check and see if I should always set the units around the code or around the machine. Running Inch code on a Metric units set-up would not work; correct?

If I convert my ballscrew sizes from metric to inch I get this:

I have a 16mm pitch ballscrew
200 step motor
10 microstep drive

16mm pitch = 0.62992125984251968503937007874016 inch pitch

that's 1.5875000000000000000000000000004 turns per inch

1.5875 turns per inch x 200 steps x 10 micro steps = 3175 steps per inch

Just set units to inch, set my motor dialog to 3175 steps and load up my Inch g-code.