Trying to get this thing to work

[GeneO]

I can now jog the 3 axis, but the spindle shows no sign of turning. I know it's good because the rudimentary program that came with this machine worked, and the spindle turned. It not running started when I bought mach3. Also, I'm an American and use inches for measure. The only thing I see about changing it to in. is in the config and tells me not to change it. Do you know?

[JAZZCNC]

Also, I'm an American and use inches for measure. The only thing I see about changing it to in. is in the config and tells me not to change it. Do you know?

The warning isn't saying don't change it, in fact, it's the only way you can change it. What it's saying is that if you do change then you need to change the Steps Per setting and Motor tuning to match.
So if set for Metric then the Steps per setting in Motor tuning will need to be multiplied by 25.4 so it moves the correct distance. You may also need to play around with the velocity and acceleration settings if doesn't run quite the same.