We got a new NM135 with Mach3 and we're having difficulties with the spindle.

Running M3S500 won't start the spindle. At M3S900 the spindle starts to spin and at M3S1000 it seems to spin at full speed. Setting the spin rate faster than 1000 doesn't seem to change the speed at all.

We ran the automatic spindle motor tuning. But it didn't do anything.
We're completely new to this.

Another question is that when we got the machine, there is a setup PDF for the Mach3mill. The problem is that the setup seems to make things worse, so we just work off of the NM135Universal profile. Is that right?