I am in the process of converting my Nomad to use LinuxCNC (machinekit) with a BeagleBone Black + CRAMPS stepper interface board. As part of this, I had to wire the spindle motor driver to a PWM from the BeagleBone, and wanted to confirm correct operation. So, after debugging and getting everything working, I have discovered that the measured spindle speed ranges from ~1500 RPM to ~7000 RPM, not the specified range of 2000 RPM to 10000 RPM.
Here is a link to a video showing my setup using a hall effect sensor and a oscilloscope:
and here is a Google sheet with my measured values:
Has anyone else seen similar problems?