The error message is not saying that the RPM is to great, it is saying that the RPM
ERROR is too great. This can be caused by an S word in your G-code that is too
different from the actual spindle speed, or by feedback that is not working or is
incorrectly configured.
Our plug-in code uses the declared S word to calculate the initial parameters
for threading movement. The tolerance band is from 50% of the declared
speed up to 125% of the declared speed.
We will change the wording of this error message in our next plug-in release.