pmdx 410 threading

[wwenter]

Hello Need some help I am running Mach4 pmdx 126 and 410 I am trying to get threading to work. I am set up with index pulse
smartbob usb-C  config. I have run several different g codes and I get the same error Pmdx SmartBoB-USB error, RPM too great for threading. I run the spindle off of machine gearing no vfd. I am at a lost as what to look for. Could use any help
Thanks
 

[Steve Stallings]

The error message is actually RPM Error is too great.

This can happen because the feedback is not working or because
the measured speed is out of range of what is accepted for
starting a threading cycle. The acceptable range is 50% to 125%
of the speed requested by the S word in your G-code. This still
applies even if you are manually controlling the spindle speed.