I have beeen running one of these machines for about a year now. The other day the spindle refused to run. Checked the motor by bypassing the controller and the motor is fine. I checked the board (Tonsen) and all except the Mosfet appears to be Ok. There are only a few component to check. I replaced the only suspect component the IFR840 Mosfet. Still the spindle refuses to start. I suspect the problem may be with the MACH3 spindle configuration file, but have no way to verfy the settings which are:

Spindle relays disabled
PWM base frequency 301
Minimum 30%
output Port1
Output Pin 1

The control box is labled Dongdadk.com Redonda. I can't get any help from the Dongdadk.com site or the Tonsen site.

Can anyone with one of these machines confirm the spindles settings for MACH3