Had another look at the weekend & still have a problem with the plugin tripping mach3 as soon as I try to start the spindle.
The other plugin that is on the mach3 forum is a bit strange as well. If I start mach3 from scratch & press the spindle start there is a click & the button flashes yellow but the spindle doesn't start. If I load some gcode & run it the spindle starts, runs & stops as it should. If I then try pressing the spindle start button again the spindle starts & I can also change the speed, pressing the button again stops the spindle as it should, can do that all day long until I shut mach3 down. When I start it up again we are back to not being able to start the spindle until I have run some code.
Not really a problem as it seems to work ok when cutting anything but just seems a bit strange.