HI Guys:
Here is a new darwin. Its tested for homing , probing and PWM spindles with latest version of HobbyMach 1877.
To use PWM, you tell Darwin in config there is an output for a spindle, just name one output (spindle) for example, set it to use a frequency
on active. The frequency you give it will be the base of the PWM, try 5000hz. Then in Mach4 map the SpindleON signal to the pp port and the
signal named spindle. (signal name is unimportant, this is just an example.).
In the spindle setup in m4, set a min and max spindle speed, this will actually control your pwm. If for example the range is 0 to 5000,
then an S2500 will make the signal named "Spindle" put out a PWM at 50% with a base of 5000hz or whatever you entered as frequency.
Remember though, is such a system your granularity is the kernalspeed divided by the base. So 5000hx in a 45000hz system will only give
9 levels of power. etc.. PWM output is automatic if any output is used as a spindle output AND has a frequency on output set..
BTW: This an unlimited,uncrippled release , all axis are functional.
Art