Hello everybody,
i bought this breakoutboad from ebay
LINK
. This board can generate a 0 - 10V analog voltage for my vfd by using pwm pulses. The problem i have now is, that at spindlespeed 30000 rpm (M3 S30000) the voltage is 0.05 V and at spindlespeed 1000 it is 9.6 V. But it should be about 10V at 30000 rpm and about 0.5V at 1000 rpm.
Can i invert the pwm output, that the pulses are minimal at 1000 rpm and maximum at 30000 rpm?
This is the part of my hal i used for the pwm generation:
Code:
loadrt pwmgen output_type=0
addf pwmgen.update servo-thread
addf pwmgen.make-pulses base-thread
net spindle-speed-cmd motion.spindle-speed-out => pwmgen.0.value
net spindle-on motion.spindle-on => pwmgen.0.enable
net spindle-pwm pwmgen.0.pwm => parport.0.pin-09-out
# Set the spindle's top speed in RPM
setp pwmgen.0.scale 30000
Thank you
Greetings
Michael
