Spindle speed from PWM to analog (0-10)
17 Nov 2017 16:52 #101948
by Xpertmill
Spindle speed from PWM to analog (0-10) was created by Xpertmill
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:
Thank you
Greetings
Michael
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:
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 30000Thank you
Greetings
Michael
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17 Nov 2017 17:10 #101950
by PCW
Replied by PCW on topic Spindle speed from PWM to analog (0-10)
You probably want to invert the PWM output pin:
setp parport.0.pin-09-out-invert true
setp parport.0.pin-09-out-invert true
The following user(s) said Thank You: BSOD
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17 Nov 2017 17:58 #101953
by Xpertmill
Replied by Xpertmill on topic Spindle speed from PWM to analog (0-10)
Thank you PCW!
i just checked it out. Works perfect!
i just checked it out. Works perfect!
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