Hello,
I have a question about my encoder setup
I just installed a new VFD and now my spindle RPM is different than the commanded RPM.
So for example: I enter a M3 S2000 and the spindle turns 2500rpm (rpm feedback is from my encoder).
How can I correct this? Spindle pulley and motor pulley are different sizes.
.ini information:
Code:
ENCODER_SCALE = -150.0
MAX_OUTPUT = 2990
OUTPUT_SCALE = 2990
OUTPUT_MIN_LIMIT = 0
OUTPUT_MAX_LIMIT = 2990
.hal information.
I used the near component for the spindle at speed.
Code:
# ---setup spindle control signals---
net spindle-cmd-rpm <= motion.spindle-speed-out
net spindle-cmd-rpm-abs <= motion.spindle-speed-out-abs
net spindle-cmd-rps <= motion.spindle-speed-out-rps
net spindle-cmd-rps-abs <= motion.spindle-speed-out-rps-abs
net spindle-at-speed => motion.spindle-at-speed
# ---Setup spindle at speed signals---
net spindle-vel-cmd-rps-abs => near.0.in1
net spindle-vel-fb-rps => near.0.in2
net spindle-at-speed motion.spindle-at-speed <= near.0.out
setp near.0.scale 1.10
# Use ACTUAL spindle velocity from spindle encoder
# spindle-velocity bounces around so we filter it with lowpass
# spindle-velocity is signed so we use absolute component to remove sign
# ACTUAL velocity is in RPS not RPM so we scale it.
setp scale.spindle.gain 60
setp lowpass.spindle.gain 1.000000
net spindle-vel-fb-rps => scale.spindle.in
net spindle-fb-rpm scale.spindle.out => abs.spindle.in
net spindle-fb-rpm-abs abs.spindle.out => lowpass.spindle.in
net spindle-fb-rpm-abs-filtered lowpass.spindle.out
