Rls encoder and vfd calibration
Posted: Fri Oct 16, 2020 11:51 am
Hi folks, after reading this thread on the forum : viewtopic.php?f=60&t=4043&p=33003&hilit ... all#p33003
I decided to go this way with my Taig mill and lathe with glockcnc spindle and motors.
I ordered and installed the encoder and ring from RLS (encoder RLC21ca06b and ring MR047B).
report_4C3FD31F8733-1212192740_2020-10-16_08-00-33.zip[/attachment]
I'm having problems getting the motor to match the commanded rpm speed. I've read every documentation and forum posts I could find and can't get it to work properly, So I thought you guys could help.
Here is my problem:
By playing with the Max spindle speed in Acorn against the maximum rpm in the motor driver i can tune it to match any speed, let's say 5k rpm (50%).
When doing so, anything above goes too fast, anything below goes too slow. Acorn Voltages outputs have been tested and are correct.
To fix this I would have to find the "bias" or "gain" on the vfd as suggested in the Acorn documentation:
My vfd and motor are from Glockcnc.com, it seems to be a generic Chinese vfd with a very badly tanslated manual and I can't find a parameter that would help my problem.
the Analog input dead band P1。12 doesn't help me to bias. I called Glockcnc but he couldn't help me, he has to contact the factory in china and that'll take a while.
the minimum spindle speed in Acorn didn't help me either.
I was wondering if there was parameters somewhere in Acorn that I could play with, that would help me skew things the right way?
Any other ideas?
Also, one last question, is it normal for the encoder reading to fluctuate constantly in Acorn? for example it goes from 5001 to 5003 to 5005 rpm several times per second.
Thanks folks.
I decided to go this way with my Taig mill and lathe with glockcnc spindle and motors.
I ordered and installed the encoder and ring from RLS (encoder RLC21ca06b and ring MR047B).
report_4C3FD31F8733-1212192740_2020-10-16_08-00-33.zip[/attachment]
I'm having problems getting the motor to match the commanded rpm speed. I've read every documentation and forum posts I could find and can't get it to work properly, So I thought you guys could help.
Here is my problem:
By playing with the Max spindle speed in Acorn against the maximum rpm in the motor driver i can tune it to match any speed, let's say 5k rpm (50%).
When doing so, anything above goes too fast, anything below goes too slow. Acorn Voltages outputs have been tested and are correct.
To fix this I would have to find the "bias" or "gain" on the vfd as suggested in the Acorn documentation:
My vfd and motor are from Glockcnc.com, it seems to be a generic Chinese vfd with a very badly tanslated manual and I can't find a parameter that would help my problem.
the Analog input dead band P1。12 doesn't help me to bias. I called Glockcnc but he couldn't help me, he has to contact the factory in china and that'll take a while.
the minimum spindle speed in Acorn didn't help me either.
I was wondering if there was parameters somewhere in Acorn that I could play with, that would help me skew things the right way?
Any other ideas?
Also, one last question, is it normal for the encoder reading to fluctuate constantly in Acorn? for example it goes from 5001 to 5003 to 5005 rpm several times per second.
Thanks folks.