Joint 0 following error
14 Jul 2016 18:12 #77451
by sticky
Joint 0 following error was created by sticky
I am setting up my 3 axis milling machine for the first time. I am starting with the X axis but every time I try to move it I get the Joint 0 following error. I have adjusted FERROR, but that did nothing. Any help would. Be appreciated.
I have attached my .hal and .inI files.
I have attached my .hal and .inI files.
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14 Jul 2016 20:14 - 14 Jul 2016 20:28 #77457
by PCW
Replied by PCW on topic Joint 0 following error
This is expected
A couple of things need to be done
1. Make sure your drives can be enabled and disabled by LinuxCNC (this is a safety issue)
2. Make sure the encoders count in the right directions, and are scaled properly
3. Set the ferror limits to about 0.5 inches (this includes MIN_FERROR)
4. Remove all the "setp pid.N.maxerror .0005 ) statements from the hal file (this is a PNCConf bug)
5. You now have a 50 % chance of getting a runaway, if you do, you need to change the sign of OUTPUT_SCALE in the ini file
Note: if the drive enables are setup properly a runaway will cause the drives to be disabled as soon as you exceed the 0.5"
following error setting.
6. Once you have approximate control, proceed to tuning
A couple of things need to be done
1. Make sure your drives can be enabled and disabled by LinuxCNC (this is a safety issue)
2. Make sure the encoders count in the right directions, and are scaled properly
3. Set the ferror limits to about 0.5 inches (this includes MIN_FERROR)
4. Remove all the "setp pid.N.maxerror .0005 ) statements from the hal file (this is a PNCConf bug)
5. You now have a 50 % chance of getting a runaway, if you do, you need to change the sign of OUTPUT_SCALE in the ini file
Note: if the drive enables are setup properly a runaway will cause the drives to be disabled as soon as you exceed the 0.5"
following error setting.
6. Once you have approximate control, proceed to tuning
Last edit: 14 Jul 2016 20:28 by PCW.
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14 Jul 2016 22:10 #77466
by sticky
Replied by sticky on topic Joint 0 following error
1. Check
2. The 7i77 does not appear to be receiving any encoder signals. My wiring should be correct, I need to figure out why they are not communicating to the 7i77.
2. The 7i77 does not appear to be receiving any encoder signals. My wiring should be correct, I need to figure out why they are not communicating to the 7i77.
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