Joint following error
22 Sep 2015 06:28 - 22 Sep 2015 06:29 #62844
by fery15sty
Joint following error was created by fery15sty
How to fix this problem..??
on the 5axiskins.c, if i use :
*(haldata->pivot_length) = 10.0;
no error..
but if i use :
*(haldata->pivot_length) = 250.0;
show error (joint following error) like this:
on the 5axiskins.c, if i use :
*(haldata->pivot_length) = 10.0;
no error..
but if i use :
*(haldata->pivot_length) = 250.0;
show error (joint following error) like this:
Last edit: 22 Sep 2015 06:29 by fery15sty.
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22 Sep 2015 06:34 - 22 Sep 2015 06:36 #62845
by fery15sty
Replied by fery15sty on topic Joint following error
This is file for my configuration..
Last edit: 22 Sep 2015 06:36 by fery15sty.
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22 Sep 2015 23:11 #62864
by andypugh
This probably means that the result of the calculations are such that the motor can not turn fast enough to follow the commanded motion of the controlled point.
Or, conversely, that the normal positioning error from the encoder feedback is magnified at the controlled point by the long pivot length so that the f-error limits are exceeded.
Have you tried adjusting the f-error limits? How do those limits compare to encoder resolution and the linear movement of the controlled point at a radius of 250?
Replied by andypugh on topic Joint following error
*(haldata->pivot_length) = 250.0;
show error (joint following error) like this:
This probably means that the result of the calculations are such that the motor can not turn fast enough to follow the commanded motion of the controlled point.
Or, conversely, that the normal positioning error from the encoder feedback is magnified at the controlled point by the long pivot length so that the f-error limits are exceeded.
Have you tried adjusting the f-error limits? How do those limits compare to encoder resolution and the linear movement of the controlled point at a radius of 250?
The following user(s) said Thank You: fery15sty
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23 Sep 2015 05:40 - 23 Sep 2015 05:52 #62871
by fery15sty
Replied by fery15sty on topic Joint following error
Thanks andy. you right..
Now i use f-error=100, and the result is no error
but, could i use this f-error value?
what the meaning of f-error?
is it safe if i implement on the machine?
Now i use f-error=100, and the result is no error
but, could i use this f-error value?
what the meaning of f-error?
is it safe if i implement on the machine?
Last edit: 23 Sep 2015 05:52 by fery15sty.
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23 Sep 2015 06:25 #62873
by andypugh
www.linuxcnc.org/docs/html/config/ini-co...s__lt_num_gt_section
Replied by andypugh on topic Joint following error
Look at FERROR and MIN_FERROR here:what the meaning of f-error?
www.linuxcnc.org/docs/html/config/ini-co...s__lt_num_gt_section
I don't know, that is for you to judge. But it seems high.is it safe if i implement on the machine?
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