Thread pitch only 72% of commanded value.
26 Jan 2016 08:55 - 26 Jan 2016 08:58 #69113
by RotarySMP
Replied by RotarySMP on topic Thread pitch only 72% of commanded value.
Thanks PCW.
There is a dead link in the following error wiki page. The graph doesn't show. Where should I report that?
wiki.linuxcnc.org/cgi-bin/wiki.pl?Following_Error
According to my StepConf produced .ini, I have:
FERROR =1
MIN_FERROR=.25
MAX_VELOCITY =30.319xxxx
Since the pitch lagged three mmm behind the commanded pitch, should it not have errored out once it exceeded 1mm?
I can se that I need to spend more time tuning the motion. I have a Gecko 201 onto a 4.5A Nema 34 running at 70V, so I should be able to increase the max velocity and acceleration quite a bit.
regards,
Mark
There is a dead link in the following error wiki page. The graph doesn't show. Where should I report that?
wiki.linuxcnc.org/cgi-bin/wiki.pl?Following_Error
According to my StepConf produced .ini, I have:
FERROR =1
MIN_FERROR=.25
MAX_VELOCITY =30.319xxxx
Since the pitch lagged three mmm behind the commanded pitch, should it not have errored out once it exceeded 1mm?
I can se that I need to spend more time tuning the motion. I have a Gecko 201 onto a 4.5A Nema 34 running at 70V, so I should be able to increase the max velocity and acceleration quite a bit.
regards,
Mark
Last edit: 26 Jan 2016 08:58 by RotarySMP.
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26 Jan 2016 15:02 #69122
by PCW
Replied by PCW on topic Thread pitch only 72% of commanded value.
Not sure why you did not get a following error but I expect the test is working
plotting Z's ferror might be valuable ( those settings are still quite large and should not need to be)
plotting Z's ferror might be valuable ( those settings are still quite large and should not need to be)
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28 Jan 2016 00:29 #69178
by BigJohnT
The wiki is maintained or not by users so it is usually out of date or broken but does have a ton of useful information if you can weed through the outdated stuff.
JT
Replied by BigJohnT on topic Thread pitch only 72% of commanded value.
Thanks PCW.
There is a dead link in the following error wiki page. The graph doesn't show. Where should I report that?
wiki.linuxcnc.org/cgi-bin/wiki.pl?Following_Error
The wiki is maintained or not by users so it is usually out of date or broken but does have a ton of useful information if you can weed through the outdated stuff.
JT
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28 Jan 2016 00:33 - 28 Jan 2016 00:35 #69179
by BigJohnT
JT
Replied by BigJohnT on topic Thread pitch only 72% of commanded value.
My plasma goes 7 in/sec on nema 23 which are faster usually that 34 and about the same voltage. What kind of position feedback are you using with a stepper?According to my StepConf produced .ini, I have:
FERROR =1
MIN_FERROR=.25
MAX_VELOCITY =30.319xxxx
Since the pitch lagged three mmm behind the commanded pitch, should it not have errored out once it exceeded 1mm?
I can se that I need to spend more time tuning the motion. I have a Gecko 201 onto a 4.5A Nema 34 running at 70V, so I should be able to increase the max velocity and acceleration quite a bit.
regards,
Mark
JT
Last edit: 28 Jan 2016 00:35 by BigJohnT.
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11 Apr 2016 09:47 #73090
by RotarySMP
Replied by RotarySMP on topic Thread pitch only 72% of commanded value.
Sorry for the late response. I had to rescrape the front spindle bearing.
There is no position feedback directly on the Z axis, just on the spindle. I made a 45 tooth Encoder wheel + index on the lathe spindle.
Mark
There is no position feedback directly on the Z axis, just on the spindle. I made a 45 tooth Encoder wheel + index on the lathe spindle.
Mark
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