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

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)

RotarySMP wrote: 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The wiki is maintained or not by users so it is usually out of date or broken but does have a ton of useful information if you can weed through the outdated stuff.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

RotarySMP wrote: 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

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?

JT

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