Brother TC-225 / TC-229 adventure!

A little backlash shouldn't matter much on a velocity mode system, when the encoders are on the motors.

Normal tuning should easily compensate for the analog scale being off. (just uses a little less P and FF1)

ok, thanks.

so why cant I get this smooth? what am I doing wrong here? why is there no autotuning!

all that jerking in that last video is all tuning. its doing aggressive reversals at each stop or slow down in the code. they may only be 0.0005", but it amounts to pretty bad vibration when its doing it ever 1-2mm. in sections of the code where g64 is able to keep the speed smooth, everythings happy.

I'm at a threshold now where no setting seems to improve it beyond where it is now. just make it slightly different.

heres the stock control video again. you can see that the axes are very smooth, especially during acceleration. no thump... so, we know it can be done

Can you provide a screenshot of the following error (and the velocity) to determine
if this is really a tuning issue or something wrong/suboptimal in the trajectory planner setup

ok, I will see if I can do a video showing the halscope for the y and the z (the worst offenders) while its running.
ill take some screen grabs as well, although I was having trouble with doing that. video might prove more useful.

note that this is also in just straight line jogging, not just that program.

which parameters would you like to see? ive been looking at f error, as well as the actual analogue output on the mesa card. they seem to have been giving the most clues to me.


thanks.

www.linuxcnc.org/docs/html/man/man9/at_pid.9.html

interesting... is this a thing that works?