My rpi4 has a problem.  No PID's in this config.

Home it, goto MDI and enter

G1f5z2
G1f5z-2
g1f5z2

is a continuous but noisy move of 4" in and back out.  5ips is close the 
the z self resonant frequency as neither motor has a damper. Set jog up 
to 25 ips, well above resonant frequency, motion is relatively quiet but 
still stutters. Ditto for its max of 66 ips.

Set jog to about 5", stand on z or x keys on the keyboard, roughly same 
speed, stutters. Move wireless receivers from about 18" away to 2" away.  
No change in the stutter, which is always there. Punch and activate 
dials, runs as smooth as I can turn them.

I have to say that the usb is being interfered with, but I can't find a 
place to put a halscope probe, It seems its all hidden in axis. Anybody 
got an idea what to poke at find this? I did catch it scrolling the mdi 
history while it was mid-stutter.  Once.

I went around the garage and turned off all the other mice and keyboards. 
I don't think the bluetooth is enabled.

Did I miss anything? 

Thanks all.

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/gene>


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