Andy, I finally found in the docs, the pages that best describe how it
works, and then saw what I was doing wrong. I was not setting tune-mode
back to 0. So I used a much smaller tune-effort and reset all to the
new results, and it is now stable.
Side comment to the docs authors: It would be nice if the page number
showing at the top of each page in a pdf reader like okular, actually
corresponded to what you feed the printer to print the section your are
reading. The number at the top of the 4 pages I needed, was 520, but
when I printed page 520, I got page 464.
The man page needs to emphasize clearing tune-mode back to zero before
judging how it works. So I think I've got it.
One thing it doesn't mention, is the use of a pid in spindle speed. Best
practice there could be alluded to. Mine is stiff enough that there is
essentially zero effect of the cutting load on spindle speed, and the
main indicator that I'm about to stall it, is the squeak from the motor
iron when the current limit set in Jon's pwm-servo, set at about 18
amps, kicks in. Dangerously close to clearing the 20 amp breaker feeding
it, and obviously getting quite a bit more than the motors nameplate HP.
Normal draw is around 3 amps.
Thanks a bunch Andy. I think I am back to my usual monkey business.
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, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/>
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