On Friday 27 October 2017 10:39:04 andy pugh wrote: > On 27 October 2017 at 15:02, Gene Heskett <ghesk...@shentel.net> wrote: > > Now that I have my G0704 back among the living, I've noted that the > > spindle pid has to show a bit of error, > > If you are running on PGain this is entirely to be expected. (P-output > is zero with zero error)
Some Pgain, 4.5 IIRC. I should setup the halscope and see if I can arrive at a smoother control as I don't think 4.5 is enough. The idea was to get a stiff control, which under load it isn't 100% solid yet. My question is, why, since its a pm field brushed motor, which should be symmetrical, why the asymmetrical characteristic to the control? Or is this a further indicator of the fact that I am going to have to rebuild the head, replaceing the roller skate bearings with decent AC bearings? The noise from the bearings is getting worse as time goes by. Particularly in high gear. One thing I haven't done is to actually check the voltage being delivered to the motor to see if its in the pwm-servo amp. Easily done by sticking meter leads into the slots of the triple plugged extension cable I cut the src plug off of and used for motor power from one of Jon's pwm-servo amps, or plugging in an incandescent lamp in parallel with the motor. I should get off my duff and check that. Cold weather has arrived, and I've been busy this week with the WHAW transmitter. So all I've done in the garage this week is collect tools & test gear. Which is still in the new driveway decorator, a 2011 full crew cab Ford with a short box and Leer topper. The 99 GMC was rusting, like leaking brake fluid from odd places in steel lines, and the rear axle housing was also so badly rusted at the spring clamps it was leaking axle oil. Fixable, just bring money. Like being nibbled to death by ducks... Since the box was also due for derusting & restoration, and this Ford looked showroom new, I figured over the next decade the outlay would about balance. 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) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
