On Monday 28 March 2016 11:53:09 Gene Heskett wrote: Back on topic, playing some more with g33.1 vs Z motor settings.
First, I looked it up, it is a 1600 oz/in motor made b y Longs, rated for 3.5 amps, but does not spec total or rms per winding in any of the pdf's I could locate online. I had it set for 3.5 peak or about 2.5 rms. I doubled the microstep rate which quieted it some, and ran the controller up to 3.5 amps rms. Acidentally disabled the stopped current reduction so in an hours playing so its a good burn your hand hot now. Found a different pdf that made it plain sw4 is inverted and that "on" shuts that current reduction option off. Fine tuned some accels about 5 to 10% slower, found the backlash was now .00675", and recalibrated the z scale by about .05%. That cheap, skinny 16x5 screw might get replaced quicker than I had planned on. :( Went back to the deeeeep hole in the air tapping with a 4mmx.7 virtual tap. While I did not gain any real Z speed, it did seem to be happy at 41IPM & didn't upchuck until it had run quite a while ending with a z hitting the softlimit while it was still just touching the home switch on the upstroke, which tells me it was losing Z steps getting turned around at the bottom of the stroke, so it thought it was higher than it physically was. I was adding another 1% to the spindle revs about every other peck. At quite close to 1400 revs, the overtravel at the bottom was around 1180 encoder counts, or a hair over 4 turns to get stopped at the bottom of the imaginary hole. It was one turn, 268 encoder counts at 500 rpms, and about 1/4 turn at 200 rpms. Humm, those are subject to redoing with the backgear in low, but until I remember it, no clue if they'll go up because of the increased motor rpms, but its for sure they won't be the same. I wonder, is there some way I could feed that count back into the gcode so I could mung it into a distance measurement using the interpretors math? Displaying that result in a slider under the tach would be kewl. :) 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> ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785471&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
