On Tuesday 04 July 2017 05:39:48 andy pugh wrote: > On 4 July 2017 at 10:07, Gene Heskett <[email protected]> wrote: > > The docs say motion.spindle-speed-in must be connected. I thought it > > was but at 50 revs, a halmeter says 0.0000. What does it expect to > > be connected to? I've a filtered feed to the pyvcp tach, in rpms? > > Or does it need rps? > > RPS
Which would be hm2_[HOSTMOT2](BOARD).0.encoder.00.velocity, which is noisy, 40% peak to peak running at about 25 rpms. That will make Z sound very rough, but if it can keep up, I should get a better thread. I've an idea how to not average, but to adjust the gain of a sum2 with a 4 cycle counter initially preset by the index pulse so the counter is in synch with the 4 step noise. I do have an averaging lashup that effectively divides this noise by 4, in place in the TLM and G0704. But the lag that creates is an offset in the taps depth that makes the threads a looser fit. An additional thou in the backlash might help that, but that has not been tried. If the addf's are in the right order, the lag of this idea, if I can make hal code out of it, would not be a factor in a G33.1 turnaround. I would need to make the 4 step counter run backwards then the spindle's absolute motion was backwards. Anyway, go see if the g33 now works, but first, make a new tool or regrind this one for a longer left edge as it needs to leave a clean shoulder at the left end of the first cut. The right edge only needs the depth of the thread, and thats only .075". Barrel and action wrenches s/b here tommorrow so I'll be able to test fit this pvc pipe. If it fits, I do it to the end of this SS barrel. This being the 4th, its a national holiday on this piece of dirt. I already put out the flag. :) Is anyone selling steady rest sliders with copper or perhaps oilite contact surfaces on the tips that could be used in place of the steel ones? All I can find today are rolling bearings or brass and the brass ones are a bit small, 55mm long for a smaller myford. Rolling bearings I have used but swarf can knock then out of kilter. Thank you Andy. 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-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
