On Thursday 03 January 2019 04:41:57 Gene Heskett wrote: > On Wednesday 02 January 2019 19:28:29 Gene Heskett wrote: > > On Wednesday 02 January 2019 14:38:55 Gene Heskett wrote: > > > On Wednesday 02 January 2019 11:07:23 Marius Liebenberg wrote: > > > > > > [...] > > > > > > > >Thank you Marius. Once again, the conversation has shown me > > > > > other potential ways to skin this cat. From that, I make > > > > > progress. > > > > > > > > > > > > > > > > > > > >It's a pleasure and good luck when you do get around to do it. > > > > > > So I'll give that method a shot once all axises are moving. > > > Nother hour or so. > > > > Which turned to 3+. All hooked up, y-a working, x-z not. Supposedly > > same wire config to all 4 motors. But 2 are stepping if driven slow > > enough, makeing 3 or 7 steps, then on the last microstep, drops back > > to were it started from. > > Dreaming on this, the next logical check is with power off, with an > ohmmeter, to verify that from my driver box, coils aren't swapped by > the wiring. A works, Y works, X doesn't and Z doesn't and those 2 are > noisy as all get out. Inverting the drive signals has no effect. So > obviously its the motor coils are being mix-n-matched between my > drivers and the motors. An ohmmeter reading will tell that truth. > These are the same identically constructed cables the drove the old > HF flawlessly but at the limited speeds caused by software stepping. Z > did work, driven by the oem box. X has never worked. Thats trying to > tell me the oem cables are not wired alike. > > Cheers, Gene Heskett
which was it, the plugs, gs16-4's for the motors are NOT factory wired alike. So I had to swap one end of each coil to the other channel of the driver. All that after I got new plastic in my glasses, so I'm back to seeing 20-20 or a wee bit better again. Got it semi-calibrated, within a thou or so an inch, and started it running my code, but noted that the A motor was burning my hand in about 10 minutes, just sitting there, so I need to pull the lid and actually get into the box and cut the current from the A/B/C driver to that motor to about 30% of what its getting. Not a MARK ON THESE MOTORS, SO I've not a clue what the ideal amps is. When driving the older 4" table, I had an 8 wire 435 motor on it, and the central bolt tightened to put a huge amount of drag, enough drag that the 435 motor had to have help in the form of about 90 psi injected under the table to flex the cast enough the motor could move it. I doubt if this motor, on this belt driven chuck/table, is over 120 oz/in. A 23, core about 1.25" long. The 435 motor was an 8 wire, wired in parallel as a 4 wire and I was feeding it the full 4.2 amps a 2M542 could deliver. Didn't bother that big motor, but is seriously cooking this little one. Anyway, I feel good. Real progress. If collets and 4mm tools arrive, I'll have this panel carved the next day, twice even, the second one will be for this machine. I've not rigged a digital dro up to cal it with yet, will rig something using a shars one channel dro I bought for the Sheldon's tailstock, but didn't buy a round tuit at the same time. My bad... This Shars dro has a good 8" of travel, which ought to get me close enough for the girls I go with. That extruded bed isn't flat, didn't expect it to be, but also didn't expect it would remind me with a big block of steel trying to stay put while I played with a mag base on my 1" dial. Cleaned it off a bit, John D., so I'll try to get some pix tomorrow. 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> _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
