On Thursday 11 July 2019 00:11:33 John Dammeyer wrote: > Well. Not the best in the world. And lots of false starts as much due > to CAM management and G-Code generation. But the limit switch holders > for the Y axis are done. LinuxCNCwith one parallel port, two HP_UHU > Servo drives, one Gecko Knee Stepper drive. The HB04 Pendant made > this a lot easier. > > Now to figure out how to mount a Knee Home Switch. > > And properly configure a tool table with the tool heights. > > John Dammeyer
Those look pretty darned solid John, better than any I've done, but I am usually more space constained too. My new 6040 gantry's y home is a jury rig if there ever was one, and subject to whatever overtravel up to about 1/16" before the gantry crashes. So I have the switch, a teeny pushbutton mounted with about 10 thou of button travel, mounted on a 1/16" thick 2.5" length of alu about 3/8" wide, bolted to the front face of the bed so the switch hangs out past the bed facing to the rear, with a 4-40 screw planted in the face of the gantry edge to push it. The boltdown screws are a long inch away from the switch, allowing the alu to flex about 1/8" without permanent deformation after the switch is bottomed. With the 4-40 screw set for the length of stickout to keep it from crashing, I can feel the mount flex as it homes, but cannot see it. I've std roller micros in other places. With 5 dollars a bag of ten switches, repeatability is well under a thou all around. I'm pleased, which is what counts. Limits are set in the .ini file, about 50 thou from crashing at the other end of the range. I may replace the z motor yet, all of them are very small nema 23's, and with the weight of the spindle motor on the z sled, lift speed is restricted to about 1/3 the maxvel of the x and y dirs, currently set at about 190"/minute. No labels on the motors, and no data on the dip switch settings of the tb6560 drivers I took out, so motor currents are set in the low 2's based on motor heating. I replaced that whole control box since I was unable to even get a full translation of the Chinese manual out of googles translator. So it now has a quad of 2m542's that used to drive my hf mill. and a clone 1.5 horse 120 volt vfd. Runs either direction. But if I use tool contact to set tlo with a g38.2, I have to clip a ground onto the tool. Too much of that grey epoxy paint to get a ground anyplace. Even the motor to spindle doesn't reliably get thru the spindles bearings. Thanks John. 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) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
