Morning all; One of the things I'd like to do is put some limit switches on this thing, eventually. It doesn't have strong enough motors that a crash will hurt anything, but....
What I want to do right now is use G38.2 to set the home X,Y,Z. But I can't do that with tool comps on. And since I've not been able to find a probe that looks like the one youtubes "this old tony" has on a similar gantry mill, mounted via some green plastic to the side of the motor mount, that hooks to the probe input, and does all that when slid down thru the holder, or can be slid back up and out of the way when not being used. Looks like a steel needle with a cambridge turret top for the alligator clip to grab, and a taper to a 1/16" ball on the bottom. I fooled with this idea on the little HF years ago, failed in figuring out how to make the G38.2 closure work like a home switch. The next thing would be to set the tool radius as a permanent -home offset, thereby placing the edge of the tool at home contact, -2mm to the center of the tool diameter effectively placeing home at dro=0,0 2mm to the left or below if the tool is a 4mm tool and I am homing on the left end and front of the workpiece. Can this be done? With or w/o the tool rad offset, basicly using the tool itself for a homing switch? What I've been doing on the HF for at least a decade, is homing it wherever using the "home this axis" buttons, and depending on the limit switches to keep me from unscrewing the ball screws. With a parport and one Bob, no inputs for any of the rest of this stuff, and I'm starting out with this new machine with exactly the same i/o limits until I get a 2nd copy of this interface box built. Secondary, and unrelated to the above, question: Has anyone made the LCNC software based pwmgen run the spindle on a machine whose controller expects Mach on the other end of the parport cable? Internally its a 3 phase vfd, but running on 127 volts single phase AC, not 240 or better single phase like the $70 clones from Ebay. I'm assuming Mach3 has a pwmgen in its winderz driver, but no clue how Mach3 reverses it, or even if it can. The 200 watt PMDC on the HF has been working very well indeed from a PWM signal from LCNC, fed to a PMDX-106 which is using the OEM controller which has an amazingly stiff control, even w/o a PID anyplace in that machines configuration, or any encoder feedback, I hear zero indication that motor is working hard until it blows the 2amp fuse! So I had rigged an ammeter to tell me how hard it was working, and its saved me 100x its cost in blown 5x20mm fuses since. Another thing that amazes me is its total lack of any control over the cooling water pump, not even a socket on the control box to plug its line cord into. That seems like a recipe for a burned up spindle motor to me, so in the long run you can bet that will be tied to the spindle on signal somehow but with a 3 to 5 minute delay in the off signal. 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
