On Thursday 18 August 2016 22:28:38 Martin Dobbins wrote: > >Agreed. And I have a saying when it appears that it will work, > > gopherit. I need to see if I can rewire this 1600 for parallel, > > which ought to speed it up considerably. But its 22mh per winding, > > so I don't expect miracles. > > > >And then tell us how it works when you've lived with it for 2 weeks. > > Remember, the original was using a PIC microcontoller to read aound 10 > pulses/rev from a spindle encoder to provide a tachometer, one ppr is > fed to mach 3 to coordinate Z axis movements. The microcontroller > also controls the stepper speed, direction, ramp up, ramp down. It was > almost like having a stand alone spindle controller. > > I could probably do the same with an arduino I've got kicking around > somewhere, but where's the fun in that when I haven't a clue how to do > it in Linuxcnc but would like to have a go? I need more I/O to start, > so that means a mesa 6I25, or more likely a 7I92 given the micro > motherboard I have. I have a Gecko G540 which currently get's shared > between lathe and mill. I'd like to keep that for the mill, but maybe > find something else for the lathe. Once I have all that figured out > (overly optimistic?) I might just start with the hardware.
In my own experince, porting stuff from machine to machine seems to hang out a sign, come and watch Gene screw it up while hooking it up to the other machine. :( That, and Murphy lives here so often I have to lock up the beer when I can feel his presense. Otherwise he drinks the last one without telling me I'm out. Oh, and that gecko? It will need most of the electrolyitic capacitors in it replaced at 4-6 year intervals. I believe theres more than one mention of that in the list archives. I've also found that the more or less generic 2M542 driver, one per motor, is about as bulletproof as they come. I bought a 7 pack of them about 6 years back. Zero failures so far. $ n the toy mills box as it has a rotary table I made out of a cheap grizzly 4"er, and 2 in the little monster lathe. The last one will run the x motor in this Sheldon when I am done with this conversion. > That might be OK if I didn't have 25 other projects plus I dread to > think how many "honey do's" bubbling up right now. I thought I had a patent on that. Darn... > >A question though, that 1800+ motor is going to be heavy, heavy > > enough > > > >perhaps to pull the Sherline out of alignment? Pix of it wnen > > mounted would be nice. :) > > Yes, I wouldn't hang it off the lathe the way the present motor is, so > much as mount it to the 1/2" thick piece of 1018 that the headstock > end of the lathe is mounted to. That sounds much more sensible. There are ready made angle brackets on ebay for that. Beats me trying to paste up something with my mig welder. I'll use one on the Sheldon I expect unless I have a momentary flash of brilliance. Those get rarer as the years toddle by though. Too many years, I'll be 82 here in about 6 weeks. > Thank you very much for your help with this, I think I avoided a > potential mistake. Thanks for the flowers. Take care and show us some pix when you get around to it. > Martin > > > > > > > > ________________________________ > > > ---------------------------------------------------------------------- >-------- _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users 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
