On Sunday 13 September 2020 12:59:56 Mark Johnsen wrote: > Gene, > > I'm not familiar w/ the 3phase steppers, but usually stepper drivers > have dip switches or a dial to change the current to the motor. You'd > want to flip them in such a way to select a lower current, which in > turn would provide lower torque. This 3 phase stepper is probably an > odd ball though.
No current switches, just direction reversal, and 2 schemes of step divisors. One base2, one decimal, > > If your stepper driver does not have dip switches and a dial, thus you > could possibly change the current with commands via RS232, which > you're trying to do. The problem is - what is the command to change > the current? Will it be stored (ie is there a save command)? What is > the termination of the command (ie colon:, LineCarriage/Return, etc)? > Without a manual, you're shooting in the dark. > > Mark > > On Sun, Sep 13, 2020 at 9:27 AM Gene Heskett <[email protected]> wrote: > > Greetings all; > > > > Has anyone managed to access one of these 3 phase stepper/servo's > > thru the rs232 port on the end of the controller? > > > > Back story: The x screw I used is one of the teeny ones I bought 3 > > of when I cnc'd that hf micro mill 15 years ago, buying then from > > Stuart Stevenson who said he'd salvaged them from a machine he had > > torn down, for a 50 dollar bill. Its possibly a 10mm screw, > > depending on how one measures a ball screw, its a couple blond ones > > over 8mm. The motor I just took off was a bit of an odd-ball, > > looked like a 272oz/in but was 1mm bigger than a stock nema 23. And > > I don't recall, in 4 years, that I've ever twisted that screw hard > > enough to make that motor skip a step. > > > > Fixing to test this fault circuit, I positioned a chuck jaw in the > > way and ran it up against it, and ran it far enough past that that > > the leverage was lifting the rear of the carriage off the bed. It > > didn't trip, so I backed x away and I am now concerned that it may > > have enough power to destroy that tiny screw. > > > > The docs on these drivers mention that port, but give no info on how > > to use it, or what one could adjust by acessing the driver via that > > port. Worse yet, if that screw does get damaged, I have no clue > > where to source another like it. That small has never shown up on > > fleabay. > > > > Is anyone any smarter than I at programming these? I'd have to start > > by making a serial cable with an rj45 on that end of it. > > > > Thanks all. > > > > 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 > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > _______________________________________________ > 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) 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
