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.
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 <ghesk...@shentel.net> 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 > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
