I suspect that all of these Chinese drivers are actually the same. Likely they are all Leadshine clones. The ones I buy from "Stepper Online" are leadshine clones.
Go to the leadshine web site and fine the product you have. It may have a different part number then click "downloads" and there are manuals and the software you need to program the drivers. But you will need either an actual Windows PC or Windows running inside a VM on your Linux PC to run the software. The closed-loop stepper drivers are very programmable with a point and click interface. But if all you want is to limit torque, make a mechanical fuse. Make some part of the motor to screw linkage from aluminum tube or plastic or maybe use a nylon set screw. Or simply place a smaller fuse on the power supply going to the driver. A 0.5 amp fuse should limit the motor torque That said, to prevent a crash but also allow the full speed and power of the motor to be used place a limit switch on the carriage. About ball screws. SFU1204 seems to be the smallest low-cost Chinese screw. (the major diameter is 12mm the pitch is 4mm) but if you need really tiny Tompson has them all the way down to 4mm diameter and has an 1.8 meter length for $148. These are high precision American parts with published specs on the allowed error. On Sun, Sep 13, 2020 at 9:29 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 > -- Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
