It's not that rs232 is bad for controlling a motor, I'm sure it's fine. It's just that since nothing readily exists as a hal component and the documentation on that driver is likely poor you'd best use a simpler means.
That's a coincidence your machine already has the same KB drive I suggested. Unfortunately I forgot about the archaic requirement of Bipolar analog +/-0-10v for controlling speed in both directions (I really hate brushed DC motors for things like this). I can't seem to find any PWM to bipolar analog controllers but that's all you would really need to make the drive work reversing, just using schematic F on page 22 of the manual. There's plenty of DIY schematics all over the internet for this but I can't find anything you can just buy. You can try using the relay to reverse the motor, not sure you the KB drive will like that. On a Shunt wound motor you reverse the field wires to reverse direction. Maybe it's best you look for a drive that accepts PWM or 0-10v analog and will switch direction with a logic input. Honestly I'd ditch the DC setup and grab an AC motor and VFD but I'd assume that's not an option. On Monday, July 15, 2019 at 5:14:25 PM UTC-4, Aurelien wrote: > > Hi > > I'm not really want "to go through the trouble of trying to make something > work over rs232" lol > > I have already a KBMG-212D + 24 V PWM à 0-10 V (K24P-10V), my motor shunt > have burned so i like to replace the controler before installing the > repaired motor. > https://fr.aliexpress.com/item/32811614945.html > > The starting point for wanting to replace this controler is for have a > reversible rotation because primarly i don't have any free wire for add a > high power relay directly to the spindle wire for control the motor FW/REV > I don't found any way for generate a negative PWM signal like the > datasheet wiring make me think : something is possible with -/+PWM > But now the things are a little different because i have remanaged the > wire and now i can try to control one relay for reversing direction. > > So if you think is better to keep my actual driver this is off course > better for me ^^ > > MK Beaglebone furaday-cape spindle-encoder for cnc-lathe > > Many many thanks for "Rs232 is too iffy for closed loop" > > > If you have better idea than put a reversible relay to the spindle brush > wire you are welcome > > Br > > > > > > -- website: http://www.machinekit.io blog: http://blog.machinekit.io github: https://github.com/machinekit --- You received this message because you are subscribed to the Google Groups "Machinekit" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. Visit this group at https://groups.google.com/group/machinekit. To view this discussion on the web visit https://groups.google.com/d/msgid/machinekit/c498fba4-c0fa-4b7d-999c-d42c43993de8%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
