If using microstepping drives, you will struggle to get fast enough pulses out without external pulsgen ... you need around 20kHz to get the motors up to corner speed .. below that, you are not getting max power from the motors, so I think you will struggle.
On Fri, 4 Feb 2022 at 02:49, Kenneth Lerman <ler...@se-ltd.com> wrote: > I'm considering converting a surface grinder to CNC. To start, I'll > probably just convert the longitudinal and transverse axes. > > I'll go with steppers for this -- I'm thinking NEMA-42 motors. > > My current Bridgeport clone uses servos and Jon Elson's hardware on a > little Intel Atom Box. I'm thinking of using a Rpi for this. It will need a > minimal display/control panel when completed, but initially will need a > display with touchscreen or mouse and possibly a keyboard. In the long run, > some buttons. and perhaps an mpg might be useful. > > I'd like to use a raw Rpi without adding special hardware directly. That > probably means using a USB or ethernet interface to control the steppers. > I'm thinking of using Mesa hardware. > > Can someone suggest the most cost effective way to do this? (Although I > have to admit, that after buying the timing belts and pulleys, the > steppers, power supply, stepper drivers, ..., it's too late to be really > cost effective.). And the surface grinder only cost me $300. > > Thanks, > Ken > > > > Kenneth Lerman > 55 Main Street > Newtown, CT 06470 > > _______________________________________________ > 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
