Post
by CastIrony » Thu Mar 19, 2015 5:25 pm
I'm planning on cutting a decent amount of plastic, so a way to slow the spindle down without sacrificing a ton of torque is welcome.
There's a decent chance that the Carbide board has the right pins broken out. It's not one of the plugs on the top, but there's a header near one of the chips that might be connected. GRBL also needs a small modification to change the 'spindle direction' pin into a 'spindle enable' pin in variable spindle mode. I might end up doing that myself if it doesn't happen before I need it, it's like four lines of code.
Worst case scenario, it works fine the way I have it wired up right now, with a manual switch an knob controlling ON/OFF and RPMs, respectively. Automation would be *nice*, but it's not like I'm going to have a bunch of projects where the spindle will have to change speed in the middle of the run.
Shapeoko 3 #192 - Complete! Needs limit switches.