I set up my spindle and vfd on my shapeoko xxl so it gathers the spindle speed from the tool data base. What I have noticed is that no matter what my tool data base has in it for rpm, my vfd always reads 24000. Any help would be greatly appreciated.
Check you GRBL $30 value. It should be 24000. I think it defaults to something much lower than that (like 255). That value is your spindle max rpm and is what GRBL uses to set the PWM. At a very low value, anything above that will output the full 5 volts which your VFD will translate to 24000 rpm.
I saw a vid for Mike Meyers that shoed how to set the VFD to show the actual RPM of the spindle. Don’t hold me to it but I think it had something about pressing and holding the Shift Button? 
Thanks, that value is found in settings of carbide motion right?
Yes, you can view it and change it in CM. From the MDI type $$ and hit enter (you need the log open). That will list all the GRBL settings. Check your $30. If it’s anything other than 24000, then from the MDI type $30=24000 and enter. Do $$ again to verify your $30 took. Once that’s set you should be good to go
Tyvm, I will check it out
This topic was automatically closed after 30 days. New replies are no longer allowed.