GRBL_SPD v4
** CURRENTLY ONLY SHIPPING TO CANADA DUE TO NEW TARIFF LAWS **
Changes from version 3:
- 20 Mhz Microcontroller
- Improved RPM accuracy
- Improved smoothing for ON/OFF/RPM changes
- Auto off when using manual override
** Same footprint as V3 **
This circuit allows for the control of your Makita router (10,000 to approx. 30,000 RPM) through your sender software with a simple connection to three wires in the router. Set the RPM in your cut paths and GRBL_SPD automatically sets the router at the correct RPM. The circuit is designed for connecting to an Arduino Uno controller but can be used with any motion control that has a 5v PWM output and 5v power rail.
Tested on the 120v Makita 701C. Customers have claimed it works with the 240v 700C.
CONNECTIONS:
- 5v power and ground input from CNC controller.
- 5v PWM from CNC controller to control speed of Makita router.
- Optional output to add a relay for on/off control. (Mini relay included)
- Optional inputs for manual on/off and speed control. (Requires switch and potentiometer, not included)
Instructions included