Download | Mi Grbl Z-axis Servo Controller [portable]

MI-GRBL GitHub Repository – The primary source for the modified code.

Alternative: Grbl_Pen_Servo – A popular alternative that emulates a "virtual stepper" for the servo. mi grbl z-axis servo controller download

This "hacked" version of GRBL redirects the Z-axis step/direction signals to a PWM (Pulse Width Modulation) signal compatible with hobby servos. MI-GRBL GitHub Repository – The primary source for

Standard GRBL firmware is built to drive three stepper motors (X, Y, and Z axes). However, many "2.5D" machines—like drawing robots—benefit from the lightweight, simple nature of a servo motor to lift and lower a pen. The MI-GRBL ecosystem provides the necessary modified firmware and software extensions to make this hardware setup functional. and Z axes). However

For pen plotters, you need a way to generate G-code that specifically tells the servo when to go "up" and "down."