This is a simple controller for a Pen Plotter that uses Grbl_ESP32 as the firmware and TMC2130 stepper motor drivers in SPI mode. There is a hobby servo connector for pen up/down control. The PWM ...

If you’re building a CNC or laser, there’s an excellent chance you’ll be using Grbl to get moving. It’s also a pretty safe bet you’d end up running it on some variation of the Arduino ...

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