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Two Arduinos are used to control this DIY three-axis CNC plotter

Arduino TeamJune 23rd, 2021

We’ve seen a number of homemade CNC machines throughout the years, but Tuenhidiy’s build — made from some discarded materials — is no less impressive. This unique CNC plotter features a frame cleverly constructed out of two wooden wine boxes, which appear to be the perfect size with space for an Y-axis bed and an upright structure that actuates X movements. For the Z component, a pen is lifted using parts from a recycled CD player drive.

Electronics-wise, the project is also quite interesting as it employs servos rather than steppers for its X and Y axes. Actuation is handled by an Arduino Uno with pre-installed GRBL firmware and a CNC shield, which sends commands to an Arduino Mega running custom firmware. The Mega — plus a custom adapter board and an L293D shield — takes care of PID control for the motors.

More details on the machine can be found in Tuenhidiy’s write-up, and you can see it demonstrated in the video below.


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