Last night when studying this I uploaded some code to the Arduino just to get the stepper motors turning to check the wiring. I seem to be getting confused with what software I need on the Arduino to listen to data (the image file) being sent from a PC / Mac and then manipulating the stepper motors and pen connected to a servo (up and down). I have done loads of research about using GBRL and UnversalGcode Sender etc but just as I get one thing working I hit another problem. What I need help with is how to get my existing (the original machine) working. The promise of a second video on how to use it never materialised however the creator Tapendra Mandal, has uploaded a simplified model but now appears to be using a motor driver board. The video included links to a couple of gcode images and an Arduino Sketch which appears to listen for serial data (the gcode file) and activate the stepper motors and servo to perform the drawing of the image. The build uses an Arduino Nano and two L293D motor driver IC's (Not boards). How to Make a CNC machine at home - YouTube I have built mini CNC plotter using some old DVD drives the inspiration for which came from this video:
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