gsketch | Convert images to G-code sketches

If not using a supported printer profile, identify the necessary limits of your 3D printer and add them to the profiles dictionary. These limits can usually be found on the settings page of your preferred slicer. (Feel free to contribute the limits profile of your 3D printer by submitting a pull request!)
Attach your pen mount and home your printer on all 3 axes.
Identify your pen home coordinates by attaching your pen to the pen holder a few millimetres above the surface and manually moving the print head until the pen hovers above the bottom left corner of the print bed.
Run python gsketch.py --image my_image.jpg --home x y z with an image of your choice and home coordinates obtained from the previous step.
Send the generated sketch.gcode file to be printed.
The printer will automatically home itself on all axes, move up the print head, and beep to signal it is ready for paper loading. Attach a piece of paper to the print bed (masking tape works well for me, but you may experiment with clips or magnetic mounts) and press the action button. (Low GSM papers have the tendency to bleed ink or warp if too much ink is deposited, therefore 180+ GSM paper is recommended.)
The printer will then move to pen home position and beep to signal it is ready for pen loading. Insert the pen to the pen holder such that it gently touches the paper and secure the pen in place. When ready, press the action button to unpause the printer, which will begin recreating the image.
If multiple colours are to be used, the printer will return to pen home after the current colour has finished printing and beep to signal it is ready for pen unloading. Remove the pen from the holder and press the action button. The printer will then move to a slightly offset pen home ready for loading of the next pen colour.
After completion, the printer will move the print head up and the bed towards the user. The printing process has finished.