Print like shown in the last picture!

I used the print profile from kushana over at makerworld and made some adjustments

Quick overview of the kobra 3 plotter mod:

I am working on a new mechanism that allows for quick mounting the pen holder without screws. You can try it out for yourself but it is not tested at the moment (files with "clip" at the end).

The left and right mount arms are screwed down with the rear 2 screws on the print head.

You can leave these arm on your toolhead if you want when printing normally.

I designed a little spring mechanism to allow for a little play of the pen.

Use the print profile from the project and adjust the z offset to your liking (i used 2mm)

here a demonstration on how to set the pen correctly: youtube video (preset for plotting and 3mf for all files in video description)

please note that you have to add a pause in your slicer BEFORE the print sequence starts to mount the pen since anycubic does not allow you to remove the print preperation sequence.

BOM:

5x M4x8mm bolt

2x M4x12mm bolt