3D Printed 2D Plotter

UPDATE Section:
23-03-2019
The schematics of the arduino with the CNC shield are available at: https://cdn.instructables.com/FJ9/4VQ9/IYLZPS6Y/FJ94VQ9IYLZPS6Y.LARGE.jpg (disclaimer: picture is not made by myself)

30-12-2018
I designed a new pen lift mechanism which works very well. The angle at which the pen is pushing against the slider is dependent on the height difference you need. Also I added a BOM (based on AliExpress prices on 29-12-2018 in the Netherlands), the total price is around 100 euro's. The ZIP file that is added contains all the STL files and SolidWorks files so you can adjust it to your own needs. At this moment I am statisfied with the machine as it is and will not be updating anything soon I think. If there are any problems or suggestions please let me know ;)

29-12-2018
Right now I have made a pen/laser module lift mechanism which doesn't work that well. I have printed and assembled all the axis and the X and Y axis work very well (I have very bad rods an