Ender 3 Pen holder for plotter

thingiverse

*I made the spring slightly more resilient so the pen doesn't shake around excessively, and added a M3 nut housing to make screwing in easier.* This part is designed for the Ender 3 Hero Me gen2 fanduct, attaching where the leveling sensor typically goes and remaining attached even when not in use. You can add a pen to it, tighten with the screw, and require an M3 bolt and nut to secure the pen. To secure the printed part, you can reuse the stock screws. It's suggested that the pen tip be positioned 2MM below the nozzle and include a Z offset so the pen doesn't crash into the bed. You must determine the optimal z height for your pen so it gets pressed down slightly; I used -0.4mm height and hence a Z offset of 1.6mm, also add a 4.5cm X offset to center the pen. I utilized this method to generate the Stl file from an image https://www.thingiverse.com/thing:66115 . Use "Target Height 1mm ; Add base 0mm ; Max Res 0.1mm" and then adjust the B/W threshold according to your preferences. If the output file is of low quality, I suggest using http://waifu2x.udp.jp/ to upscale the image 2X and setting the "Target size" to a high value, then scaling it down in the slicer. This is the profile I used for the plotter itself; make the stl file of the picture 1MM tall so that it produces only a single 0.1mm layer. https://drive.google.com/uc?export=download&id=1YUh12s8gIQ3uIC2LWAs3iwWXE5MP2u-A You can print the mount without support, but I suggest using "0.39" line width to assist the slicer with the spring. After printing, remove the supports I added.