🤖Robot Design Search

LEGO Stabilo 88 series fineliner pen holderI wanted to use a fineliner felt pen to draw or plot things with a LEGO Spike Prime robot. While it is not hard to brick-build something to hold a pen, what I found really difficult was to get the pen tip centered on-grid. This became an issue once I tried to demonstrate to students, that a tank-steering robot spins around the point right between the wheels - I needed a way to mount a pen directly and exactly centered on a stud/technic hole.