High accuracy wall plotting at minimal cost, enrich all the whiteboards around you with surprising artwork!
Project tutorial by Fredrik Stridsman
A board with 160 moving cocktail parasols.
An Arduino Mini CNC pen plotter.
Project showcase by Kramick Saha
Hej jrcTexas, you were quite right! It seems to work fine to use the analog pins for digital things. I moved the servo and ir-receiver over there and reclaimed pin 0/1 for serial. I committed that and some various cleanup to the git repo, more useful debugging over serial now.
At home now. The uploaded stl indeed seemed very broken. I generated a new one and uploaded it. It seems to slice fine with Slic3r 1.2.9. Printing one right now just to make sure.
It sounds like rhe coordinate system is off after calibration. If for instance the left stepper is moving in reverse you will end up with a very weird coordiate system. The eprom writing is for storing state so that plots can be resumed after battery switches etc. It should only be writing after calibration, moving, etc.
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