Rack and pinion to move lego parts
thingiverse
This model is part of a lego based 3D chocolate printer. and is part ofhttps://sites.google.com/site/kidscodemakespace/ Get the openscad "source" code from githubhttps://github.com/keesj/3d-makelib/tree/master/legocnc The motor used washttp://www.vanallesenmeer.nl/5v-stappenmotor-met-ULN2003-driver- Video of the device in action:https://youtu.be/cAP1mtJGGqM
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