El Cheapo Motor Focus


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This image © Copyright 2018, Michael Fulbright

3D printer stepper motor mount and gear/pulley to connect to fine focus knob of stock focuser. I'm using a 28BYJ-48 stepper motor (about $2 each on ebay with controller!) and a $3 Arduino nano clone. So total focuser solution is around $10.

Date: 05/30/2016