Pen Holder for Eggbot

thingiverse

These four plastic parts replace laser-cut plywood components on an Eggbot. They are compatible with major devices and can be used by simply changing the pen holder, which provides better stability. These penholders work well with Sharpie and Sharpie Micro pens. Changing pens should align accurately. To print these parts, note that Eggbot has a mix of SAE and Metric hardware; the Coupler's nut is 5mm. The Pen Holder's nut is 6-32 to match the old thumb screw. The flexure is attached with the same original screws but the 3mm (or #4) screw that held the Arm side has been replaced by a 6-32 nut due to size constraints, and a small plate distributes stress on the top of the flexure. However, the Coupler photo shows it upside down; refer to the PDF for correct assembly instructions.