Drawbot/Polargraph Gondola

thingiverse

This one-piece printable gondola replaces CD-based, pop-riveted alternatives and comes equipped with mounting points for a bulldog clip, micro servo for pen lift, and an M10x75 bolt & 3 nuts for weighting. The beaded cord fixes through the pen holder without additional fixtures. Printed at Bristol Hackspace on a RepRap Mendel, this gondola requires careful printing due to overhangs. Drill two holes in a bulldog clip and fasten it with M3 bolts for centred pen placement. Drill pilot holes for servo mounting and thread the beaded cord through designated holes. Note that the hole for the servo's pen lift arm may need adjustment, and overhangs can be improved in future versions. The bulldog clip might interfere with cord precision, so pass the cord through clip centers. The servo positioning works well, but remember to account for support width (15mm) and pen height above cord attachment (also 15mm) when writing driver code. Overall, this gondola is functional with room for improvement.