Wingnut Knob + Customizer

2016-05-20 Version 5 [added Customizer option]

This knob press fits on to a M3 wing nut. I use it on the wingnuts of a 3D printer build plate. The larger diameter of this knob makes fine leveling adjustments easier and more comfortable than using a wing nut by itself.

After installing these, I can now quickly adjust the build plate and no longer need to set a z offset in software. Movement from one digit position to the next moves the build surface 0.05 mm. More generally for ISO screws, the axial distance traveled by moving the knob from one handle cut position to next is screw pitch / numberOfCuts. M3 coarse pitch is 0.5 mm and the knob has 10 cut-outs. https://en.wikipedia.org/wiki/ISO_metric_screw_thread

Version 5 has default parameters to set a wingnut a little deeper into the knob. Add a M3 lock nut to the recess on the other side to keep the knob from loosening. If the wingnut opening is barely too loose or too tight, rescale the STL 0.5 % at a time to dial in