Simon's adjustable Y motor bracket

thingiverse

Redesigned Y motor bracket for the Mendel Prusa 3D printer. Features top tensioner bolt to make belt tensioning easier, and it works. Modelled in heeksCad. It is intended to work with Y-carriage I designed and which doesn't have a built-in tensioner. The photo below with it on the end of my Mendel Prusa is to show how it fits with the rails and is not where it goes on the machine :) Inspired by two earlier designs both of which are good ideas but needed further development - this places the adjuster on the top rail where it is easy to access and the whole thing fits better. Instructions Just print it - I didn't need to drill out any of the holes on the one I printed. 3 perimeters, 3 layers, 0.35 nozzle, 0.25mm layer height, 25% infill at 90 degrees fill angle. I have removed the earlier version that was a bit too tight and replaced it with Y-adj_S2d which has a corrected top rail arc. The adjuster screw is a M4 and needs to be 40mm or more long.