Greg's Wade extruder for Prusa i3 redux

thingiverse

This user has made several alterations to Misan's modified Greg's Prusa i3 design. Key changes include a 2mm deeper base to prevent interference between the idler hinge bolt and X carriage, a thumb-grip on the idler, and a 1mm larger hole for the 608 bearing. The forward foot of the base was shortened by 10mm, allowing for a fan mount on a standard X carriage. Legacy mounting holes were removed, while recessed M3 nut traps were added for JHead (wildseyed) mount. The idler hinge's nut trap radius was increased by .25mm, and an OSH logo was tucked under the motor mount. The thickness of the bearing washer was changed to 3 times the layer_thickness. A 40mm fan holder was added to the design, fitting on a spare X carriage hole without increasing width. Recessed carriage mounting holes' radius was increased by .1mm for better M3 bolt fitment. The idler's beveled guide was moved outward slightly, and the cutout for the 20mm idler bolt was increased to M8/2. Separate openscad files and STLs are available for a 30mm fan with adjustable size, and versions of the base and idler with alternative hole configurations have been uploaded.