Ron's Compact Extruder, Mark III
Description
A Direct Drive Extruder Designed For Use With A Minebea Geared Stepper Motor, A Makerbot Drive Wheel, And A Makergear Groovemount (Or Similar) Hot End. Version 3 Simplifies The Design A Bit, And Tweaks It To Make A Stronger Print. I Left Ulti_Rcx_2.Stl, Along With The Old Sources Here Because I Broke Ultimaker Support While Redesigning It. Version 2 Addresses Two Issues I Had With Version 1. 1) Idler Pressure Was Very Touchy - As You Increased Pressure On The Idler, It Would Put Axial Force On The Motor'S Gearbox, Which Can'T Be Good. I Added A Pocket For A 115Zz Bearing, To Buttress The Drive Shaft. 2) I Found That Even With The Bearing On The Drive Shaft, I Have To Run The Motor Hotter Than I'D Like, So I Added A Bracket For A 40Mm Fan. Also, I Split The Extruder Body Into 2 Slices, To Make It Easier To Print. Finally, Thanks To Canadaduane, We Now Have A Variant Which Replaces The Ultimaker'S Bowden Extruder With A Lightweight Carriage Mounted Extruder. P.S. Ezmobius (Actually, Triffid_Hunter) Has Designed A Fan Shroud To Go With His Extruder Body Which Is Better Than The Bracket I Provided, So Use The Fan Shroud From Http://Www.Thingiverse.Com/Thing:24390
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