Prusa Y-Axis Torsion Motor Mount
Description
I Recently Replaced The 5Mm Timing Cables For The X And Y Axis On My Reprap Prusa With Synchromesh Cable. (Https://Sdp-Si.Com/Estore/Partdetail.Asp?Opener=Group&Partid=84751&Groupid=768) I Used The Pulleys (Http://Www.Thingiverse.Com/Thing:15923) Shared By Granz Initially With A 15 Tooth Pulley. Looking At The Pulley In Situ It Was Very Obvious To Me That It Is Very Much More Compact Than Your Average 5Mm Belt Pulley. A Plan Was Hatched. I Had Planned On Producing A Torsion Box For My Y-Axis Motor Since Seeing Lanthans Example(Http://Www.Thingiverse.Com/Thing:11017). However I Realised That Using The Much More Compact Synchromesh Cable Pulleys Left Plenty Of Stepper Motor Axle. So I Created A Torsion Box That Instead Of Holding A Pulley Within A Bearing, Grips The 5Mm Axle Directly. As The 5Mm Axles Are Machined To Very Low Tolerances, I Can Achieve Very Precise Constraint On The Stepper Motor Axle. The Design Uses The 695Zz Miniature Bearing A Readily Available Item From Ebay, But As The Scad File Is Parametric You Can Of Course Alter The Bearing Trap To Suit What You Have Available. This Design Is A Derivative Of Spacexula'S Y Bracket, Which In Turn Is A Derivative Of Prusa'S I Believe. If You Wish To, You Can Also Print A Reverse Bearing Trap Which Is Designed To Constrain The Motor Axle At The Other End For Motor Designs That Allow This. I Also Included Options In The Scad File To Print A Calibration Piece So That You Can Fine Tune Your Hole Sizes To Achieve Good Tolerances. I Made A Short Recording Of The Mount In Action... Http://Www.Youtube.Com/Watch?V=Zdsnrceeu64
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