Taurus Y axis for Prusa MK3 and MK3s

thingiverse

I redesigned the Y axis to make it better:\r\n\r\n- aligned belt with plane of Y carriage bearings \r\n- perfectly flat belt so no torque is induced on bearings\r\n- widened belt clamp and more rigid connection to bed\r\n- **moved end stops to idler housings to protect linear bearings**\r\n- robust no-flex idler housings\r\n- oversized toothed 608 idler pulleys\r\n- reduced belt angles and matching profiles for extended life\r\n- motor moved to center to balance belt and shorten longest free span\r\n- extra stiff motor housing with screw mount utilizing all 4 stepper points\r\n- bearing support of motor shaft end\r\n- tool-free belt tensioning\r\n- tensioning does not alter belt drive geometry\r\n- optional center foot to help support frame (damp vibrations?)\r\n\r\nAll this for FREE! You will love how solid and quiet the bed is, especially when hitting the end stops. No more bearing bashing, or layer shifts after power recovery.\r\n\r\n[motion](https://i.imgur.com/y6OOe3y.mp4)\r\n\r\nThis mod replaces the stock MK3 y axis and requires no prerequisite mods, though I highly recommend [Taurus hard feet](https://www.thingiverse.com/thing:2805753). This compliments both [Taurus X axis](https://www.thingiverse.com/thing:3308841) and [Taurus Z axis](https://www.thingiverse.com/thing:3321711) upgrades, but each are independent and can be done in stages. See also [Taurus LCD](https://www.thingiverse.com/thing:3352476) as finisher piece.\r\n\r\nPost your makes. I would love to see them.\r\n\r\n**Update** I posted all the step files for some folks who are looking to hack onto a bear frame or other mods. I don't have time to do that but happy to support the cause. Note that this would require a center cross member that is not standard on the bear frame. If you still think you want to do it, I'd recommend my slot-lock attachment system as seen in TauZ and Tau brace.\r\n\r\n**Update** I redid the foot so it screws directly into motor frame which is far better and simpler to print\r\n\r\n**Update** I reversed the middle screws in the motor frame (R2) so the nuts are under the stepper which I should have done in the first place. Duh.\r\n\r\n**Update** I made a few tweaks to simplify assembly and also accommodate a larger stepper for more torque. I am going to try this one that has good electrical specs: [48mm Nema17](https://www.amazon.com/gp/product/B00PNEQKC0/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1)