MK4 Y Axis Upgrade For Prusa i3 MK3/s/+ (MK3.25)

prusaprinters

Update (05/12/23):Fixed Y Axis travel issue (when running a Belt Test)Added the other MK4 Y axis components so you don't have to go over to the Prusa page to find them --------------------------------------------------------------------------------------------- Shortly after Prusa released the 3D Models for the new MK4 I started going through to see what could be used on the MK3, turns out its not much without a larger overhaul. However when it came to the Y Axis, most of the parts dropped right in. After printing the parts and installing them I found the bed mounting plate would run into the Y Axis motor mount and that just wouldn't do. After a quick modification of the model we now have lots of Clearance for the bed to move freely.  “Well why would I want to install this?”After a quick inspection of the models, you will find that they are all much beefier then its predecessor. Stiffer components means you can turn up the speed and these can handle the extra motion and resist flex reducing the risk of skipped steps or print imperfections.  The integration of a Y axis Belt tensioner was a nice addition to see, allowing for easy and reliable tension, all nicely tucked under the bed. After testing, I comfortably print using the MK4 Profile from PrusaSlicer with zero issues “What's needed to install?”The only piece you wont be able to find in your spare hardware bag is a 3mm x 20mm shaft that is needed for the idler.No Firmware update needed Notes:30% infill and 3 walls (1.2mm shell) is recommended0.2mm Layer Height  Install Notes:Install Y axis tensioner assembly with the head of the tensioning bolt towards the LCD