Anycubic I3 Z-Carriage upgrade

cults3d

My Z Carriages started cracking on my Anycubic I3 so i decided to upgrade them. The LM8LUU bearings are clamped in with set screws and so far they work great. I moved the motor to the front of the carriage to put the center of the motor weight closer to the Z lead screws to stop twisting. There is a integrated X Endstop built into the left carriage. I did not include anything for a Z-Min endstop because i am using a probe and a Z-Max endstop. I hate using the Z-max endstop but the smoothieware overlords are dead set on not letting me use my probe as Z-min. The right carriage will require springs for the belt tensioner. The springs i designed them for are 9.6mm OD and 27mm length relaxed. The belt tensioner will require a 16 tooth Idler pulley with a 3mm bore. This also means you need to change the belt drive pulley out to 16 tooth to maintain alignment. I designed the carriages to use spring loaded anti-backlash nuts. they work well. If you have any questions please let me know in the comments. if you print them and please let me know how they work.