Stop y-axis belt slips with a lead screw conversion. Uses an 8mm pitch 500mm long lead screw, flat pillow block, coupler, and a nema 17 motor mount bracket. The nut mount attaches where the original belt attached to the Y-axis plate. In Marlin, change from 150 to 400 steps per mm, same as Z-axis. Limit switch may need a couple of washers depending on your system. You may need to slow moves depending on your stepper drive voltage.