Ender 3s1 Stiff and Silent Y-Axis Motor Mount

I was not only bothered by the noise the Y-Axis made but also by the lever the pulley was exerting on the motor. Also the end stop now registers against a wheel and not a redundant screw. A bigger motor should fit well.

You have to push the pulley further down the shaft (leave about 1mm gap). You will need a vice or a press for that. A socket worked fine for a press die, some hex nuts will probably work fine, too. Support the shaft on the backside of the motor while pressing, so the bearings won't get damaged! If you cannot spin the motor freely do not press!

The Y-axis end-stop has to be adjusted. Having it flush is accurate enough if you only use the official 220x220 build area. If you are greedy and want the full 235x235 use a square to determine the exact position. Secure the position of the end-stop sensor with a drop of glue.

When you have the  build plate removed, also tighten the screws that fix the Y-axis rail, mine weren't tight enough.

It uses original screws and 4 additional 20mm M3 screws.

Once you have it installed, you will be annoyed by the X-Axis sound. I made the walls of the plastic cover thicker by adding some putty and it worked very well.