MK3S Y-Axis Motor Mount Ultra -- Noise Dampening

IMPORTANT NOTE!

I designed this before getting a paver to rest my printer on, and found that with the paver this mod actually increased noise. This mod does definitely reduce noise if you're not using a paver, and just trying to dampen things.

In trying to find the best way to reduce the noise of my printer, I tracked the source of most of the noise to vibrations from the y-axis motor being transmitted through the printed part and into the frame. I thought that using a flexible material like TPU as an interface between the motor and the mount and between the mount and the frame would reduce the amount of vibration transmitted, and it did!

I ran a move from y0 to y200 and back at 3200 mm/min, which I found to be the speed that caused the most noise on my printer in stealth mode. The measurements were taken using my phone at the same distance with the printer at the same position on my table, and analyzed using Audacity. While it's not a perfect way of measuring volume, it's good enough for comparisons and shows a clear reduction in noise with this mount. I also tested 2mm thick spacers, but they were less effective.

The remixed mount is shortened by 1mm on the face that connects to the back plate, and left the same for the face that connects to the motor since there's flexibility in the position of the pulley on the shaft.

Print the mount in PETG with the same settings recommended by the original model, 20% gyroid infill, 0.2mm layers, 4-5 perimeters. I printed the spacers in Overture TPU with 100% rectilinear infill and 2 perimeters.

The hardware used is the same as the original non-Prusa bolts edition:

• 2x M3S Square Nuts
• 2x M3x10 Bolts
• 2x M3x25 Bolts
• 1x M3x14 Bolt

Just sandwich the spacers between the motor and mount and the frame and mount during installation, tighten it up and you're done! While this certainly doesn't make the printer “silent,” I think the improvement is worth the effort.