Ender-3 Y Axis Stepper Mount for Damper

thingiverse

When adding a damper to the Y-axis stepper motor, the X-shaped plate under the bed smacks into the motor before the limit switch is triggered. The solutions I found were to either nudge the limit switch, which costs some build volume and makes the nozzle home over the bed, or to shave off a bit of material from the aluminum plate to clear the motor. I didn't particularly like either option, so a friend and I came up with this solution. It replaces the aluminum plate that the stepper normally bolts to, fitting snugly around the end of the frame extrusion, and also replacing the mounting plate for the limit switch. This allows it to fit securely around the frame, keeping everything nice and square, and mounts to the frame using the 4 stock bolts already threaded into place. It provides a generous 6mm of extra room for the damper, so the stepper motor ends up in its original position. The mount is printed in two halves that are then screwed together and mounted onto the printer. To join the halves, you'll need either some M3 screws and nuts or some sort of self-tapping ones that will work fine. It's not too critical what you use - M3 screws around 35mm long would be ideal given the mount is 30mm wide. The mount is marked as a work in progress because it's still being thoroughly tested. I've only printed it and checked the fit on the printer so far, awaiting my dampers to arrive in the mail. A friend of mine is printing them now to test on his machine. If you print this and it works (or doesn't), let me know! I'll update this once we confirm it's good to go.