Bowden extruder sponge-mount vibration dampener for NEMA 17
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This mount utilizes two folded kitchen sponges at a 90-degree angle to securely hold the body of a NEMA 17 stepper motor-based extruder, similar to the Airtripper V3 setup. The sponges compress tightly between the inside of the mount and the body of the motor - there is an 8mm gap. When feeding your bowden extruder with high amps, especially if you have one of the longer-bodied NEMA 17's, you'll notice intense vibrations coming from the motor. If hard-mounted to the printer chassis, these vibrations can produce a very annoying sound. You cannot use rubber mounting-face couplers with these extruders for obvious reasons, and using rubber standoffs can be a trial-and-error process with a high likelihood of not finding soft enough rubber. I was surprised at the noise reduction provided by this simple solution. In my case, I estimate about 80% less noise, making it barely audible now. Instructions: Print with a perimeter of 1.6mm or more and infill of 25% or more using mild cooling settings. A built-in skirt for better adhesion is included in the design, which will snap off during printing as part of the height. The two holes are M5 (5mm) in size. It's possible that the vibrations may cause the motor to shift out of the mount if it's not angled properly. To prevent this, you can either loop elastic bands around the motor or mount it at a slight angle from horizontal so gravity keeps it secure.
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