Printable 25 cent harmonic damper for NEMA-23 steppers

Experimental harmonic damper that uses 25 pennies as weights to damp vibrations in NEMA-23 motors.

3D printer parts and enhancements

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I designed and printed this harmonic damper to see whether it could kill some of the awful noise my printer has been making since I converted the Y-axis to screw drive.  The short answer is, no it didn't help.  You can see a lot of videos on Youtube by guys testing these things on their CNC mills, but all the tests are run at high speed and typically in forward or reverse, not at low speeds, with a lot of stopping, starting, and reversing direction like a 3D printer does (and a CNC mill when it's actually cutting).

My test video here: 


and here:

If you're going to try it, print solid or with maybe 50% fill, no brim, no support material necessary.  Glue the pennies together in stacks of 5, then put them in their holes in the disk.  Screw the cover down with 6-32 screws and push the thing onto the flatted 1/4" shaft of your dual shaft NEMA-23 motor.

Materials and methods

- Your favorite ABS or PLA
- 25 pennies
- a little glue
- 5x 6-32 screws



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5a8f31ee508cc99b8d2b376800c2c76e?default=blank&size=40Guilherme Silvestre added this to the PEÇAS IMPRESSORA 3D collection ago
1b6a9dcfbc26309b8d3a2c1136be1d25?default=blank&size=40joe perry commented ago

Over-Torque-Prevention Vibration-Damping Flexible Shaft Couplings- Mc Master Carr is what I use. They help...

Mini gold hands croppedMark Rehorst published this design ago