This is a simple solution for those who bought a newer Ender 3 printer that has press fit pulleys and you want to remove/replace them in order to install stepper motor dampers or other modifications.
You will also need:
- One (1) long M5 screw. I used an extra M5 45 that came with the Ender 3.
- One (1) M5 nut. Got mine from the hardware store for 45 cents.
- Pulley heads with set screws. I got a 5-pack off Amazon for $7.
- One (1) allen wrench (hex key) that fits the M5 screw. I used the biggest one that came with my Ender 3.
This is not my design and I can take no credit whatsoever.
To support the original designer, please visit his blog here: https://mesimpressions3dmaison.blogspot.com/p/extracteur-de-poulie.html
The main reason I'm posting this is to provide a better solution for anyone trying to add dampers to their stepper motors. However, the original creator only has his content available in French. Please at least click on his blog to check it out as he has other neat creations.
- I already had my slicer settings really dialed in after ~50 other successful prints.
- Simply printed this piece at 100% infill to ensure strength.
- Not sure if it matters, but had Fill Pattern set to "Rectilinear" and Top/Bottom Fill Pattern set to "Archimedean Chords".
- Only took about 90min to print.
Removing the Pulley Head(s)
It's pretty straight forward how to use the extractor in order to remove the pulley head. Here are just a few pointers:
Really make sure that you get the screw directly centered on the motor shaft. It's worth taking your time and tightening and loosening the screw multiple times until you are satisfied it's dead center on the shaft.
I did NOT need to apply any heat prior. This gizmo was strong enough on it's own to pop the pulley head off.
- As a precaution, maybe you would feel more comfortable printing two blocks in case one fails. I was lucky and was able to use one extractor to do both my X and Y stepper motors.
Creator's original video
My terribly shot video showing how easy it was