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Wobbless X mounts 1.0

by odudex, published

Wobbless X mounts 1.0 by odudex May 6, 2013
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Wobbless X mounts 1.0 by odudex is licensed under the Creative Commons - Attribution license.

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Summary

I've been using my first wobbless X mounts for a few months:
http://www.thingiverse.com/thing:33053
But I believe there are a lot of people still suffering with the ribs on their parts. This time I made the anti-wobble spring over a mix of original github prusa v2 parts and MakerGear, for both bushing and lm8uu z guides.

Solidworks Files:
https://grabcad.com/library/wobbless-x-mounts-1

Update Jan 2016:
bushed_8mm_no_bending_pro_screw.STL is part of a big retrofit I'm doing on my Prusa I2. It was abandoned, now it's getting PRO, with a great new innovation, stay tuned!

Instructions

Please use latest versions, check upload date! First versions can have a slack on M8 nut cases.
Should works just fine on latest Slic3r versions for 0.35mm nozzles.
I printed with 0.28mm layer, 2 perimeters, 50% infill
For extrusion width over 0.4mm springs may get weak.
Must be ABS, PLA spring wont work

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I'm using a 0.4 nozzle. He mode has 0.8 walls. So I assume you only printed to 0.7 thick and I did 0.8? If you don't mind can you measure the thickness you actually had on your parts ?

my part have ~0.85mm walls

Thanks I got a bit more. 0.90-0.95. I will need to adjust my flow. thanks for checking

Thanks for your response. I printed the piece at 50% ABS and seems to be extremely stiff radially, which you don't want. Are the ones you use really hard to move radially? I currently use some sliders with teflon and these are probably way much more but I was looking for axial constraint. Thanks again

You must be able to notice a slight movement in the damper when you apply radial force with your hands. ABS will work, the infill won't change stiffness because the damper is made of a thin wall. What is your nozzle output diameter? I made this with 0.35mm. You can try in your slicer a smaller extrusion width to make the spring softer.

Great idea! Do you have a picture of the before and after the hack? Thanks

Sorry, I don't. It makes a long time. But you can compare this part printed photos (black parts) with the first version, here: http://www.thingiverse.com/thing:33053
Zoon in the green parts, printed without the hack, you will see a great wooble. With the hack its all gone.
I used the green parts to print the black ones.

Wobbless X Mounts for MakerGear Prusa
by odudex

"Must be ABS, PLA spring wont work"

Nylon? Have you tested the PLA too?

thanks :)

Renato, I did not teste PLA, i just believe it would not work because it is much less flexible. But you can try it. Maybe modifying the part or even change print parameters as "extrusion width" you could make it work. You can print the spring separately to make tests.

thanks, i tried also to make it in nylon.. but to me is too flexibile.

Yes Nylon will be too flexible, probably the hole part will bend. When you test your springs try to move the center up and down. If it bends with a force less than your Z axis static friction, it may cause problems as variations in layer width. Good luck

yes, i made a test :) Thanks

There seems to be no hole for the 8mm rods to go through on these models.

Jim, must drill this hole after print. it's closed so the part can use the bridge feature instead of support material in that region.

Thank you much!

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