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Z Axis Support for Prusa Air

by viresx, published

Z Axis Support for Prusa Air by viresx Nov 17, 2012

Description

I've always had problem with Z-axis that plastic couplers were falling down from motors. I designed this supports to hold Z axis and now I don't need to worry about height of extruder nozzle, because it's always the same.

Recent Comments

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Wow, this Jordan modifications looks very nice. Thanks :)

True, like I said in my other reaction also, I now have bought aluminum Z-couplings and will also be moving the steppers to the bottom like in the new Air Jordan design. Did you see it?

No, but I planned to design it specially for Prusa Air... However I don't have enough free time :(

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Instructions

1. Print two parts.
2. Get two 608 bearings, 2 M8 bolts and six M8 nuts
3. Mount it to your Prusa Air

Comments

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Ohmarinus on Apr 14, 2013 said:

Dang, my acrylic frame that I bought from a vendor doesn't have the gap on the side where it bolts to the frame!

I will try to modify it in sketchup, thanks for adding that file :)

viresx on Apr 14, 2013 said:

I removed this supports and bought metal couplers on Z axis. I had some wobble with this :(

skobalczyk on Dec 10, 2012 said:

Hi viresx,
Could you also upload the plastic feets that you have on your printer? Do they really help with the noise and vibrations.

viresx on Dec 10, 2012 said:

They really help with noise if you don't have any tablecloth. They are made of ABS to make wider, round surface and rubber foot (like this: one http://electropark.pl/akcesori.... I will upload it at weekend, becouse I have it on other PC.

thantik on Nov 17, 2012 said:

Bad idea.  This will introduce Z wobble in your prints unless you've got the absolute straightest of rods (you don't)

avalero on Nov 17, 2012 said:

With the flexible couplings he uses he does not have to worry. I also have those (in my Prusa Air) and there is no wobbling, as the coupling absorbs everything

viresx on Nov 17, 2012 said:

That's why I'm going to print new x-axis like in new Prusa. 
I don't know why all versions of x-axis designs use so many nuts - not-threaded rod should keep everything straight.
Threaded shaft should only hold correct height using 1 nut. 
I also have metal coupler on top to eliminate wobble and I can see it's not absolutely straight :D

Plattekerre on Nov 17, 2012 said:

This is great, i was just about to make something like this to try to minimize the wobble in the threaded shaft. Now I don't have to draw it myself.

viresx on Nov 17, 2012 said:

As "thantik" said, it's not going to minimize the wobble, if you don't have flexible metal couplings. It's only useful to keep it on correct height - these metal couplings can break if they are stretched for long time.

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