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somerwil

Extruder coupling popping out of the wood

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Posted · Extruder coupling popping out of the wood

Hi guys,

it took a while to get this far but now my "quick fit coupling" as in the Ultimaker wiki (

http://wiki.ultimaker.com/Ultimaker_rev ... _mechanism

) finally popped out of the wood. :-) It's the plastic part on this picture making a (new) way through the wood upwards.

http://www.flickr.com/photos/ultimaker/5447118287/

I know this is a common issue and I know there are a few printable upgrades. Since I cannot print now these printable upgrades are not an option.

Any tips on an easy solution for this? This one (

http://www.thingiverse.com/thing:12125

) looks pretty strong but my wooden pieces look different from the one on the picture. When I dremel the wood bits to fit this military grade part I won't have enough wood left.

Thanks,

Michael

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Posted · Extruder coupling popping out of the wood

Your wooden pieces don't look the same as the military grade, because those are new cut parts by the design posted there.

I've seen a solution where there was just a screw inserted to hold the coupling in place. Sadly, I cannot remember the details nor do I have a picture.

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Posted · Extruder coupling popping out of the wood

You might be able to hold it down with cable ties while you print the other parts.

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Posted · Extruder coupling popping out of the wood

I tried the cable tie but that didn't work out. I drilled some extra holes to attach the ties to but they didn't hold... I'm thinking of a little aluminium block now which I can produce at work. The drawing is already on paper, can't wait to make it tomorrow and test it!

A little adjustment in the design is probably an easy and quick solution for new Ultimakers. A little bit of extra wood/ tighter fit for the coupling will do.

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Posted · Extruder coupling popping out of the wood

When I tried to print that part my coupling popped out again :-)

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Posted · Extruder coupling popping out of the wood

My first try was to get a piece of aluminium with a tapped hole to fit the coupling. Since the thread is NPTF it's difficult to find a tool to do that (at low cost and fast) so I ended up with new, 6mm lasercut steel sides on my assembly.

A bit of overkill but it works fine so far. It also seems the noise is reduced a little with the extruder mechanism now bullet proof. Not too sure about that one though...

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