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Dual Carriage for Qu-BD extruders

by julienM, published

Dual Carriage for Qu-BD extruders by julienM Jan 13, 2013
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Summary

For a new printer I am designing, the goal was to make the machine look more like a consumer good. I'm very happy with the quality of my Prusa, but it does look very functional.

Vents on the side pass the air coming out of the heatsinks down to the parts printing. This was designed for two Qu-BD extruders. Those heatsinks pass the air sideways only. Tests with a flame showed a lot of air getting to the bottom.

Instructions

At the moment, this is printed without any bearings, just 8.2 mm holes in the PLA. It seems to ride very well on the bars. The bronze bushings seemed to seize up. They have very low tolerances.

The semicircular ends are a design consideration for the new printer.

I will update, once the wiring on the printer is finished and the first print runs completed. A version with Lm8uu bearings will also be made.

The digital files for the extruder, used for presentation purposes, are from http://www.thingiverse.com/thing:39299.

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Hello julienM, I was looking for this for a few days, so happy I found it ! Do you know if this will work also with a Mendelmax 1.5 ( the size between the bearing). And is this a version that you can put the bearings inside ? Did you have any problems with it melting due to the heat dissipation? Thanks !!:)

WOW... This look's great... I'm going to have a try at printing it today.. Looks to take about 5 hours total to print with supports. I'm thinking 0.25mm layers with about 50% infill to start..
Post when I'm done..
Cheers,
Matt

Hey with which software did you design it? Is it possible to get the source file?
Looks really good and I was searching for a similar design since weeks.

I've uploaded the SolidForks file. It's a bit messy after so many changes.

Tried to print. Got about 50% done when the printer just stopped, everything still at temperature but the LCD at the home menu like a completed print. I'm guessing it was a bad S3G file, and will try slicing it again.

That's sad to hear. I imagine that that is a pain most Reprapers know. Luckily mine now prints pretty consistently.

The part here is actually the 5th iteration, before everything would fit as desired. I'm very anxious to know whether it works for other people.

I got enough of the print done to determine it isn't quite right for my needs. I'm hoping to see the LM8UU version soon. :) Otherwise, I was able to test fit the Qu-BD plate and it fits great. I may be able to tweak the model for the LM8UUs myself, though I'm still working on the design skills. Otherwise great model!!

There's an LM8UU Version posted now. It's just friction fit, but I've had good experiences with that. I can't guarantee anything yet, may well print it tomorrow to see.

Go figure. I was just going to post my lm8uu version and decided to check here. I'll post anyway (as a derivative, of course) - I suspect your model is likely much better. I kinda "made" it work. I'll post the thing # here in a few.

Here's a link to my posting. http://www.thingiverse.com/thing:45308http://www.thingiverse.com/thi... So far it seems to fit well enough on my Prusa. Will need to wire up the electronics again and try it out.

Prusa LM8UU Carriage for Qu-BD extruders

On the contrary. I didn't get to print it yet and I am not yet sure how its gonna go.The version with the bronze bushings was disapointing.

I really like this model! I would love to get my hands on the model with the bearings. I am not the best designer myself in order to redesign this. ; )

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