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Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!
jeepsterjc

Makergear X-Carriage with built-in fan mount and duct for cooling nozzle.

by jeepsterjc Jan 26, 2012
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What was this designed in? we might like to make a few tweaks if you'd be okay with that? Post up the design files for whichever platform you're using and we'll do the rest. We completely understand if you'd prefer not to as well.

Hello. Sorry it took so long for me to answer. Volunteer work for a week or so... I used Pro/E Student Edition at my school for the design. I'm sorry, but it won't save to too many other file types. Not even dxf. They want the work to remain in their product family and I can't blame them. Pro/E student version does save to slt, step, and iges so it is still awesomely useful for 3D printing.

What changes would you like? A student and I are redesigning the x-carraige right now with a raised extruder platform (3 cm) and including linear bearings and a repositioned ducted fan housing.

The goal is to allow an 11 cm print height using the http://hotend.comhotend.com hotend.

Thanks, Jim

Printed and installed.. then realised there are no belt clamps? Slots for them, yes, but not included or linked to... just sayin.. Otherwise it seems pretty solid!

No I didn't include the clamp bars as I assumed that as people were printing this out as a replacement they would re-use their old ones- I used the same dimensions that MakerGear uses so my old ones could be re-used.

I have a new fan-ducted x-carriage in prototype that is installed and working. It uses linear glides and raises the extruder body 3 full cm. :-D

I'll have it out next week. :)

Which bushings are these designed for?

Hello again. Are you having troubles? My bushings push in snugly with the bores @ 16mm. That is what they were drawn at in Pro/E. If you're having trouble pressing them in a hot air gun works wonders.

No troubles. I was just wondering if the bearings I have would fit into your model. They are Igus 16mm diameter x 25mm length linear bearings. Sounds like they'd fit diameter wise. I'll download the model and measure the other dimension. Thanks!

Oh, I see. You've got me curious now... :) I just bought 10x LM8UU 8mm Linear Ball Bearings off of ebay for
&
lt; $20.00. I'll see how I could redesign the carriage to take these linear glides. I've been wanting to spread out the bearings a bit farther to get the cantilevered motor CG loading more balanced between the 4 bearings, left to right.

I am using the stock MakerGear Prusa bushings. They are listed as "self-aligning, bronze, 5/16 for Hybrid".

Hmm maybe a better question: What are the bushing hole dimensions?

Nice design and speaking of airflow, I just finished fitting a relatively powerful

Sanyo 40mm ballbearing fan to Pomalins cone design that fits with clamps around

the cylinders of the x carriage. It works, but you lose pressure from squeezing the

air mass through a small hole. Hopefully enough to cool the nozzle effectively

when building small parts. Sfact (Skeinforge) has a feature called cool where you

can activate the fan depending on how long it takes to print one layer. Very cool!

Very nice design! If you have Replicatorg, you can re-orient it with that quite easily.

Hello. Thanks. :) I printed the x-carriage in my classroom but uploaded it to TV later from home... The last thing I do to check it out is use Replicatorg religiously before skeining it. Life got a lot easier when some kind sole suggest it!

You know, I think balancing the airflow between the nozzle duct and the e-motor duct will be difficult... Do you think a 40 mm fan has enough flow for the job??