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Is it possible? Yes. And you've mentioned stability could be an issue. I'll add that if you count your time and wasted plastics to test the thickness, infill, etc. I think it'll cost more than just buying the extrusion.
That said, if you already have core xy printer, you can start testing by replacing the frame with a printed parts. Starts with the vertical ones.
You can never get to "fully 3d printed" unless you can print metal, and even then the tolerances just aren't there yet.
But if you want a 3d printer that's as 3d printed as it can get, why not look at things that were designed for it, like Rook or Mulbot or The 100?
Very cool as a concept but not realistic for longevity. Parts deform over time. Also heat is a mature issue.
Parts deform over time
Just print new ones. /s
The extrusions are not the expensive parts… in fact, JLCPCB has them for ~$20.
I agree, its not even worth to try imo. Frame geometry is super important. Even extrusions can be painfull if they are not cut well enough. If you want the best result you should mill them (instead of cutting them with a saw).
3D printer tolerances are far from acceptable and then every material shrinks differently (+ there are many other disadvantages).
On the other hand, prusa and voron are examples of great use of 3D printed parts where you benefit from flex. Its a brave design decision that works amazingly well, but they can barelly print first layer without ABL or simmilar. Yeah...ABL compensates for shitty tolerances and we end up with bent 3D printed part that counts as perfect print lol
They're the most expensive part I need to source. I already have a majority of the other parts in the form of my current printer, really I only need a few more lead screws, stepper motors, and maybe a new controller if I can't figure out how to get the one I have working with that many steppers. The extrusions make up ~2/3 the expenses of this conversion, hence the question haha
$20 is 2/3 of your expenses?
https://jlcmc.com/product/s/T04/TXLB/voron-aluminum-profile-frame-2.4-3d-printing
Just as a heads up, in case you ever wanted to order these (or anyone else is viewing this post and is looking to source extrusions), the price for the frame is around $20, the cost for shipping to the US is around $110.
Sorry about that, I didn’t see that.
It's all good. I think there might be some sort of import fee specific to this type of item, most of the Chinese vendors have them for $30-50 with $100+ shipping.
There is a listing on Amazon that's around $85 after one of those coupon things, with free shipping. Seems to be the best deal I can find.
~~If I'm not mistaken those are prices per extrusion? There's multiple lengths that are needed, I don't think one part number is representative of the entire frame, but I could be reading it wrong. I looked at this same page when I saw your comment this morning~~
Edit: sorry, I was indeed looking at the site wrong. That's actually incredibly useful information, thank you so much for this link! The cheapest place I'd seen so far I was looking at ~$150 for the full set.
Here is an alternative Piped link(s):
https://piped.video/zI8OgRRF5d8
Piped is a privacy-respecting open-source alternative frontend to YouTube.
I'm open-source; check me out at GitHub.