Original Prusa i3 MK2S is a successor to Original Prusa i3 MK2 with small hardware tweaks for easier assembly and improved reliability.

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Replace cracked y-corner, fully assembled printer

Having never assembled anything more complicated than an IKEA shelf, I managed to crack the front-right y-corner. It's cracked at the top part, that's supposed to keep the smooth rod stable in the y-direction. The printer is fully assembled at this point.

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You can see traces from my failed attempt to glue the crack closed.

I am at this moment holding the crack closed with a custom designed part and it seems to be doing the job for now.

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But I'd like to fully replace the y-corner with a new 3d printed part. How can I do this? How extensively do I need to dissassemble the printer?

Also, what material should I use for the new part? Must it be ABS or is PLA ok too? I am asking because I have some orange PLA but no orange ABS.

Thanks, best regards!


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Hi Panos,

printable parts are posted on our site, just download the package, find appropriate STL file and print it.

Link: http://www.prusa3d.com/prusa-i3-printabl...

For the material choice, I recommend ABS, since PLA is not strong enough for long-term use.

Regarding the disassembly, cut zip ties in LCD holder and put it on the side. Cut zip tie holding the smooth rod, release the outer nuts and exchange the Y-corner. During the reassembly you need to ensure, the frame (Y-axis) won't be skewed.

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Never use PLA for a mechanical part. It is a completely incompetent material for mechanical components.

Use acetone and abs slurry to weld the part back together. Get an empty nail polish bottle and fill it mostly full with acetone. Add abs trimmings and let them dissolve. Paint this on your part and better than new.

You should never ever use anything else to glue ABS. Plain acetone works too but wont fill in gaps. I keep all kinds of colors of ABS glue around.

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Thanks for the anwer! I decided to go for the new ABS part, since I do have some ABS around (just the wrong color), but it's a very useful tip.


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Panos will be eternally grateful.
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