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Prusa MMU2 selector mod

by jltx Nov 6, 2018
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Could you please add a chamfer around the filament input, and a slot for the magnet to hold the finda ball down on the selector please? if you can add that it would be perfect in my eyes.

P.S. love your work

someone did a remix that added the magnet and more. check out the remix link above.

thank you very much!

Looking forward to trying this! I wanted to point out that I just assembled the X.1 model and, even firmly screwed down, the razor blade fell out easily. I recommend sticking with the official depth.

In slic3r, you can just cut off the top layer, say 0.2mm, to achieve the same effect.

Thanks for the tip. I just put a small sticker beneath the razor and it's doing fine. :)

This is fantastic, just what I need! I find filament gets caught just after finda which results in air being printed! I am going to give this a go! Thanks.

Your "Handy tip" may not work with the new MMU firmware. From what I've read, it now has steps for dealing with filament in the path on reset. It may be fine as the MMU won't be able to clear the path and will eventually error out, but it might take longer to realize there is an intractable problem with the MMU.

Thanks for the heads up. I will check that out when I update.

Excellent JLTX however can I ask does it require supports I can print it on s3d or slic3r so variable options with supports would be fine if needed

no supports needed.

if you design a air inlet for the clean out for the FINDA then you could insert a tube to a compressed air Can and blow out the junk during a print. have it blow right out the windows.

I like the idea. I actually leave the blade and it's cover off now. It doesn't do anything, and if you don't sit it perfectly it can scrape causing the selector to not move properly.

You can do that. This prints a bit cleaner such that aligning the blade correctly is easier. There is alternative fw out there that is using the blade, so I’ve left mine in. Either way, definitely give this mod a try. I’ve found it incredibly helpful.

So far so good. Of course I didn't use the manual at all and probably could have read the bit about watch out for the blade... But all's well and it's working fine. I touched the inlet and outlet with a tool to smooth them out a bit further.

If you didn't already, may I also suggest making the blade notch a few layers deeper so it actually stays in, unlike the Prusa version.

Print it and let me know. My print came out better than the one from Prusa with a more well-defined blade notch. They may have already fixed that in the scad they published.

It's better than the one they shipped me, but could still be better if made a layer or two deeper.

you don't want it too deep. Just enough to catch the edge to align the blade properly. If too deep the clamp won't exert enough pressure to hold it well and it could fall out with all the vibration.