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MMU2 Horizontal Mounting Bracket

by zcubed Sep 30, 2018
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Did you have to reduce the max z height in the firmware, or just in slic3r?

A change in the slicer is fine or you can keep an eye out on your models height. No firmware changes needed since the z axis is unaffected, its just the bowden tube that can't handle the lower position.

What infill percentage did you use and what material? I think my PETG is a bit old as it keeps snapping apart at the hook on the frame. Did at 10% (forgot to change it) and again at 50%.

EDIT: Printing the 180mm version

I used PLA but printed with 4 perimeters and 20% gyroid infill

Well, even with the 180 version it is too tall for my enclosure by a couple millimeters. :( Going to have to think about what to do next. Thanks for the work on this.

For some reason the 180 version is too tall for my enclosure also. I see in the pic he has a few inches of clearance. I have the standard Lack tables. Strange.

Clearance will be determined by the part you use to connect the top table to the one the printer is on. I'm guessing we both used ones that were a bit shorter than the one zcubed used. I went ahead and mounted it on the outside. Figured it would be better to keep the MMU out of the enclosure when I print ABS. No need to subject it to the heat if it doesn't have to be.

There's a few Lack leg extensions around thinigiverse you should look into but keep in mind most will need bigger side panels.

This was going to be in an enclosure to print ABS with so PLA wasn't going to work based on my past experience. I was finally able to get two working, but might go back and reprint with more perimeters. Thanks.

Using the passtrough as you mentioned TAKES some length, not adding it.

I think I would like to see a set where the device faces down instead of up or flat. Won't do you any good with your enclosure, but it seems like it would be a lot easier to work on in general that way.

Compared to the included MMU cover the passthrough reduces the length since you no longer need to short ptfe tube before the gears. Facing down could work if you have wall mounted spools but you would need to move the MMU unit much higher to maintain Z height.

Yep, we both have alternatively mounted spools.

I mean the length between the MMU and the print head when first homing is too far - there's not enough slack. Or there is just, but it pulls.Your mounting lowers the PTFE quite a bit to make up for it. For those without, it's pretty snug.