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MMU Nextruder mod tension screws  

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Alienbliep
(@alienbliep)
Eminent Member
MMU Nextruder mod tension screws

Goodday,

 

I installed an MMU3 on my core one.

Since the beginning i have trouble with the tension screws. Somehow the bite/scratch in the aluminum heatbreak.

At first i printed an other screw holder (right after the screwshead) that was shaved off 1 or 1.5mm. Because this holder was rubbing so hard the tensioner would not come back to its original poistion.

I added 0.1mm shims to avoid the heads being pulled in the plastic thingy because of temps. (other problem)

 

Today i check after a few mmu prints and there is a lot of metal shavings on the heatbreak.

When i undo the tensioner or bolts everything seem to run fine. I always press the bolt when i open tensioner and they seem to move freely.

 

Now i have altered the bolt threads so they don't act like an jigsay in the holes.

Now it is really smooth but....

 

this is not normal right??

 

This topic was modified 1 day ago by Alienbliep
Posted : 12/09/2025 5:51 pm
David R. Campbell
(@david-r-campbell)
Eminent Member
RE: MMU Nextruder mod tension screws

I would say yes, not normal.  I have the CORE One (assembled) with MMU3 (kit) and see no issues like this.

Posted by: @alienbliep

this is not normal right??

 

Posted : 12/09/2025 6:02 pm
Alienbliep
(@alienbliep)
Eminent Member
Topic starter answered:
RE: MMU Nextruder mod tension screws

Maybe my tensioner arm is too short?

So the bolts are not in line with the holes?

Posted : 12/09/2025 6:11 pm
Alienbliep
(@alienbliep)
Eminent Member
Topic starter answered:
RE: MMU Nextruder mod tension screws

I am sorry, i mean the swivel should be pointing up. Mine is pointing down

 

Posted : 12/09/2025 6:38 pm
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