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UJF-3042 Y-belt replacement

kehall

Deficiency Debugger
Has anyone replaced the carriage (Y-belt) on their printer - the service manual doesn't discuss that particular topic so only have the mechanical drawings and printer in front of me to decide how best to proceed (belt has aged rubber and stripped teeth).

drawing.PNG

The issue is that the clamping plates that hold the belt to the head carriage assembly are attacked from behind the head assembly, so at the very least the linear encoder strip has to come out assuming could fabricate a small enough right angle JIS screwdriver to tease out the retaining screws, as also the main Y-bar (which supports the slider etc and through which the back of the belt passes) is in the way.

20240702_114832p.jpg 20240702_114816p.jpg

Could also remove the entire head assembly from the sliders but could be tricky getting the tension in the belt (probably have to remove one pulley, right hand side I guess). Alternatively the whole linear way could come out but risk upsetting the parallelism of it relative to the table etc or worse, a slight warp (and still have tension problems).

I'm erring towards removing the head slider base to the sliders (a couple of screws each slider, if I can get to them) and hope they're dowelled or otherwise fixed locations as to not upset head tilt.

Maybe I'm missing something obvious?
 
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balstestrat

Problem Solver
From what I'm seeing it looks like it has a quick latch mechanism so you just losen the belt tensioner and it pops off the stud.
 

kehall

Deficiency Debugger
From what I'm seeing it looks like it has a quick latch mechanism so you just losen the belt tensioner and it pops off the stud.

You know what, that may be the blindingly obvious thing I've missed! It looks like you could be right, thanks! :clapping:
 
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