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Posted · noisy surface of UMO print

It is the bottom of a small bowl print. The printing surface has half smooth and half rough. The leveling has been calibrated. Which part should I check ?

material:PLA, speed:50, temp:220C

 

IMAG2084

 

and this is half speed and temp:210C. The rough area got spread all around but lightly reduced.

IMAG2091

It is a small mug print. It also has noisy surface problem. It always happens on the area close to the hand hold. Could it be the side affect of retraction?

IMAG2085

 

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    Posted · noisy surface of UMO print

    For your first picture, that is most definitely due to the fan being only on one side of your print head. The splotchy side is not receiving any cooling so it droops more.

    You can solve this one a few ways, make a small rectangle or any shape beside your main bowl about 5 cm to the right and 'print at the same time'. This will make the fan move over to the right side to print the square to ensure that that side receives some cooling. But you will be wasting a little bit of plastic on the rectangle.

    You should also try lowering your temperature which may help with problem 2. 220 is pretty high for PLA. For the little splotchies, that's usually due to a bit of oozing before it goes to the next Z level. You can try increasing the retraction speed and distance a tiny bit. Again lower the temperature may help the oozing.

     

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    Posted · noisy surface of UMO print

    that's the down side of single sided cooling, try a different fan shroud or adding a second. the shroud on the umo is a very common problem, one that has been addressed by the community as a whole. for shee dependable cooling i go with gijs's v2 shroud and the right side counterpart to it, both are on thingiverse (sorry on a rush can't go find them atm, but you should be able to find them). but look around, as Ms. Frizzle would say "It's time to take chances, make mistakes, and get messy!"

     

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