kmanstudios 1,120
With a high quality PLA 60 deg should not be an issue unsupported on an UM3. It even works on an UM2+ which has a bit less cooling power due to the different type of fans. Just make sure you have 100% of the cooling power available. And be aware that the most of the cooling comes from the left and from the right (a bit more from the left if you use the left printcore slot).
If you have not yet done so you might want to use a higher layer thickness. 0.15mm gives walls almost as nice as 0.1mm but take much less time to print.
Adding to this (Which is spot on), I suggest that when you have time, print some overhang tests such as these:
I printed this one and
All of them have different conditions such as some are thinner and will bounce more, etc. But I found that I can print up to about 65° without issues on the underside. After that, it starts to have underside issues.
If the underside is not visible, then I found a decent top surface with an 80° overhang. Bridging would be a separate issue.
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Dim3nsioneer 558
With a high quality PLA 60 deg should not be an issue unsupported on an UM3. It even works on an UM2+ which has a bit less cooling power due to the different type of fans. Just make sure you have 100% of the cooling power available. And be aware that the most of the cooling comes from the left and from the right (a bit more from the left if you use the left printcore slot).
If you have not yet done so you might want to use a higher layer thickness. 0.15mm gives walls almost as nice as 0.1mm but take much less time to print.
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