help with print defect
Hello
I printed a desk organizer and I am having some print defects on the drawers:
They are worst at the back of the printplate.
Did anybody elese encounter this? What could be the problem?
Material is Prusa PLA ( not prusament ), printer is Core One .
Used standard printing profile. Just raised the print bed temperature and increased the number of walls.
Could increasing the number of walls cause this? I think I remember encountering this issue on ASA...
Thank you in advance for your help.
Best Answer by chip_r:
As Diem has suggested, substitute with chamfers and it will be much better. As a habit, I look out for the "blue overhang perimeters" as shown in the legend here with the slicer. Besides curved bottoms, I've inadvertently created steep angles elsewhere in my prints that weren't immediately obvious.
At the top of your slots, the slicer is showing small blue dots. These are always fine unsupported because the overhang material is minimal. Basically, I watch for the amount of "blue" and decide how best to handle.
Clicking on the legend items, you can toggle feature visibility on/off. Helpful as some overhangs are very small and obscured.
For your print, I enabled supports. It illustrates what Diem mentioned. Really no space for supports along the base.
Click to expand.
I suspect this is a failed attempt to print in mid air ...
Please save your project as a .3mf file
Files > Save Project as
Zip the .3mf and post it here. It will contain both your part and your settings for us to diagnose.
Cheerio,
RE: help with print defect
Hi mate.
Here it is: obj_6_Schublade
If it were to be in mid air than why isn't it the same on the entire length of the part?
Why it can be seen only at the back of the object?
RE: help with print defect
Hard to tell without the project file, but it looks like a chamfered edge so maybe an unsupported overhang?
RE: help with print defect
I have attached the project file
RE: help with print defect
The bottom edge looks like it is rounded, and that is the whole problem. And if it is the bottom edge of the drawers, which is not actually visible, then there is nothing to solve! Unfortunately, many people think that 3D printing is the same as injection molding, and then it looks like this.
As suspected: Curves rising from the base cannot be supported properly where there is no space for a support structure underneath and the overhang is extreme. The issue will vary a little around the part depending on the direction of cooling air flow but you can't print in mid air.
Substitute chamfers for the curves, 45° should work OK here.
Cheerio,
RE: help with print defect
As Diem has suggested, substitute with chamfers and it will be much better. As a habit, I look out for the "blue overhang perimeters" as shown in the legend here with the slicer. Besides curved bottoms, I've inadvertently created steep angles elsewhere in my prints that weren't immediately obvious.
At the top of your slots, the slicer is showing small blue dots. These are always fine unsupported because the overhang material is minimal. Basically, I watch for the amount of "blue" and decide how best to handle.
Clicking on the legend items, you can toggle feature visibility on/off. Helpful as some overhangs are very small and obscured.
For your print, I enabled supports. It illustrates what Diem mentioned. Really no space for supports along the base.
Click to expand.
RE: help with print defect
Ok guys, thanks for your input.
I will try to take these unde consideration at next print.
RE: help with print defect
re: Why it can be seen only at the back of the object?
I've knowingly broke some best practices on prints to see how far it can be pushed. You often get mixed results with front/back/top/bottom differences in the same print. One can try to sort it out with slicer settings, but it can drive you crazy.
A rule of thumb I've learned to sort out first-order concerns first. Fighting second and maybe third order effects are never fun. Too many variables.
For the first few months of ownership, I learned a lot with intentional rule breaking (speed, overhangs, odd geometry, extrusion multiplier, drying, belt tension, etc, etc). Being able to recognize the cause/effect on my C1 helped me. OK, I still do "hold my beer" prints on occasion and mostly impressed that it wasn't as bad as expected.