Horizontal holes  

holes

What problem are you having with the holes?

From the picture I think this should be printing fine? Maybe some sagging but should be functional.

concur

Posted by: @fuchsr

From the picture I think this should be printing fine? Maybe some sagging but should be functional.

I agree.  

...

Hello. Thanks for your answer.

It is 0.20 quality.

What do you mean with:

Maybe some sagging but should be functional.

holes

Posted by: @tonino-2

Hello. Thanks for your answer.

It is 0.20 quality.

 

What do you mean with:

Maybe some sagging but should be functional.

That means that the top of the hole may sag a little but the print should still be usable.  I have often had to use a drill but to clean the hole but it still works.  

@tonino-2

Every time you print a hole (in vertical position) the upper most end of the hole will have no support from below (indicated by the blue color in the slicer preview). The printer will try to bridge this area and will usually do a good job but sometimes it can lead to some sagging, i.e., the filament going across that gap will droop a bit. Couple of ways to address it. One is to use supports inside the hole, which need to be removed later. Or you can design the hole in such a way that it is actually shaped like a tear, with a small peak on top that will offset the sagging.

But in most cases I found the holes to be perfectly fine, with the occasional need for taking a drill bit to them as @cwbullet suggested.