Do I need supports to prevent this poor bridging? And how to speed up print?

[pleonard2000 0]

Hello,

 

I am just getting started with 3d printing so I'm not sure if bridging/drooping is the correct term.

 

Here's the finished part;

 

I used 1.75mm PLA+ at 210 deg with print speed of 50 mm/s and low quality .28mm layers

The cross pieces in the graphic are 1.6mm thick, and required about 5 layers.

 

It was printed without supports in this layout;

 

 

Here you can see the drooping that occurred on the underside of a couple of the bridges

 

 

So ... is this 'drooping'?

Should I have simply added supports to prevent this?

 

I previewed what the supports would look like, and not only did it seriously lengthen the time required to print, but they looked like they might be hard to remove.

 

I re-sliced it in highest quality mode, and the profile still looked similar so I didn't reprint it

 

 

 

So, I'd like to know the proper way to prevent this, and also whether you have any tips to speed up the print.

It took almost 4 hours at lowest quality and only 10% infill.

 

Thanks!

 

Having a great time so far!