Ender 3 v2 Printing Issues - Overhang, how much is too much?

[lokester 0]

New user with 3D printers.  Creality Ender 3 v2 with heated magnetic bed, auto leveling. Latest Marlin FW. Also have OctoPi interface via Raspberry Pi.  Using Cura 5.5.0 for my slicer and then typically utilize the "Print with OctaPrint" option.   Using PLA+ filament.   Bed temp 60C and nozzle temp 200-210C.  I am currently trying to print a small cylindrical  object that has a couple of overhangs where the outside diameter increases.  My printer is having issues navigating these overhangs and strings material all over the place.  I have tried increasing temperature to 210C, slowing down (both "speed" and "print speed") to 50% at these layers but nothing helps.  I have had similar results on other print projects where the material has to span from one side to the other.   Attached is a screenshot of my project in Cura as well as two pics of my results.  The lowest overhang is less than 3mm radially and the upper overhang is 5mm radially.  Are either of these overhangs enough to require "supports"?

[Dustin 129]

rule of thumb only 45degree anything more needs supports.. but you can go further pending your printers configuration and cooling abilities etc.

also purely flat surfaces like this yes always needs supports.

[gr5 2,173]

You can go horizontal like this for one nozzle width as well.  That's typically .4mm.  And you can "bridge" across long gaps.  google "3d printing bridging".

 

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Are either of these overhangs enough to require "supports"?

The bigger overhang definitely needs supports.  As you have discovered.  The support only has to support the outer edge of the rim as it can bridge in between (refer to "bridge" earlier in this post).

 

Usually I can design the part to have 45 degree angles under the overhangs.  Not always.  Sometimes I flip the part over to a new orientation.  Sometimes I divide the part into 2 parts and screw or glue them together.

[lokester 0]

Wow, guess I been pulling my hair out for nothing.  So I guess it is time I start playing around with supports.

 

Thanks to both of you for you replies.