I would like some advice on overhangs.

I would like some advice on overhangs.

I’ve tried printing this model from thingiverse:
http://www.thingiverse.com/thing:1220231 and it does not turn out very well.

I’ve tried printing it at 190Deg with PLA, and Fan running 100% (half the fan points to the heatbreak, and the other half on the model).

The problem is that the bottom sides (with supports on CURA), are terrible.

It seems it’s melting too much and hanging.

Any advice on how to fix overhang issues. The problem is especially evident when printing anything which is spherical. The bottom half of the looks like an old wrinkled lady, whereas the top half is as smooth as a baby’s bottom.

I would be greatful for any advice

Cura’s support algorithm isn’t very good for bottom surface quality. When I want to print something like this, I switch to MatterControl. Their slicer (MatterSlice) is largely based on CuraEngine, but their support algorithm includes interface layers that, when properly configured for your printer, can result in bottom surfaces that look almost as good as the top surfaces.

For better PLA prints I use also additional area cooler (see my tip at http://www.thingiverse.com/thing:901746). I have also switched to Simplify3D because of better supports and g-code generator. Try to master your overhangs first for nice 60° angle (or better) with the test model from Make (http://www.thingiverse.com/thing:533472 – model for testing different angles of overhangs).

Any advice for Slic3r or CURA?
Any chance you can slice this model on Simplyfy3D, and send that to me for a test?

I haven’t used MatterControl. I will try it out. I prefer open source :slight_smile:

@Panayiotis_Savva MatterControl is opensource:

Slic3r also does interface layers, though I was actually getting better support performance with it (with ABS at least) before the rewrite of the support algorithm to include them.

Have you also played with your temperatures? The cooler you can extrude, the better for overhamgs, as long as you don’t mess up elsewhere.