Printing small details without melting them

[Jimustanguitar]

I'm printing in ABS, and I'm getting nice parts except for where there are small details and overhangs. If you're not supposed to use a layer fan on ABS, how can I print them so that I get better results? I'm running the bed at 80, and the hot-end at 210. Speed is the "stock" 30 with no manual multiplier. Minimum layer time is 30s.

Look at the gator's teeth

[img]http://i.imgur.com/ZmZ17Gj.png[/img]

And the tips of the owl's feathers

[img]http://i.imgur.com/lGy4CvP.png[/img]

[mhackney]

You can certainly use a layer fan on ABS - it all comes down to part geometry, fill, etc. I wouldn't hesitate to run a fan on these parts. However, my experience has been with a 25mm fan layer on the table blowing across the part gently. That might warm the air slightly. I haven't tried parts in ABS with my new cage - duct fan mounted on the effector.

[jmpreuss]

I did the same owl a while ago in pla and had the exact same thing on the feathers so I think that is a model issue (in my case I just picked them off, didn't effect the look of the print).

[Jimustanguitar]

The owl has 0 infill (an intentional overhang, cooling, bridging, and retraction test), so the feathers probably would have turned out nicer if the perimeters had that extra "infill time" to cool between layers.

Full size croc http://www.thingiverse.com/thing:129046 with .1 infill and http://www.thingiverse.com/thing:18271 owl at 75% with 0 fill, if you're curious about either of the model files.