I'm very new to 3D printing. I just got my rostock v2 max fully built last week. My first prints were fantastic, albeit simple. For example I printed this volleyball and was very pleased with the results:
http://i.imgur.com/eqNf9pT.jpg
I just printed this cellular lamp http://www.thingiverse.com/thing:19104
Fully aware that it would probably fail catastrophically due to the huge number of moves and retractions, as well as the very thin geometry and steep overhangs. Here is how it turned out:
http://i.imgur.com/AehGvJ6.jpg
http://i.imgur.com/TRt1blz.jpg
http://i.imgur.com/SWEcpyd.jpg
http://i.imgur.com/Kogp4kO.jpg


So there are 2 main problems:
1. The steep overhangs are printed poorly, there are a lot of drooping layers.
2. There are strands that form on upward diagonal angles (and I have no idea why).


I used the mattercontrol slicer. This print was with HatchBox gray 1.75 mm PLA. The layer thickness was set to .2 mm. The hot end was running at 210*C. The infil was set to %10.


What can I do to improve this print? I really have no idea what would cause the odd upwards strands to form. My best guess is something with the retraction settings are wrong. If you guys need any more information, just ask. Any advice is greatly appreciated.