[1.2.9] autospeed perimeter underextrusion, especially on short segments

[m0n5t3r]

Another edit: using the released 1.2.9 version on Ubuntu 15.04, packages here: https://launchpad.net/~iacobs/+archive/ubuntu/cnc/

With the attached config (3 perimeters, forced 100% default extrusion width to avoid #2960 or maybe #3082 - I was getting pretty ugly blobs on vertical surfaces and rough horizontal surfaces, 5% 3D honeycomb infill - this might be material for another issue, btw: if you set the extrusion width to 100% instead of auto, infill becomes ridiculously dense), I am getting:

tops of vertical walls mostly decent, but underextruded in some places

perfect surface on large horizontal planes (no, really, it feels like paper and I had to put that M3 nut in there because the camera wouldn't focus)

vertical surfaces look somewhat underextruded where normal infill is used, and comically bad where Slic3r decided to use solid infill, either due to voodoo reasons (first) or because it's a thin wall:

edit: after some fighting with github (it doesn't like STL, gcode, ini, even when I put them in a zip file), I renamed everything to .txt

config.txt spherebot-box.gcode.txt spherebot-box.stl.txt

[curiouspl2]

try reducing max print speed to something reasonable like 50. top/bottom solid fill uses less material on default settings (smaller extrusion width) so it's probably reason why you get such large mismatch. top/solid infill should get slightly bumpy (and actually there is no way to tweak this for your liking) with 1.2.9 internal settings.

does this problem occur only when on autospeed btw?