Today I tried Nylon+Carbon from http://www.eumakers.com/de/
Printed at the recommend 240Â°, and the result was pretty good. There are no layers visible, surface has a certain roughness, however should be a perfect base for any paint (if there is paint that sticks to Nylon). Printed with 0,14 layerheight, objects came out straight and true without any deformation.
The wall thickness of a single wall turned out to be ~0,66 mm, a bit more than the usual 0,6 mm. Layer bonding seems to suffer cause of the carbon, however still very good and outperforms any other material tested (except the pure Nylons, of course).
Nylon and Carbon can take much more heat, so I set the temp to 248Â° for a second print to improve layer adhesion. Reduced extruder flow by 3%, increased speed by 3% in order to get a thinner wall.
Interesting results: Also this material can warp :), one edge of the raft lifted a bit. Layer adhesion seemed to improve. Wall thickness, however, increased to 0,72 mm.
Am I right to assume that this is the result of the hotter, thus more liquid material? Actually I expected a thinner wall cause of the higher print speed and the reduced flow ratio.
And I still have troubles with stringing, on every seam there are short strings like the bristle of a tooth brush. Retract is already at the maximum of 2.
Any advice from the pros? :wacko: