So I got a chance to put in a quick test print of the boss frame with nylon cf15.
Printing on glass coated with hairspray (via spraying into a towl and wiping it on) failed printing after ~25% as the print warped and lifted of the printbed.
Gave it a second go with a 5 outline brim and 90°C heatbed insead of 80°C and that ran through without issues - was also still quite sticky when the print completed (used a razor to remove the print).
Stringing was pretty much non existant and it printed much better than regular nylon in general (smooth consistant flow).
Also I opened the sealed package and immediately put it into a drybox container I built to print from it has a integrated spool holder and ptfe tube running out to feed the filament directly to the printer). Unlike Nylon it printed perfectly fine without the need to dry it beforehand.
I took my nylon settings as a base, (I use simplify3d btw):
- no retraction
- *coast at end 2mm
- *wipe distance 5mm
- outline overlap 30%
- infill extrusion width 200%
- 90°C bed temp (glass)
- 260°C hotend (microswiss)
- printed inside an enclosure with ~28° ambient temp
- 40 mm/s speed
- outline underspeed 60%
- solid infill underspeed at 80%
- I did go with 1.0 extrusion multiplier vs. 0.9 that I usually use with nylon, I might go up some more on that tho
- these I think can be tweaked some more as the cf15 nylon doesn’t appear to be as stringy as regular nylon.
- Seems to be virtually unbreakable, I was able to actually fold my failed 1.2mm tall first print attempt completely over. Releasing it left it at an ~ 45° angle (so from this __ to this = to this _\ if you get my ascii art I could just bend it back into shape tho without issue.
- Layerbonding excellent - no delamination noticed, unlike regular nylon which highly depends on the temperature (maybe I just got the temps right with the first try).
- Weight: Seems to weight the same as my ABS print, need to check again with a more accurate scale.
- Rigidity: Definitely stiffer than regular nylon, maybe a smidge less than ABS but I am only going by feel - seems to be very well suited for our purposes.
- Surface: a bit rough but kinda nice. So not super smooth like ABS prints.
- Dimensional accuracy - haven’t calibrated this yet but I wouldn’t expect any major shrinking or such.
I printed the 6mm boss tiny evo frame and I could actually bend the arm with 90° (resistance similiar to ABS) and just bend it back into shape without any breakage/stress marks or any visible affect on the frame.
I’ll print some more frames and also thicker 2"/3" ones later on. Personally I am super happy with this filament and I am looking forward to do some fly tests on a frame printed with it.
Maybe this will help you (or someone else) get a start on things
Quick update: I was able to break one arm by twisting it repeatedly but strangely not the others. I assume it has todo with the wipe/coast settings and can be tweaked.