Well, im back with my nylon "bridge" as PCTPE not yet received.
I don't know why, but it work better with "Z-GLASS" than Z-ABS or Ultrat, the glass parameter is the only one able to finish the raft.
then, if you want to print more than the raft
, once again i don't know why, but it works better if you increase the temperature about 10 to 20 deg.
On attached pictures i share you my experience, on the 3rd picture, you can see difference between +20° (bottom) ans +10°C (top).
+20°c : the wire never stop coming
+10°c : once printing stoped at half, but maybe it is because i forgot to turn the fan on 0 ?
the result at +10° is not so bad, and i can't brake the printed part (5mm thickness) by hands.
i will try it on more complicated piece tomorrow !
EDIT : I just tried, but as the bed doesn't heat, the raft unstick from the bed. (even if Z-mon on "3")