This next puzzler was printed in PC-Max poly-carbonate on a Gigabot 3+ XLT with full enclosure (and some extra insulation). The smaller piece (top) was attached to the raft and support (bottom) at the top section of the raft. It popped off the raft mid print and the printer kept going giving a birds nest look. Why did the piece separate?
it looks like the separation between the support and the raft is not the right amount and because the part is held on a small area at the beginning it runs the risk of this to happen. Also it could be that the print speed is too fast
The raft separation distance was 0.10 mm where usually the PC raft separation is around 0.30mm, so it was closer than normal. There wasn't enough support to stabilize that section of the part and that helped it pop off, but that isn't the main problem. It was printed at 60mm/s with a 0.8mm nozzle and a mondo hot end. This is the normal print speed for this material and setup. Slowing prints down will usually help, but that isn't the root cause either.
Keep guessing!
my other guess is that needs a bit more retraction, maybe it deposited more plastic at some point where the nozzle or something in the head grabbed to and pulled dislodging the part
The printer has more of an issue with retraction and extra restart when layers are very small. The first layer or two after the raft could have been difficult for this print, but that printed without issue. The part popped off well after the point where retraction would cause the most issues. Take a closer look at the part that popped off.
the layers look really bad, so I am guessing maybe the extrusion multiplier is a bit to low for the speed or the hot end a little too cool?
Congrats, you got it! The hot end was set to 190C instead of the usual 250C for PC-Max poly-carbonate. The material heated enough to extrude, but not enough to adhere properly to the other traces.
Carlos Pozo please contact cat@re3d.org to claim your prize.