PLA and layer adhesion

[curious aardvark]

From my very limited experience, PLA is more brittle than ABS. Perhaps its that aspect that is at play here?

how ?
I'm not hitting the parts with a hammer :0)

It's actually more a case of vacumn adhesion versus actual grabbing adhesion.

Things stick to flat tapes and glass mainly because of vacumn adhesion. Whereas bluetape supplies a rough surface that the plastic penetrates and bonds into. Likewise the vinyl in hairspray gives active grab.
I don't have glass - I have aluminium and when I get round to making swappable plates, I will definitely be trying the hairspray thing. Just not right now :-)

So I think my next attempt will be back with blue tape. Never had anything detach from that while printing.

***

right. Going for overkill. heated blue tape and a real tight calibration.
Applied the tape with the bed heated as well for extra stick.
Also decided to do one piece at a time.
And back to makerware - the infill i got from s3d was just woeful, even with boosted width and this thing needs to take some real weight.