Raft top bottom layers separating

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Joined: Mar 12 2018
Posts: 9
Raft top bottom layers separating

I'm trying rafts for the first time to print some large diameter (200mm) parts. I'm using 1 bottom layer and 2 top layers with 100% infill for the raft, but raft top layers are not adhering to the thick, bottom layers. It is as if the top layers are being printed too high above the bottom layers. The extrusion amount seems correct, but there is no adhesion. I think this is a bug in the software.

Please help.
I didn't find the right solution from the Internet.