I am printing very dense brackets to use as part of a CNC. I chose PETG for its resiliency and stiffness, but no matter what I try, the corners warp upward and the part curls up. I have tried different printing surfaces like kapton tape and masking tape. I've tried with the bed heated at many different temps all the way to 110C, but the problem is that when the part cools it starts to curl. So even if it stays relatively flat during printing, it curls when the heat turns off. I recently tried printing with a brim and a raft, but it's curling right off of the 10-layer raft like it's nothing. I've included my settings in Slic3r for reference.
Capture3.jpgCapture4.jpgCapture.jpgCapture1.jpgCapture2.jpg