I’ve encountered a strange and interesting directional adhesion asymmetry. Printing PLA at 195C on Kapton at 70C. I’d be interested in hearing about similar experiences.
Deltabot?
The closest I have ever had to something like this happened when my bed was not level.
I don’t see any clues in the photos.
If it consistently peels more from one side, I’d check the bed tram, the nozzle might not be the same distance from the plate at all points, being more out one side than another. Uneven air flow can do it too.
So…were those printed on a delta bot with the item in the center? What shape is the heated bed? one nozzle or two?
I’ve got a Felix 3.0, running one hot end. The bed is level within .002" or so across a 10x10" print area. Some photos of the bot and prints can be found here:
The suggestion that the hot end may not be perpendicular to the bed is interesting. I hadn’t considered that.
It is a cartesian style bot with a square heated bed, so the delta issues are not going to apply. Does your nozzle wiggle any? Is your heated bed flat when hot and when cool? Heated beds warp slightly when they heat up.
The way that the hot end is camped into the original Felix extruder assembly is not ideal, so it might be shifting in it’s mount. I’ll take a look at increasing the clamping force on it.