I have had the same issue with ASA on the X1C. Layer adhesion is very weak. I have tried lowering speed, lowering cooling, increasing temperature. No luck yet with the X1C but It has not been a methodical approach yet. I am building a small layer adhesion tester (smaller but similar to MyTechFun and CNCKitchen). This is primarily for layer tests for support interface layer between various materials but I hope to improve my ASA setting too.
Oddly the Ender 3V2 with a BIQU H2 Revo hot end prints ASA better so I need to figure out why.
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