adhesion - FDM printer first layer infill swell upward - 3D Printing Stack Exchange

My Kossel Mini printer was working well. Recently I made some changes including replacing the nozzle and throat, adding a silicone heater cover. Now it has the problem of first layer adhesion. The

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slic3r - First layer - not even infill - 3D Printing Stack Exchange

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Very frustrating issues with first layer adhesion when printing

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First layer is always rough and looks scratched up : r/FixMyPrint

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