Excessive filament feed when resuming print after pause.
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I have a problem where the extruder feeds about 20mm of filament when I resume printing after pausing to change filament. I have an Ender 3 v2 printer with BLTouch.
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Check your resume after pause gcode snippet. I also have found that its better to manually insert the filament when changing and put a piece of paper on your print and have a brass bristle brush handy to clean the nozzle before hitting resume