First layer issues

To get a nice first layer speed can be reduced (30%-50%)and temperature increased +5°C (while Fan is off). The first layer should be printed a bit thick and fat to be tolerant to a not perfectly leveled or flat bed and to stick well.

When scratching with the fingernail over the first layer (the side that touches the bed) then no profile should be felt. PLA can even be so flat that it reflects light like a mirror and no structure or the filament strings can be observed. If a profile can be felt too little material came out of the extruder or the gap between extruder and bed was to high.

If everything goes well PLA sticks hardly on the bed and it is wise to wait until the bed has cooled down to remove it.

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