# Nozzle scratching on second layer

I've been searching for hours for the reason why my Ender 3 Pro, after a perfect first layer, is scratching on the second layer and so on the next few, after that it normalizes and then prints normally.

I reduced the first layer height, but this gives other issues, changed bad and nozzle temperature.

Is there any possibility in PrusaSlicer to command the Z-stepper to go a little bit higher after the first layer?

• What do you mean by scratching on the second layer? Jul 21 at 12:35

If the nozzle is too close (if it touches the bed the filament flow will be hindered and you will hear a thumping noise) the filament flow may be too big so that the filament is thrusted upwards beside the nozzle (structure on the build late looks like a ploughed field). Filament is always over-extruded by the firmware in most slicers (Slic3r, on which PrusaSlicer is based, and e,g Cura do that), there are settings to reduce that, but these shouldn't be changed. You can look into increasing the first layer height a little, lift the whole print up (e.g. in Cura there is a plugin called Z Offset Setting by developer fieldOfView available in the marketplace), or redefine the height of the first layer in your start G-code.