Strange behaviour on the first layer

The Print attached is the base layer of a rectangle that should be filled for the first layer.



Problem is, the border sticks very well to the bed as the print begins. The infill doesn't; it warps outward instead.

I changed Temperature from 185°C to 175°C during the last half of the layer (lower left corner). The bed temperature was set to 60°C material is PLA 0.4mm first layer hight.

Looks like your nozzle is a little too high. The filament isn't being smooshed down onto the print bed properly.

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