print quality - What causes ripples on part of first layer? - 3D Printing Stack Exchange

I'm having issues with ripples on the first layer of big flat prints. The initial corner of a big flat print is fine, but then ripples begin to form as shown in the screenshot. I'm just a newbie

print quality - What causes ripples on part of first layer? - 3D Printing Stack Exchange

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3D Printing First Layer Ripples: How to Smooth It - First Layer Problem

3D Printing First Layer Ripples: How to Smooth It - First Layer Problem

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anyone know what causes this ripple on my first layer? : r/3Dprinting

print quality - What causes ripples on part of first layer? - 3D Printing Stack Exchange

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What is causing these ripples in my top layer? Stock mk3s+ with prusa gray filament : r/prusa3d