Odd first layer fill - 3D Printing / 3D Printers - Talk Manufacturing

My new PEI bed is working well and warp is a thing of the past, hurrah! However, as they say, I now have a new problem… Take a look at the bottom of this model: At first glance it looks like under-extrusion (doesn’t it?) but it’s not. There are parts of this surface that are totally smooth. There’s also a weird “pattern” to the holes, like the filament was “pulsing” rather than being delivered smoothly, but only in the centre of the print. Now take a look at these smaller parts: These ar

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