I just came to the conclusion that this printer( and all others) should have a filament diameter measuring device inline that continuously measures the diameter of the filament and adjusts the output accordingly. I have had great problems until I found out that the diameter varied extremely ( up to 0.2mm! -> makes around 27% less material..). Since every filament manufacturer varies and even rolls vary over length I think this is a must, especially for home 3D printers where people use all kinds of rolls.
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