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Testing focuses on several details: precision dimensions, precision winding and print quality. The winding precision is a visual test where I check that the philometer would manage well on the coil, without any cross-sinks that can cause the power during printing.
The print quality is done using the CNET calibration test I use to test all 3D printers I view. When checking the quality thread, I am looking for a noticeable roughness and the missing threads in which moisture or other contaminants interrupted the melting and cooling process.
The dimensional accuracy is perhaps the most important test because it measures consistency or. While moving, and the filament changes diameter and will cause a 3D printer over or sub-podstrana threads. This creates noticeable scars in your model or even worse, complete failure. You want material to have the same diameter full time.
In order to measure the accuracy, a 5-meter (16.4-foot) filometer from the beginning, middle and end of the roll and measures diameter to four equally distributed points. Then all these measurements and shared a total of 12 – total number of measurements – to give me an average over the roll. Most modern printers use 1.75 mm filament, so you want to or be as close as possible.
The excellent filament has a variance plus or minus 0.02 mm, a good philament is plus or minus 0.03 mm and a rough filament is all plus or minus 0.05 mm. All the filaments that we have recommended here are at least 0.03 mm at least 0.03 mm.
