Testing focuses on a few details: dimensional accuracy, the accuracy of the air and the quality of printing. Winding accuracy is a visual test where I can ensure that the filament works well in the spool, without a crossover that can cause the raid during printing.
Print quality is done using a CNET calibration test that I review and use all the 3D printers to test. When verifying for the quality of the filament, I am looking for noticeable roughness and missing filament where moisture or other contaminants have obstructed the process of melting and cooling.
Dimensional accuracy is probably the most important test because it measures the continuity of the filament. As you move as well as the filament varies in diameter and turns 3D printer into over-or under-e-expedted filaments. It creates significant stains in your model or makes the worse, complete failure. You want the material that is completely the same diameter.
To measure accuracy, I take a 5 meter (16.4-foot) filament from the start, medium and end, and measure the diameter at four equal gaps. I then add all these measurements and the total number of 12 – total measurements – not shared me for the average across the roll. Most modern printers use a 1.75mm filament, so you want the filament to be as close as possible.
Great filament has a variation of plus or minus 0.02 mm, good filament plus or minus 0.03 mm and some of the rough filament some plus or minus 0.05 mm. We recommend that all filaments are on average at least 0.03 mm on average.
