Why is the F306 default print speed 100mm/second?

This speed provides the best combination of great quality with good print times with common materials. Printing slower than this provides some increase in surface smoothness and small feature resolution, but for most parts it is not noticeable. Speeds up to 250mm/s still provide very good print quality, but some “artifacting” can be seen, particularly where the print head slows and accelerates in corners and other direction changes. Higher print speeds are less appropriate for very small parts since the deposited plastic needs sufficient time to cool.