In my experience, if you print too fast, filament has too little time to melt (causing underextrusion), and the printer head's movements overshoot at corners (mechanical vibration), causing visible vertical banding ("ringing").
If you print too slow, the filament has too much time to melt (causing stringing), and the print head stays too long on the same spot and will melt the rest of that area too, causing visible deformation. You often see this when printing very small items (e.g. fine text).
So you need to find the optimum inbetween, for each material and each model.
Normally I use 50mm/s for standard models, and 25mm/s for very fine models, always 0.1mm layer height, PLA.
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krys 206
Hi there,
Generally slower printing produces better results, but the is a limit. It is possible to go too slow. The speed also depends on the material used. For PLA and most other common material, 50mm/s is good and 30mm/s is the most common slower speed I have seen used by others. For weird filaments like Ninjaflex, Woodfil, etc. the optimal speeds and any slower speeds can/will be very different. Temperature too can affect printing speed.
To me, 15mm/s for PLA seems *very* slow. I suspect you will get diminishing returns below 20mm/s. But that is just my impression. YMMV.
Conversely, printing faster than 50mm/s can give good results too, depending on how well you have calibrated your printer and the part you are printing. (and the material too, of course).
Anyway, hope this helps. Do some experimenting and see what happens.
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