Max Speed for Prusa Mini  

RE: Max Speed for Prusa Mini

I haven't seen any posted results indicating the maximum volumetric rate for the Prusa Mini hotend. The extruder capacity may also figure into the answer. Ultimately, "speed" is an illusion when you're talking about a 3D process. What you're doing is moving a volume of plastic through an extruder and hotend and out a nozzle. Both the hotend and extruder impose limits. The extruder can only feed filament so fast through the feed path, and the hotend can only melt and move so much plastic. How fast the nozzle moves linearly without exceeding those values depends on the extrusion width and layer height. This maximum volumetric rate (expressed as Maximum volumetric speed (MVS) in PrusaSlicer) also depends on the filament you're using. MVS = Layer Height X Extrusion Width X Speed.

Calculating your printer's maximum volumetric speed is straightforward, and I'd love to see results for a Mini. If we can establish the rate at which the Mini can process common filaments (PETG & PLA), it's easy to identify maximums for linear speeds that can be used with varying layer heights and extrusion widths. Finally, print quality comes into play. You want to produce decent looking parts with acceptable part strength, so staying well below your printer's maximum is often required.

RE: Max Speed for Prusa Mini

Posted by: @bobstro

 Finally, print quality comes into play. You want to produce decent looking parts with acceptable part strength, so staying well below your printer's maximum is often required.

Very often missed item. Layer bonding is getting worse with higher print speed. I made some tests on my MK2/MK3 trying to increase the output of the face shields.  It was interesting to see that you can produce with fast printing decent looking parts which will fail under mechanical stress very fast.