PrusaSlicer: Print Speed

Print speed varies throughout a print. See Picture 1 and Picture 2 for the print speeds for the 0.20 mm Quality print profile for the MK3S. These settings can be found under Print Settings / Speed.

The fastest speeds are Infill and Solid Infill at 80 mm/s. Both of these should be non visible when the print finishes, and so don't need to look perfect.

Support Material, Top Solid Infill, and internal perimeters are all a bit slower, between 40 and 50 mm/s.

Bridges, External Perimeters and the First Layer are the slowest between 20 and 25 mm/s. Bridges are delicate, external perimeters heavily impact the aesthetic of the part, and the first layer adheres to the bed.

Prusa Slicer offers a Speed preview in sliced view. {Picture 3} The speeds shown in this preview match exactly the ones entered in the settings.

There is also an Actual Speed preview that will take into account acceleration. Adjusting the slicer speeds is often a troubleshooting step based off of a print failure, and this can be a useful tool for diagnosis.

There are two ways to adjust the speed during a print on the Prusa MK3S. Both will apply a percentage change to all speeds.

On the home screen in the middle of a print, simply turn the nob to adjust the speed.

Alternatively, press the knob in the middle of a print to get from the home screen to the settings screen, select Tune, select Speed, turn the knob to adjust the speed.

If a part appears to be struggling mid print, reducing the speed could help it resolve.

If the print needs to be completed quickly, upping the print speed to 200% - 300% can significantly reduce the print time. This can cause issues, so it is risky.

Slice a benchy to print as fast as possible on the Prusa MK3S. One chance, fastest time that passes the quality check wins.

All major features included.

No visible sagging or curling.

This video is of an 11 minute benchy! The fastest in the world is in the range of 1-2 minutes.