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I have noticed that Slic3r offers a speed setting called "auto speed" meant to give a constant filament pressure at the extruder, which I believe could eliminate filament grinding issues at higher printing speeds.

According to the tooltip in Slic3r, auto speed is calculated from two parameters:

- Maximum speed
- Maximum volumetric speed

Maximum speed speaks for itself, but how can I calculate the maximum volumetric speed of my print?

You are right about the terms: I have updated the post to reflect this. I also found a blog post discussing the math in context of extrusion width, for those interested: http://www.extrudable.me/2013/11/03/slic3r-strange-defaults-causing-qu-bd-woes/

– Tormod Haugene – 2016-01-14T20:36:23.890Technically not an answer... he asked for the maximum one, you gave him how to calculate the "usual one" he already tested. – FarO – 2018-04-09T08:53:19.290