Summary

Ever sliced a print just to discover that your flament had another diameter than you thought?

Many control panels let you set the flow rate as a percentage -- but what do you set it to?

This table gives the answer. Print out, hang up and don't panic.

Custom Section

Math

            <div><p>There are no guarantees for the result you will get from this table. Use at your own peril, verify the numbers with a trained matematician and a firmware engineer, and don't blame me if a wrong setting causes under-extrusion, or fills up your basement with half a tonne of excess plastic, creating a spill pattern that summons Cthulhu. You were warned.</p><p>The accuracy of this table is dependent upon the inner workings of the printer firmware being as I assume without having read through the source code yet. :-)</p><p>I have assumed that the flow rate setting is simply an adjustment of the extruder speed, and thus the percentage translates to a compensation for the difference between intended and actual filament cross-section area (since volume is area times the extruded length).</p><p>The cross-section area is calculated as pi<em>r</em>r, and the flow percentage is the intended (sliced) area divided by the actual (filament) area.</p></div>

Filament Flow Rate Table