Cause a lot saying that use Marlin firmware and it has that calibration stuff semi built in. So they mention it assuming that all firmware has that setting built in. Sailfish kind of does, but it isn't as "out there" as other firmwares.

What's wrong with calibrating on the fly with Extrusion multiplier? Even if you calculated a new number for filament adjustments to the Multiplier may still need to be made. So instead of adjusting in the .85-.9 range you would be adusting in the .98-1.03 range. The end result is the same.

Quote Originally Posted by wirlybird View Post
On some other boards it seems every time over/under extrusion comes up and anyone mentions the extrusion multiplier everyone jumps on the "you need to calibrate the extruder" band wagon. Why is this? I've been told we don't need to worry about it but why?

I can see that if you tell it to extrude 100mm but it only does 90 then it would be an issue so why wouldn't we want to calibrate the extruders?

Thanks for any insight.