Effect of Downstream Extrusion Multiplier and E_STEPS_PER_MM implications

Hi,

I just got my printer working about 30 mins ago!

To get the right (ish) amount of PLA to be extruded I played with the RepSanapper 'Downstream Extrusion Multiplier' bar on the Print tab. So far 2.5 seems about right.

What is that multiplier really doing?
Is it purely saying 'squit out 2.5 times as much stuff as the firmware and/or gcode settings tell you to'?
Or something more subtle that a newbie like me doesn't understand yet?

Does it imply I should double my E_STEPS_PER_MM value in my configuration.h file
(GEN6 electronics)

Cheers

Pete

That is exactly what it is doing. You can take this value, and use it to calculate more accurate setting back in SF.