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Flow Confusion  

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Ken
 Ken
(@ken-7)
Eminent Member
Flow Confusion

I'm trying TPE filament for the first time.  From what I have read, flow should be set to about 115%.  I'm using the "FLEX' filament setting as my starting point.

In PrusaSlicer 2.7.0, I see:

Filament Settings > Filament -> Extrusion Multiplier = 1.15

This seems to match up with what I expected.

However, when printing, I looked at the i3 MK3 display window which is showing:

Tune -> Flow -> 95

Shouldn't this be showing 115?  Or am I misreading something?

Best Answer by Neophyl:

On the prusa profiles is a part of a printer start gcode block.  Printer Settings>Custom Gcode>Start Gcode.  You have to be in expert mode to see that section.

You will see a line something like M221 S{if layer_height<0.075}100{else}95{endif}

 

Posted : 02/12/2023 8:38 pm
Neophyl
(@neophyl)
Illustrious Member
RE: Flow Confusion

Those are different things, they both affect the amount of filament but are applied at different points. So extrusion multiplier is then multiplied by the flow. 
so EM =1 as flow 95 then its 95%
EM =120 x flow of 95 is 114%

Posted : 02/12/2023 9:27 pm
Ken liked
Ken
 Ken
(@ken-7)
Eminent Member
Topic starter answered:
RE: Flow Confusion

So where is the "Flow" specified?

Posted : 02/12/2023 10:31 pm
Neophyl
(@neophyl)
Illustrious Member
RE: Flow Confusion

On the prusa profiles is a part of a printer start gcode block.  Printer Settings>Custom Gcode>Start Gcode.  You have to be in expert mode to see that section.

You will see a line something like M221 S{if layer_height<0.075}100{else}95{endif}

 

Posted : 03/12/2023 12:06 am
Ken liked
Ken
 Ken
(@ken-7)
Eminent Member
Topic starter answered:
RE: Flow Confusion

Got it.  Thanks much for the info.

Posted : 03/12/2023 4:46 pm
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