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Should I Change the Extrusion Multiplier?  

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Henry
(@henry-2)
Active Member
Should I Change the Extrusion Multiplier?

First, I love my printer and I love the quality of prints I get from it. But, my extrusion appears to be off, and I don't know if I should fix it.

  1. Spool f31ef8e380 - Prusa put 1044g on it, Octoprint said that it had 1101.9g. This is a difference of 5.5%
  2. Spool e5e3e5b183 - Prusa put 1046g on it, Octoprint said that it had 1092.9g. This is a difference of 4.5%
  3. I just finished a multi-day print. PrusaSlicer stated that it would require 496.17g of filament, but it weighed in at only 446g. This is a difference of right at 5%

I think I can "fix" this by setting the extrusion multiplier 1.05%. I'm not sure that I want to do it though. I like that I still have some filament left when OctoPrint says it is empty, but I can handle this manually even if I dial in the extrusion multiplier perfectly. Is this something that you would fix were it your printer?

Posted : 17/07/2021 4:00 pm
Henry
(@henry-2)
Active Member
Topic starter answered:
Photos of extrusion

Posted : 17/07/2021 4:02 pm
AnnieR
(@annier)
Estimable Member
Huh?

One principle I remember from the first class I took on 3d printing was the instructor's admonition to "not f... with any of the slicer parameters" unless you really know what you are doing and have a very good reason to do so. 

Having said that (BFG), yeah, I've occasionally set the flow to like 1.05 and reprinted but it never really changed much. 

Posted : 17/07/2021 4:29 pm
AnnieR
(@annier)
Estimable Member
Title here

Hey!

WTF is this "add title here" pop up when the thread I'm replying to already has a title?

Posted : 17/07/2021 4:37 pm
xenon
(@xenon)
Eminent Member
RE: reply

those small differences do not matter at all. put your full and later the empty spool on a scale if you want something accurate.

extrusion multiplier needs to be adjusted so that your top surfaces look nice and/or your single wall thickness is correct.

if your prints already turn out nice and you have no issues...why even bother with this estimated value.

Posted : 17/07/2021 5:31 pm
Henry
(@henry-2)
Active Member
Topic starter answered:
Vulgarity!!!

Thanks to the two of you. I think I'll leave it alone and just add about 3% to my spool weight when I add it to the spool manager.

Posted : 17/07/2021 5:36 pm
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