Normal prints do not use calibrated Extrusion Multiplier width
 
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rhauff
(@rhauff)
Active Member
Normal prints do not use calibrated Extrusion Multiplier width

I have been fighting this problem for weeks, trying to get correct wall thickness and adhesion.

I am using an Ender 3 Pro and PrusaSlicer 2.3.0.  Used this guide to set my Extrusion multiplier:

https://help.prusa3d.com/en/article/extrusion-multiplier-calibration_2257

Got a perfect cube with wall thickness of 0.45" after setting multiplier to 1.09.

If I use the same cube and just uncheck "Spiral" and set Perimeters = 2, I get a wall thickness of 0.88".  Perfect.

Now if I try again to print the Ender 3 drawers, which have very tall  walls, with 4 perimeters, the stupid walls come out with thickness about 0.33" and each perimeter completely un-attached to adjacent perimeters.

I cannot attach files, so have added a Gdrive link to the .3mf files for Test cube and Ender 3 Drawer.

https://drive.google.com/file/d/1rHq4prLzEQicIkrT0IH55fyRd_biWOer/view?usp=sharing

https://drive.google.com/file/d/1HlK_Bcrz-nJ98wY_fWD1qUN-PFMvU4vX/view?usp=sharing

Publié : 05/02/2021 10:12 pm
bobstro
(@bobstro)
Illustrious Member
RE: Normal prints do not use calibrated Extrusion Multiplier width

First thing is try is slowing down. If you're moving to larger prints, speeds are faster and you can outrun the hotels capacity. Save your part and settings in a 3MF project file, zip it up, and attach it to a reply here so we can look at everything and give better suggestions. Attachments must be zipped. 

My notes and disclaimers on 3D printing

and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan

Publié : 06/02/2021 12:00 am
rhauff
(@rhauff)
Active Member
Topic starter answered:
RE: Normal prints do not use calibrated Extrusion Multiplier width

Ok, I guess my Gdrive links didn't work.  I've attached zips

cube-40-40-40_Spiral-Single-wall.

3mfV3_CASE.3mf

I have speed for perimeters at 40mm/s for perimeters in Prusa, then turn it down to 70% on the Ender 3 when I print PETG, since I can't find a way in Prusa to set print speed for individual filament.  So it should be 28mm/S.  Same print speed for both cube and case.

Publié : 06/02/2021 3:15 am
rhauff
(@rhauff)
Active Member
Topic starter answered:
RE: Normal prints do not use calibrated Extrusion Multiplier width

Here is my test cube printed as the calibration guide shows, in spiral mode, with Inland PETG, and 1.09 Extrusion Multiplier:

Now here is a real print project, the Ender 3 drawer case.  Prusa slices it with 4 perimeters, but now it prints with an extrusion width of about 0.33", and perimeters do not adhere at all to adjacent.

Publié : 07/02/2021 2:21 pm
rhauff
(@rhauff)
Active Member
Topic starter answered:
RE: Normal prints do not use calibrated Extrusion Multiplier width

Some corrections, as it appears I cannot edit my own post (lesson to use preview 🙂

Units above are mm, not inch.

The 1st photo above is not spiral sliced, but rather 2 perimeters.

Publié : 08/02/2021 5:11 am
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