Extrusion width for certain parts at 50% - PrusaSlicer https://forum.prusa3d.com/forum/prusaslicer/extrusion-width-for-certain-parts-at-50/ Prusa3D Forum Discussion Board en-US Wed, 11 Mar 2026 16:01:20 +0000 wpForo 60 RE: Extrusion width for certain parts at 50% https://forum.prusa3d.com/forum/prusaslicer/extrusion-width-for-certain-parts-at-50/#post-749717 Tue, 13 May 2025 04:54:21 +0000 Yes, exactly that, over layer height, that’s what the tooltip means , the percentage is based on the layer height and not nozzle width.  

]]> PrusaSlicer Neophyl https://forum.prusa3d.com/forum/prusaslicer/extrusion-width-for-certain-parts-at-50/#post-749717 RE: Extrusion width for certain parts at 50% https://forum.prusa3d.com/forum/prusaslicer/extrusion-width-for-certain-parts-at-50/#post-749714 Tue, 13 May 2025 01:22:40 +0000 Yup that did it. The tooltips doesn't tell you that. It says "over first layer height."

]]> PrusaSlicer travisstdenis https://forum.prusa3d.com/forum/prusaslicer/extrusion-width-for-certain-parts-at-50/#post-749714 RE: https://forum.prusa3d.com/forum/prusaslicer/extrusion-width-for-certain-parts-at-50/#post-749372 Fri, 09 May 2025 21:14:15 +0000 As I suspected and have now confirmed.  You really should read the tooltips :)  Hover over the first layer extrusion width field and have a read.  Your first layer is set to 115%.  When extrusion widths are defined in percentages they are not computed against the nozzle diameter but against LAYER HEIGHT.  So first layer height is 0.2, your extrusion width is 0.23 This one gets loads of people.

]]> PrusaSlicer Neophyl https://forum.prusa3d.com/forum/prusaslicer/extrusion-width-for-certain-parts-at-50/#post-749372 RE: Extrusion width for certain parts at 50% https://forum.prusa3d.com/forum/prusaslicer/extrusion-width-for-certain-parts-at-50/#post-749371 Fri, 09 May 2025 21:06:15 +0000 Sorry about that, it thought i had uploaded it.

shellington

]]> PrusaSlicer travisstdenis https://forum.prusa3d.com/forum/prusaslicer/extrusion-width-for-certain-parts-at-50/#post-749371 RE: Extrusion width for certain parts at 50% https://forum.prusa3d.com/forum/prusaslicer/extrusion-width-for-certain-parts-at-50/#post-749370 Fri, 09 May 2025 20:43:40 +0000 Not from a snippet of gcode no.  We would need a copy of your prusa slicer project file to examine.  Use file>save project as and then take the resulting .3mf file and ZIP it up.  If its not zipped the forum will silently drop the attachment.

I'm guessing you didn't zip it on your original post.

]]> PrusaSlicer Neophyl https://forum.prusa3d.com/forum/prusaslicer/extrusion-width-for-certain-parts-at-50/#post-749370 Extrusion width for certain parts at 50% https://forum.prusa3d.com/forum/prusaslicer/extrusion-width-for-certain-parts-at-50/#post-749206 Thu, 08 May 2025 23:39:50 +0000 When the first layer of my print was coming out in a thin string and obviously not adhering to the plate, I checked the gcode and noticed that for certain parts, the extrusion width changes to .23mm or 50% of the regular extrusion width. I could not find in the print settings what could cause this and I'm hoping someone can help me find where to adjust this.

Here's a snippet of the gcode to show where it changes and the .3mf to see all the settings.

;TYPE:Support material interface
;WIDTH:0.45
G1 F1200G1 X-4.749 Y-3.966 E1.54241
G1 X-5.01 Y-4.284 E1.55634
G1 X-5.04 Y-4.655 E1.56894
G1 E.06894G92 E0
G1 X-6.162 Y-6.698 F7800
G1 E1.5 F1200
G1 X-6.008 Y-6.942 E1.50977
G1 X-4.147 Y-4.976 E1.6014
G1 X-4.056 Y-4.707 E1.61101
G1 X-4.123 Y-4.198 E1.62839
G1 X-8.097 Y-8.172 E1.81862
G1 X-7.871 Y-8.372 E1.82884
G1 X-7.52 Y-8.35 E1.84074
G1 X-6.393 Y-7.327 E1.89226
G1 X-6.557 Y-7.093 E1.90193
G1 X-7.205 Y-6.82 F7800
G1 F1200G1 X-7.655 Y-7.06 E1.91919
G1 X-7.958 Y-7.395 E1.93448
G1 X-8.332 Y-7.549 E1.94817
G1 X-8.738 Y-7.955 E1.9676
G1 X-8.775 Y-7.678 E1.97706
G1 X-8.523 Y-7.585 E1.98615
G1 E.48615
G92 E0G1 X-8.131 Y-8.563 F7800
G1 E1.5 F1200
;TYPE:Support material
;WIDTH:0.23
G1 X-8.425 Y-8.386 E1.50534
G1 X-8.876 Y-8.4 E1.51236
G1 X-8.57 Y-8.677 E1.51878
G1 X-8.344 Y-8.701 E1.52232
G1 X-8.155 Y-8.578 E1.52583
G1 E.02583
G92 E0G1 X-6.738 Y-8.709 F7800
G1 E1.5 F1200
G1 X-6.221 Y-8.366 E1.50965
G1 X-6.061 Y-8.097 E1.51452
G1 X-5.987 Y-7.788 E1.51946
G1 X-6.049 Y-7.472 E1.52447
G1 X-7.225 Y-8.515 E1.54892
G1 X-6.765 Y-8.713 E1.55671
G1 X-6.236 Y-7.752 F7800G1 F1200
G1 X-6.236 Y-8.063 E1.56155
G1 X-6.444 Y-8.341 E1.56695
G1 X-6.444 Y-8.05 E1.57148
G1 X-6.652 Y-8.233 E1.57579
G1 X-6.652 Y-8.483 E1.57968
G1 X-6.86 Y-8.508 E1.58294
G1 X-6.86 Y-8.305 E1.5861
G1 E.0861
G92 E0G1 X-5.164 Y-7.341 F7800
G1 E1.5 F1200

 

]]> PrusaSlicer travisstdenis https://forum.prusa3d.com/forum/prusaslicer/extrusion-width-for-certain-parts-at-50/#post-749206