cakeforcat

So now that we came to this, any idea how to fix this if reducing speed won't work(it's already at 25mm/sec)?

Thanks now I understand it. So now I know it's a problem with extrusion but only in the skin lines so it might be something with speed, I'll try to lower it and see what happens. (I've also realized the walls of the cube i measured were printed really slowly so that may be the cause they are fine.)

Just to be clear with my approach(not that I'm saying yours is wrong, just want make it clear so someone can correct me). Here is a part of the gcode: ;TYPE:SKIN G1 F1350 X119.65 Y100.35 E99.2533 G1 X119.65 Y119.65 E99.8888 G1 X100.35 Y119.65 E100.5243 G1 X100.35 Y100.35 E101.1598 G0 F7500 X100.525 Y101.084 G1 F1350 X101.084 Y100.525 E101.18584 G0 F7500 X101.706 Y100.525 G1 F1350 X100.525 Y101.706 E101.24083 G0 F7500 X100.525 Y102.328 G1 F1350 X102.328 Y100.525 E101.32479 G0 F7500 X102.951 Y100.525 G1 F1350 X100.525 Y102.951 E101.43776 G0 F7500 X100.525 Y103.573 G1 F1350 X103.573 Y100.525 E101.5797 G0 F7500 X104.195 Y100.525 G1 F1350 X100.525 Y104.195 E101.7506 G0 F7500 X100.525 Y104.817 G1 F1350 X104.817 Y100.525 E101.95046 G0 F7500 X105.44 Y100.525 G1 F1350 X100.525 Y105.44 E102.17933 G0 F7500 X100.525 Y106.062 G1 F1350 X106.062 Y100.525 E102.43717 G0 F7500 X106.684 Y100.525 G1 F1350 X100.525 Y106.684 E102.72398 G0 F7500 X100.525 Y107.306 G1 F1350 X107.306 Y100.525 E103.03974 You can take one of the lines and a move between the lines G1 F1350 X104.817 Y100.525 E101.95046 G0 F7500 X105.44 Y100.525 and by looking at the difference in the X direction it comes to a move of 0.623mm which is larger than the line width of 0.44 you can see in my screenshot(and even more than the 0.4 you say is in the profile I sent). Is it intentional or am I reading it incorrectly?

Hmmmm, that's weird. Here's my profile i definitely sent you in cura, and the one with which i printed.

Yeah, apart from 0.401mm not being 0.44 I have set(But I' guess you mean it's not a big difference which I agree), You can clearly see the literal gap between these lines(or maybe they are just this thin because of this gcode viewer, correct me if I'm wrong). I'm not saying cura is miscalculating extrusion, It's ok as I've calibrated it (Hence the 90% flow rate). What I'm saying is those gaps between those lines exist at all. Now I don't know if the gaps between them are because of spacing in the gcode(the slicing is wrong, so either a wrong setting or a bug) or just under-extrusion(which only affects those skin lines as the rest of the print is fine, which is really weird and means my settings are wrong, but then If i know the lines are 0.44(I've measured) and you calculated them to be around 0.4 then why is cura with a set line width of 0.44 slicing with such big gaps?).

I have a different cube printed that shows that's the case too. Right now I'm mostly thinking it actually is a bug in Cura, because going back to 100% flow indeed closes the gaps but at the expense of line width accuracy(I'm measuring 0.49 at 100% flow and it shows over-extrusion on outer shell lines.). The thing is, That just changing the flow affects the whole print wherein here the only affected area is the inner lines, they shouldn't be this far apart when I have a line width set to 0.44 and flow rate calibrated to make 0.44 lines.

@burtoogle I'm 90% sure I didn't change anything in the settings since then but to be safe I also attached the .gcode I printed with and the .stl model of the cube(this I don't know why, I think I'm just throwing as much information as I can for no reason 😛 ) CE3_cube.3mf cube.stl CE3_cube.gcode

My nozzle diameter is indeed 0.4mm but by a suggestion(made by CHEP on YouTube if I remember correctly) of making the line width a bit larger than that I have set 0.44 in every setting in Cura and calibrated my flow rate to match that (Using a 1 line thick spirally printed cube and measuring the wall thickness). After that the line width is 0.44 as I've measured and this is working just fine when printing the outer lines on the bottom layers and the spiraling wall and it's not a problem of just the first layer as I've mentioned, but is happening on all 5 bottom layers I specified. I'll try to slow my speed a little but It's weird that it's only happening on the diagonal inner lines and not on the outer lines.

Hi, I've recently calibrated my flow rate on my Ender 3 so it's extruding at a 0.44mm line width accurately but realized that the spacing between the skin lines (bottom layers at least) are spaced away from each other creating a mesh rather than a surface. You can see it on the image, the tiny holes are big enough to let water pass through. I've checked the generated gcode and if I understood it correctly(a move in X between the end and start of a new line) the distance between each line is something around 0.62mm, which would explain the the size of the gaps. Is there a setting to get rid of this effect or is it a bug in Cura? Note that there is no gap between outer shell lines. Also I've seen as it was printing that the gaps were in every bottom layer so it's not a bed adhesion problem.