Bambu p1s
Elegoo Pla Filament: Blue or black shows marks, lighter colours like white, red and yellow don’t visually show these marks but I can feel them if I rub over the area with my finger
Print Settings
Ironing type: topmost surface
Ironing pattern: Rectilinear
Ironing Speed: 15mm
Ironing flow: 15%
ironing line spacing: 0.1mm
Setting overrides
Zhop when retract: On 0.4mm
Z hop Type: Normal
Fuzzy skin
Fuzzy Skin: contour
Fuzzy skin point distance: 0.3
fuzzy Skin Thickness: 0.3
Problem
What are these Marks, extrusion, under extrusion, retraction? I’m not sure what the correct terminology is for this issue I would describe it visually as “Burr marks” any suggests on what to try to fix this problem? Rest of the ironed print surface is great.
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I have a similar issue with mine too. Hope you can find a solution!
Just came across this as I searched for another solution. Those marks look like over extrusion to me. They’re cause by too much filament coming out of the nozzle too slowly during ironing. When you see them all over a surface, the fix is easy, up your ironing speed or reduce your ironing flow (or both).
When it’s only on certain areas of a flat surface, the solution can be a little harder to pinpoint. I’ve noticed it sometimes when my print isn’t sticking perfectly to the build plate on the edges and has curled up, causing the distance between nozzle and surface to be smaller. My guess for your print is that the areas where you’re getting it have solid walls underneath, but the other areas where it looks good only have infill. When you bridge top layers over infill they can sag a little bit. That would cause the distance between surface and nozzle to be lower in those areas than the areas with walls.
Possible solution: I’d say increase your infill percentage and maybe change the pattern so that there are smaller gaps to bridge over. Maybe increase your top shell layer count as well. After that do an ironing calibration with your filament and use that to fine tune your ironing speed and flow until they’re perfect.
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Hey,
Thanks for the reply.
Would you suggest increasing the flow from 15% to say 20%?
The bottom doesn’t seem to be warping or curling up.
Top surface pattern is monotonic line
Bottom Surface pattern is monotonic line
Internal Solid infill pattern its rectiliner
Sparse infill pattern is grid
Ironing pattern is rectilinear
Which pattern from the above could I change and too which one?
Top shell layers is set to 5.
I’ve completed ironing calibration before and adjusted it to the best looking. although current settings seem to get the best result.
Here is some layer images from bambu lab. From layer 1 to layer 8
Yeah 15 mm/s for your ironing speed seems very slow. I do a lot of ironing and almost never go below 30. Granted I haven’t used your filament and there are other factors, but I bet that is what’s causing it. I’m curious what ironing calibration you’re using, because the one I use would definitely show significant over extrusion at 15 mm/s and 15% flow.
I’d probably try the default 30 mm/s and 10% flow first and see what my results look like. If you start to get small holes or places where you can see the diagonal pattern really clearly, that’s a sign that you’ve gone too far and need to up your extrusion.
I’ve printed with elegoo filament in the previous images (similar results with bambu) only the darker colours show marks, and lighter colours seem to hide it.
I printed this with the same settings as before last night but with E-sun PLA+ dark blue, and the lines and markings are more prominent. From what you’re suggesting regarding extrusion, I think it might match the photos below. although on the other two filaments these lines have not been visible noticeable.
Ironing settings as per below
Also with zhop settings as per below
With surfaces with engraved or embossed portions (like yours), sometimes surfaces can be underextruded in some areas and overextruded in others. The area that you’re concerned with is overextrusion. I promise. Like I said before, my recommendation is to change your ironing speed to 30 mm/s and ironing flow to 10%. That’s a good starting point and should be significantly better than your current settings.
After that, if you’re still getting a difference in extrusion between the completely solid area and the areas around the holes, consider turning off the part fan for the top layer only. That has helped me in the past. You can do that by slicing, and setting the color scheme to show layer time. Check the layer time for your top layer (it should be the highest value), then go to your filament settings and under cooling set the layer time for the min fan speed threshold to something lower than your top layer time. Set fan speed to 0 and uncheck keep fan always on.
Last thing, and this may or not be true, but I’ve noticed that the arachne wall generator has produced poor ironing results for me before. I’m not sure why that is which is why I’m hesitant to go spreading that info. But maybe try setting it to classic.
I’ve tried the below.
I haven’t tried the fan for the top layer yet.
Turning Arachne walls off resulted in the same.
What are the bits highlighted yellow called ?
Those look like underextrusion to me. That happens because the nozzle is moving too fast and not enough filament is flowing. 65 mm/s is pretty fast. It’s hard to tell from these pictures, but 30/10 looks decent. There is some underextrusion on that one around the middle circle. Turning off the fan for the top layer should fix that.
30mm
10%
12 top layers
Fan off on top layer.
Any suggestions on the below?
Best I can get so far not sure which setting would help with the below around the shape cut outs.
this one is
30mm
22%
0.15
12 top layers
Zhop off.
Fan On top layer
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