Why do the layers with black show a darker area across the whole area, and why do the yellow hands show a darker area as well?
Is this just a flushing issue? Or because the support is also printed in black? (Though that wouldn’t explain why the hands have the darker area, and why the head darker area is still visible after the support is removed.)
The only flush option selected is flush into objects support.
How do I get it to not have the darker areas?
There are two potential fixes here.
Review the actual flushing values.
This button found at the top left of the prepare tab above the filament pool.
Review the values between the lighter colours, particularly black to yellow as that appears to be the biggest area of concern.
You could experiment with higher values when printing.
Filament sequence (often overlooked)
This one is worthy of a good look, I strongly recommend you set this up no matter what you do with flushing.
Select the cog/hex shape on the bottom right of the tools to the right side of the build plate in the prepare tab.
Two of the entries (bottom as I write this) relate to the sequence of colours the slicer denotes will print.
I tend to reorder these so lightest goes first and works to the darkest. In your case the order should be; white, yellow & black. Insert any other colours based on that logic.
Do this for the first layer and subsequent layers.
This will mean you lightest colours are used first, rather than the darker colours inadvertently dragged through the lighter colours.
Testing.
Adjust if there is still issues, reset the height if all looks great.
I had actually thought flush volume before the print, black to yellow was at like 450, I arbitrarily increased to 650 and this was the result. Clearly I didnt guess high enough.
UGH! I knew I was forgetting something! I had actually recently watched a video about color sequencing…then again, it took me FAR too long to figure out where the (why the hell is the icon a nut?!) hex icon you were talking about was…its also been a super long day.
Running the test now! I appreciate the help! Hopefully all goes well!
Fingers crossed.
Test seems pretty good!
Going to YOLO it (god im old) and start the full print!
Can you take a shot with the other colours also visible?
Is this your model or someone else’s?
Can you provide the original model link from MakerWorld if it is AND your current 3mf here?
I am wondering if it might be translucency of the yellow and we’re just seeing the darkening from black being present in the layers.
My reasoning - look at the mouth and then the banding lines. There is a darker top and bottom band from the top and bottom lips but the sides of the lips don’t show up as dark.
If it was purge volume issues, those would be the same for all layers and the band where the lips sides are would be as dark as the top and bottom lips bands.
I’m thinking it’s just that there is black in the layer, not that there is any mixed in with the yellow.
A way to test would be to section out a wedge containing the lips as a different part but print them together so the printer still has to change out filaments. After printing, just remove the lips wedge and see if the bands go away in the head part.
Maybe?
Is there a way to fix this? More yellow wall layers?
I might just suck it up and leave it how it is, or take a yellow pen and color the whole head.
Obviously ideally I’d get it without the lines, but I’m running out of time (theres no deadline or anything, I’m just impatient…super great quality to have with a hobby like 3d printing!), and filament.
It’s that whole, I want it to look good, but I’m tired of waiting 9 hours per print.
I do think there is something to your theory though, at Malc’s suggestion I printed a small section starting below the mouth to a few layers into the white section and there was no visible black in the yellow. I assume because there was a bunch more light. However like a dummy I didn’t take photos of it.
My 3mf
BRICK_MAN (Chicago_Blackhawks) .3mf (6.1 MB)
Original
Original Head
First, I don’t know for certain that’s the issue but it seems to fit. But if it is correct, a less translucent yellow could maybe fix it. More walls could help too and would be an interesting test.
It’s hard to tell from the photos but it looks like the images on the model page are a little different yellow and it looks just slightly less translucent. But a lot could make that just bs.
Is it your model? If so, another fix would be to print the eyes, brows, and mouth separately if that hasn’t been suggested and rejected. Only thing is orientation may give you layer steps on the surface to match curvature but would really speed up the print. But on inserting the bits it would be interesting if the banding appears. (Edit - I see it’s probably not your model)
Yes, it is not my model.
Honestly, there is no real reason I am using this yellow, other than it was conveniently already on the AMS lite.
I was going to suggest disabling long retraction, but I don’t see how that could help, so I’m deleting that idea so you don’t waste your time.
The operating theory of long retraction is that it reduces the volume of previous material left in the head. It’s relatively recent thing but at this point I’d expect it works properly.
I actually just saw a message from Bambu in studio that they either disabled it or fixed it (I don’t remember now) because it wasn’t working for the A1/A1 mini…so maybe?
If you get to the point of grasping at straws, I think I’d also try disabling “flush into supports” just in case something weird is going on there. In fact if your yellow is very translucent that might be the entire problem.
I’d suggest upping the flush for the black even higher but there is something else you could do. If you have another dark color you use in place of the black, maybe a dark gray or navy. It might not need so much flushing.
I am doing some test prints.
I was looking up at the parts in the first photos and I think I might be wrong on the translucency.
Those hands are all yellow aren’t they? They show the same banding. If there is no black in them but they show the banding, it’s not translucency.
It’s bizarre. Hope you get it sorted.
