Hello
I’m printing some Gridfinity boxes using the Bambu Matte White that comes with the P1P.
Im getting a strange horizontal line/bulge where the top layer of the base transitions to the walls.
Ive printed dozens of these on my Makerbot Rep2/cura which print fine.
Anyone know how to fix this? I’m guessing its a slicer setting?
10 year old Makerbot print as a comparison
See The Benchy hull line | Prusa Knowledge Base for an explanation and possible solutions.
I’m not sure if this will help you, but I was having similar problems on my Gridfinity stuff but at the top for the transition from the infill area to the part with no infill on the rim.
I was pretty sure that the inner walls/infill change was causing the outer wall to bulge out in certain spots if it got printed last. So I changed the order to do the outer wall first, which seemed to improve things considerably.
Love me some Gridfinity.
This print looks awesome, what material did you use?
Thanks. PLA-CF for the bottom, and regular PLA for the color accent rim.
I was having trouble with the walls on bins that were a single filament, as the rim looked completely different from the base even though they were the same material. So then I started playing with different colors for the rim before I figured out the inner/outer wall order fixed the look on the outer walls of single filament bins.
Is there any update on this? I am experiencing the same issue and @Matt 's suggestion did not work for me.
Me too 
tried suggestions in those mega threads too. I didn’t have this issue on my Ender 3
Even if the problem is the same, the cause and, thus, the fix can be different.
I would try @Matt fix, i.e., the outer wall before the inner wall.
It is easier and faster to test, and many users have recommended and successfully applied this setting for gridfinity prints (before BL printers).
If that doesn’t work, I recommend you share more details and some images. Otherwise, it will be guessing. You may read the @holmes4 shared link to know the possible causes and fixes that may or may not be applied to your case.
The problem is that the model wall is too thin in this specific 3D model, in fact the wall is 1.20mm thick.
For example, if you use the default settings you will have two external walls of 0.42 and two internal walls of 0.45 = total 1.74mm.
As you can see we are far from the necessary 1.20mm. If the wall of the model had been 2mm, it would have compensated for that value of 1.74mm with some central filling material of approximately 0.42 infill, thus obtaining a part of approximately 2.16mm thick.
The printer will try to compensate for this gap causing these artifacts which have been known for many years in the world of 3D printing.
It is important to remember that the 0.4 nozzle has extrusion width limits and probably if you were able to print with your Ender 3 it is because your slicer had by default a function similar to “Detect Thin Wall” in Bambu Studio which should help you to print thinner walls. You also need to make sure that the flow is calibrated.
After one weekend trying to solve the issue, I summarize below what I’ve done. Hope this would help someone with the same annoying problem.
My model is a box: 20mm x 20mm x 6mm, with a thin wall of 1.5mm.
In the picture below there’s the Bambu plate, with numbers of each box, printed with different parameters:
1 - Default parameters (factrory default parameters for Bambulab X1C with PLA White Matte)
2 - Infill/Wall overlap: -5% (yes, with the minus)
3 - Seam position: back
4 - Order of walls: Outer/Inner
5 - Order of walls: Outer/Inner + Speed outer wall: 100mm/s
6 - Detect thin wall: true
7 - Wall generator: Arachne
Here below the results:
As you can see in the pictures, the best results are number 4 and number 5 (Order of walls: Outer/Inner + Speed outer wall: 100mm/s). The remaining aspects to solve on these were:
Here the results:
With the number 9 I consider the problem solved (trust me, in the pictures the defects are really exaggerated; with naked eyes, on the number 9 you cannot see any particular defect…and I’m really a fussy person on these things!).
So, to conclude, this is the configuration I will use in the future:
Hope this could help!
maybe not, with the same situtation. I think the offical need to make all details been prepared before the printing
Hey there, Do you have any other tips? I copied your experiment, tried a lot of combinations, but I can’t see an improvement
