I’ve had my P1S for a couple weeks now, so I’m still pretty green at this. Can someone help me with why there would would be this “fraying” at the seam on the inside of this piece? I’ve gone through the manual flow calibration. I can see a seam on the outside, and that doesn’t bother me. It doesn’t have the stringing issue that the interior seam does.
What you’re seeing is stringing. What filament type are you using and did you try to manually calibrate it?
But before you go down that path. Try loading Orca Slicer on your machine. It is a clone of Bambu Studio and you can run it in addition to Bambu Studio. However, Orca has many more features than Bambu including calibration features.
This could be caused by a number of reasons. Here’s a short list of things to investigate but as a newbie, I will suggest a potential quick fix at the bottom of this post.
- Mis-calibrated filament.
- Too much moisture in the filament especially if you’re using something like PETG.
- Seam gap too large. This can be edited in the slicer but requires patience and some amount of trial and error. In my view, this would be my first area of diagnosis after filament tuning.
Possible quick fix. Scarf Joints.
Scarf joints are something borrowed from carpentry which was recently included in Orca Slicer. Here’s a wood scarf joint from Wikipedia. It would help to understand by reading the short article.
In Orca, you gain access to scarf joints in the Quality menu. I don’t believe this is available in Bambu Studio yet. You will want to select both contour and hole since the stringing you’re seeing is on the interior.
NOTE: Scarf joints are a beta feature but I’ve been using them for a few months and they pretty much eliminate seems.
For a better explanation of how scarf joints work, view this video.
If you’re unsuccessful or just unwilling to tune your filament, there is a cheat that you can use which helps in circumstances where the nozzle is moving across the model in open space. Within the slicer you can check under the quality menu, “Avoid Crossing Walls”. All this will do is restrict the nozzle movement to minimized cross wall movement so that stringing is reduced, NOT eliminated mind you.
1 Like
I’m using the basic PLA Bambu filament. I’ve run the calibration on it, and I’m sure the line flow test is good. I ran that one a couple times, and the same line looked good to me both times. I also ran the second calibration test with the smoothness squares.
I tried using the developer feature in Bambu slicer to reduce the seam gap to 5%, but it didn’t seam to improve much if any. I was looking at the scarf joints, but I kept getting an error message when I sliced it that the build plate wasn’t high enough. It gave the model tens of thousands of layers. Maybe it will work better in Orca slicer.
If I read you correctly, you’re using the Bambu calibration tool. If that is the case, you might as well be entering random numbers because that tool is all but useless unless you have a trained eye.
On the topic of seam gaps. Are you running test samples or just experimenting with your model? If you’re experimenting with your model, you’ll be wasting a lot of time and filament.
I’ll never recommend fiddling with two settings simultaneously. This violates the first rule of troubleshooting which is to change only one variable at a time. Either chose to first fix your filament tuning or your seam gap but not both at the same time.
If you want to experiment with seam gap, here’s an alternative approach that will allow you to perform multiple seam gap tests on your model simultaneously using different settings. Note in this example, all you’re doing is varying the seam gap.
- Take your model and use the cut tool to remove a 5-10mm section of the model. This will become your test case.
- Ensure that you are getting stringing in the test model.
- clone the model 3 more times or as many tests as you want to run. CTRL-K is the shortcut key for clone.
Now that you have 5 samples, then and only then go into the objects menu and change the seam gap for each one using increments of your choosing. Then slice and print.
Select the model and use the cut tool. C is the shortcut key. Set the height to the test model.
CTRL-K to clone
Select the objects menu and change the seam gap for each model. This will allow you to run multiple tests using different values.
2 Likes