These are some abs brackets I have been working on and every time I print them I get this weird issue on my fillet corners. It doesn’t help every single edge is basically a fillet corner.
Using stock bambu settings with infill set to 90%.
Textured print bed with bambu glue
Preheating the bed / chamber before print with turning the fans basically off.
I have tried different arrangements / print orientations.
The filament was dried for 12 hours before printing in my sunlu dryer and it was new.
Printing one model at a time. I have 3 different versions I have been trying to print together and they all get this notching/ribbing in the corners.
I really dont think this is an adhesion issue. I don’t get any warping that I can see / no lifting at all. the filament is great other than this one issue.
The model I put together in fusion 360 and exported it as stl binary and 3mf versions. I tried both formats just to make sure it wasn’t a data issue.
Is there a common name for this type of defect? and any ideas what I could do to fix it.
Just to note. I don’t get this defect printing in pla.
Thanks for the welcome and for taking the time to respond. I saw your responses to another post on abs and they were very helpful.
Just you posting k pressure value was enough to get me pointed in the right direction I hope. I just did my first 2 calibrations and got a factor of 0.015 for both. bambu has default at 0.040.
I am reprinting my model now so we will see how it goes.
After doing the calibration, its a night and day difference. I did a single run of one of my brackets and it came out almost perfect. Some weirdness happened in two of the channels. I took a picture but unless that random line is part of the calibration I do believe the issue is fixed. I am doing another set with more infill to see how it goes.
The line you are seeing is a seam. If you check out the “Prepare” tab after you slice the model you will be able to see where these are as shown by the white line/dots.
You can adjust where the seams are in the model in the settings. There is also the option to use the Seam painting tool to locate them exactly in the best place to hide them. A final option is to use “Scarf seam” which layers the seams and does a decent job of hiding them once you dial it in.
Do you have any recommendations on settings for ironing. I have done a bunch of different prints and gotten some ok results but still struggling with what I would consider a defect.
My current settings
irorning
• top or topmost surface depending on the model
• ironing pattern – Rectilinear
• ironing speed – 30 mm/s
• ironing flow – 8%
• ironing line spacing – 0.22mm
• ironing inset – 0.1mm
The angle edge comes out very rough like the print head leaves a lump there.
I haven’t done much ironing. When I’ve needed it, I’ve used the stock settings with descent results. I will say that dialing in ironing does also depend on a well calibrated filament so that is where I would start.
I’m sure others on the forum have more insight into ironing.
I have been working on ironing with abs for a few days now with not much luck. I would say the biggest issue is actually getting any meaningful results from the test prints. I started with the small tester recommended by @ziknazzo. The problem with this tester is its small and most of the results end up looking good on the tester but once you get on a larger print, its nothing like the tester.
So I bumped up to the larget test print found on makerworld.
The issue is more the same. Its hard to tell whats good and whats not. Also, its funny how a square can look good go to bad and look good again. I would have thought that you would have bad in the top left going to great in the middle and bad at the bottom right again. With a clear good diagnal column of results. Instead i have a ton of middle good and have not reached the bad on the right yet.
I have been putting some under the microscop to see really which ones are my subjective best. Even with all this there is no sure fire, this one will look good on the actual model I’m printing.
