Minor problems with ABS
I'm having three issues with my larger prints. I'm hoping for some suggestions to resolve them.
1. I'm printing on glass, with a water/gluestick spray mixture, I'm getting good adhesion, however once the part has cooled and released on its own, the center rises. This seems to be the exact opposite of what most encounter 🤔.
2. I have chamfers on all edges of the side that is on the bed. These chamfers do not come out clean.
3. I have what I think is a small amount of layer shift?
I'm using SuperSlicer. Pretty much default 400mm and ABS settings. I believe the only changes have been 255C nozzle temp and 110C bed temp and some cooling, something like 45% fan if the layer time is below 25 seconds, and some shrinkage compensation. I do have a cooling fan for the stepper drivers, so I'm running the other Klipper settings for higher torque and acceleration IIRC. I have input shaping and pressure advance enabled. I'm printing with Atomic's White ABS. Let me know if there are any additional details I can add.
15 Replies
On second look, this isn't layer shift. The top 2mm sticks out on the front, back, and a portion of one side.
This is at the same height as another feature. I assume the issue is somehow related.
What does the STL look like?
Here's is the file, does that help?
Here's a screenshot of it sliced.
The file doesn't help cause I'm on mobile and unable to get to my computer. But if the STL is flat like that, then yeah you either have some major over extrusion or later shifting or both
It's hard to describe. It's flat, but the top section has a relief for another printed part to set into it and then be fastened together.
I could see it being over extrusion, I've noticed some zits too that a friend mentioned might be over extrusion. But I'm pretty inexperienced in trouble shooting 3d printers. Could you help me to understand, is the "Generic ABS" Filament Settings in SuperSlicer supposed to work out of the box for all EVA 3 options? ...or is it more of a rough starting point? I'm not sure if it's also worth mentioning I'm running the LGX Lite and Mosquito Magnum (but I guess that can be seen in the first picture).
Additional unnecessary context, it's this project: https://www.printables.com/model/259323-yet-another-smart-vent-6x10 I haven't uploaded this vent top, but now that I have a large enough printer, I'm printing parts I previously split, as one piece.
Printables.com
Yet Another Smart Vent 6x10 by Brobston Creations | Download free S...
WiFi Smart Vent | Download free 3D printable STL models
The pre-made settings are very conservative and you will need to tune to your machine. Best advice I can give is try a smaller print and see if you have the same issues and then fix them before doing a big print in abs
It seems that the issues aren't present or a lot less obvious with smaller prints. I made a 1.5inx1.5inx2mm with a 1.5mm chamfer (same as the previous model) and had no issues. I definitely agree with the theory though. Maybe there's a better model to test with?
Would any of the SuperSlicer Calibration guides help troubleshooting overextrusion?
I did a comparison between some of my modified settings and the original. I'm not sure if I accidentally changed these or if the default settings changed. I know that I changed a few of these, but less than half of them. Nonetheless, I took the original settings except for the few filament settings I had (nozzle and bed temp and layer cooling). I'm going to give that a shot.
This definitely fixed my second issue. Chamfers against the bed look just about perfect.