How to improve a bad vertical print quality with ABS?
Currently i'm printing PLA and PETG without problem, problem comes with ABS which i'm now printing most of the time now. It print OK but when it come to vertical tall walls it start to print bad, but if i print a large model but less taller it print almost perfect.
I'm printing at 120º/115ºc bed and 250ºc FilaFarm ABS, using a plastic bag to hold the temperature, ambient temperature when start is about 20ºc, and when finish is about 55ºc in the case i'm posting now: (See attachment)
Here's a bad result of a vertical print, as you can see base model is perfect, but when it start to build the vertical wall it start to do this bad looking artifacts.
I also tried with other filament, i print a 60x60x100mm box with 1.6mm walls, but when it reach about 60mm it start to create lines or misaligments, still 0 crashes.
I also have successfull proofs with ABS: https://www.thingiverse.com/thing:2847365 that box was designed by me and printed well, but some lines can be noticed on middle of the vertical walls
This box was made with Prusa ABS brown and print well, but is not so tall to create problems.
Here's a bad result of a vertical print, as you can see base model is perfect, but when it start to build the vertical wall it start to do this bad looking artifacts.
How to improve this situation with ABS?
Re: How to improve a bad vertical print quality with ABS?
I also forget to mention the strange fact that a 200mm owm with only 2 perimeters no bottom layer, no infill, no supports prints fawless, no clue why some print well and others don't: [Prusa Perl w/glitter ABS]
Re: How to improve a bad vertical print quality with ABS?
Add some cooling for smaller layers. Even though you usually don't need cooling with ABS, when you have small layers you do need a little so the ABS has time to harden before the next layer goes down.
Here are the cooling settings I use with ABS; I've found this really helps a lot:
Enable Auto Cooling: On
Fan Speed: Min: 10%, Max: 25%
Bridges Fan Speed: 30%
Disable Fan for the first: 3 Layers
Enable Fan if layer print time is below: 60 seconds
Slow down if layer print time is below: 20 seconds
Min print speed: 5mm/s
Re: How to improve a bad vertical print quality with ABS?
Add some cooling for smaller layers. Even though you usually don't need cooling with ABS, when you have small layers you do need a little so the ABS has time to harden before the next layer goes down.
Here are the cooling settings I use with ABS; I've found this really helps a lot:
Enable Auto Cooling: On
Fan Speed: Min: 10%, Max: 25%
Bridges Fan Speed: 30%
Disable Fan for the first: 3 Layers
Enable Fan if layer print time is below: 60 seconds
Slow down if layer print time is below: 20 seconds
Min print speed: 5mm/s
Thank you, i will try that advice and reprint something as a test.
Do you use with all ABS prints or only with specific cases?
Re: How to improve a bad vertical print quality with ABS?
Thank you, i will try that advice and reprint something as a test.
Do you use with all ABS prints or only with specific cases?
At first I tried this just for prints which were giving me problems. But it seems to work well for ABS generally.
Re: How to improve a bad vertical print quality with ABS?
Thank you, i will try that advice and reprint something as a test.
Do you use with all ABS prints or only with specific cases?
At first I tried this just for prints which were giving me problems. But it seems to work well for ABS generally.
I just test that on a small model that failed big previous and this did the trick! it come out perfect with same settings+this.
I will try out on other examples too
Thank you ❗
Re: How to improve a bad vertical print quality with ABS?
Hello Guys,
I had similar issue printing an ABS gear:
as soon as the printer started doing several repetitive perimeters ( the gear theet),
the print warped vetically, with consequent nozzle crash.
I enclosed the printer in a improvised cardoard box ( reaching around 40°c)
and added your tweaks in the slicing with Slic3r.
I am very happy with the results, comparing the orange ABS gear with the black PETG
Thankyou for your precious hints.
Paolo
Re: How to improve a bad vertical print quality with ABS?
Thank you for the cooling settings. I was having difficulty with the bottom layers using ABS while the top layers were perfect. Adding these settings resulted in a perfect print. Bottom layers looked like someone took a lighter to them in some of the corners and along the sides while the top of the part looked great.
I also added four layers of raft, and 5 perimeter shells to the 0.15mm optimum settings. I added the raft as the first few layers were always wider than the model. They are still visibly wider but much better.