I have problem to print properly negative slope (45°) with PETG-CF (black one) of Bambu. The same piece is wonderfull with PLA (grey one).
I have less this problem if the the wall is thicker. I have tried with higher and lower temperature and speed: same thing. Otherwise with no negative slope, the print is perfect.
Here are the settings:
Thanks for your help and sorry for my bad english.
Your English is fine. Absolutely no need to apologize.
45° is, in my experience, borderline for PETG. Still good without supports, but close to the limit.
Did you dry the PETG-CF? It is not really optional but needs to be done at least after unboxing.
Those bags are not able to completely keep out moisture and after weeks at sea… And PETG is a bit of a moisture diva.
Thanks! No, I have never dried it, I am going to try, I have a special dryer for filament. 45° work properly if the wall is thicker. Unfortunatly, for this piece, I can’t increase it.
Some news. I have dried my filament→ no change. But I have change speed and ventilation:
And the result is perfect. It’s quite slow but it’ working.
If you change the volumetric flow rate, you can achieve a slow down by only changing 1 thing
This isn’t quite as good and doesn’t give you quite as much control, but it usually works,
Position of seam (z seam)
There are options to move it around, or you can rotate the print, or you can set it random
