Hi people! I am triyng to print one cup that needed internal support but this internal support dont have adhesion in top of PETG and I always lose 12 hours of print.
Anybody has a trick to do this fix?
Thank´s
Hello @rpotalara …! 
Welcome to the Creality Forum…! 
A couple things…
Could we see a pic of the whole cup.
What temps are you using for the PETG…?
Maybe try some different style supports…?
Hi @jimandyen , I am using 255ºC with PETG with good adhesion on bed, but this inside support is my problem. I dont have adhesion with PETG to PETG. I tried to Pause in Layer 42 and put glue without success. With this last version of Creality Print 5.1 the Pause won´t work for me.
Other support use a lot of material and made imperfection on surface.
Is it just me or is the internal support starting to print after 2 layers? In the air?
Thank´s
That’s a good idea to pause and put the glue on.
Honestly I’m not sure why it’s not sticking. Sorry.
Some members here will most likely know more about that. I’ve not used PETG much with supports…
I also know what you mean on the pause function. I had to jump back to version 10249 because of that.
Make sure after you add the pause to reslice again… 
Can that design be altered so there is no inner brim or overhang at the top…?
I have printed a fair amount of PETG, and I have had tree supports that sat on top of PETG that worked fine. I would be curious to see that if you printed with a brim, the outside supports would fail. I will say that if this print succeeds, you are going to have a heck of a time removing the supports inside the cup. My only suggestion would be trying to use normal support.
I am curious, do the 2 trees inside the cup kind of “shred” each other? I have had some very strange artifacts when printing single walled objects near one another. Tree supports are single walled, and I have seen these effects on tree supports.
Good luck,
The Kapt
Hi @kaptdeath , Yes, I think impression that base of internal support was printed one layer after needed. So, maybe It is in the air! See video in above topic. Yes, you are correct, the 2 trees inside the cup kind of “shred”.
I printed this exact cup in PLA and I didn´t have any problem to remove internals support.
Normal support:
Tree Auto (Normal):
Tree Auto (Slim):
I tried to recreate the tree shredding by repeating a print that I had seen it in previously. I changed filament brands and colors as well. The problem did not occur! It is hard to believe that this is a material problem, but there are a few things that indicate it might be. I generally use Overture PETG, and have had very good luck with it in the past. I am printing multiple objects, and am getting virtually no stringing (which is very odd for PETG). However, I am having all kinds of problems with shredding single walled objects (I am printing Christmas light covers.) The other PETG is IEMAI, I have also used it a fair amount with good results. It strings like crazy (like PETG usually does) but does not exhibit any of the shredding. I am not saying that Overture is bad filament, but for some reason it seems to have trouble feeding on time. (I have printed quite a few normal objects with Overture PETG with great results, so I think it is something that happens with multiple single walled objects.) I wish I had a better answer for you, but this is what I am seeing. I hope it helps.
The Kapt