This is the very first time I am trying to have PETG prints but I have adhesion problem in the first layer. I am using bed temp as 75 Celcius, and nozzle is 240. I am using a local brand from Turkey (Microzey). It is recommended by the seller, who also sells other expensive ones. So I am not sure what is wrong. I have added the photo of the bed. can any body give any advice about this. Even if I have adhesion at first layer, part is removed from surface 2 times in the middle of print first one was at 55%, second one is at 69%. I am not sure what is wrong. by the way front door is also open and plate is cleaned recently.
I cannot be precise about what’s wrong, but I will give you some tips to check up on. Note that PETG adhesion differs from PLA, which is stronger or weaker depending on the user experience.
- Bed cleanliness. If not done before, use mild water with regular dish soap and absorbent paper to hold it afterwards.
- Filament dry - did you dry the filament? If not, this may be a likeable cause.
- calibration - if you didn’t, try calibrating the flow rate and PA.
- printing settings - unless your PETG has exotic properties, it should print fine with the default Generic PETG preset. (PS: this doesn’t mean that your settings are wrong or these are the best; only that they must work and will eliminate some doubts)
2 Likes
I used these posts to get my PETG prints to a good standard. I was using Overture PETG. It went from looking exactly like yours to a good print with minor stringing. Note that in the first post it says to perform a few calibrations first.
All credit to @3DTech.
@Z3R0TRUST @JayZay thanks for recommendations. I used settings from @3DTech and you can see results in photos. adhesion in first layer is so so, but later on they are removing from plate, also you can see waves from big part. do you have any other recommendations to solve these issues. since I have 3 kg from this filament (unfortunately, I didn’t think this might happen) I need to solve this. thanks in advence for all your supports.
This is the Textured PEI plate? Have you tried using a glue stick? I use a glue stick when printing with PETG. You can also use mouse ears for those corners.
2 Likes
Apart from the recommendations above here a tip from my side:
PETG prints with sharp periphery corners on the build plate are prone to become detached so either use a brim on the periphery of the parts or at least use mouse ears on the sharp corners to get those parts to stick better.
1 Like
I attest that until I used a glue stick on the textured PEI plate, I was unable to print in PETG at all! With a bit of glue, the first layer adhesion is excellent.
I have never had to use a glue stick for PETG on textured PEI.
I also have never had warping issues with PETG on PEI.
The trick to PETG adhesion on PEI is to wipe with 70% or higher Isopropyl alcohol (IPA) in-between print jobs.
I’ve actually ran tests on this:
If you are cleaning with IPA and are still having issues, make sure the part cooling fan is turned off.
Most PETG will not bond correctly if it cools too fast. There are rare instances with the part being too small that the fan has to cool the layers, but 90% of the time there should be no part fan cooling.
Hi,
At first look, you still face issues on the first layer. I quickly looked at the 3DTEch settings, but it entails many changes. Yet, it seems better; with some hand work, you may be able to save the origami.
Some advice:
- Do tests with small prints, otherwise your 3kg will disappear soon. A
- Test one change (maximum 2) at a time.
- Ensure your plate is clean (dish soap and mild water are truly black magic).
My first guesses would be:
-
z offset and flow rate - I only saw this wavy pattern in non-BL printers, and many times, it was related to the first layer flow rate and the z-offset. Did you calibrate the flow rate? If you follow 3Dtech settings, the z offset is -0.1mm, correct? Also, you have a higher thickness in the first layer, which may have helped with the filament squish.
-
temperature and cooling - it seems that higher temperatures helped. You may verify if 5ÂşC (up/down) improves or not. Regarding cooling, check if the surfaces exposed to the aux fan look better or worse.
I do not doubt that fine-tuned settings can significantly improve print quality. Nevertheless, the generic PETG settings and a default printing profile (e.g. 0.16mm High Quality) should work fine.
2 Likes
Hi and thanks to everybody, I just wanted to make an update.
1- settings worked wonderful with other colors, most probably main problem was filament production, since it is a little bit old.
2- I solved adhesion problem with brim thank you so much for idea it is also very very good solution for my problem
3- other colors instead of grey worked very well without brim. I have already completed 6 more prints with them.
Thank you all
2 Likes
Glad to hear it worked out for you!
This topic was automatically closed 2 days after the last reply. New replies are no longer allowed.