I’m getting a bit disheartened!
Each plate I’m printing keeps having issues I’m not getting very far. This is my latest issue, does anyone know causes this, at a guess I’m assuming adhesion to the bed and it’s possibly curled up a tiny bit from the bottom?
I was having adhesion issues on the bambu PEI plates at first as well. A thin layer of Elmer’s glue stick helps a lot, and helps getting them off afterword’s as well. But ultimately I ended up switching to Kdeavi plates on mine and that made a world of difference!
What temp did you use for the plate? Mine was 70. I’m retrying with 75 this time, added a brim and a good scrub of the bed plate!
Fingers crossed. I wish these issues showed up at the start of a print, not 19 hours and 400g later 
80°c is what I used. For the Kdeavi plate I just leave it at cool plate settings which is 70°
My bet is on over-extrusion. By this part of the print, enough material has been laid down that the part is probably not lifting. Even if it was lifting at first, the squish/overextrusion caused by moving closer to the nozzle should have bled into the infill. At this point, you should be relatively flat and even.
Try calibrating your extrusion multiplier.
I’ve also had great luck with the BIQU CryoGrip Pro Frostbite on both my P2S and H2D and I set the plate temp to 55. I don’t want to admit I’ve gotten lazy and don’t clean them every time but they still hold really well.
With PETG I always get in trouble when the parts are cooling too fast that is when they warp and pull up so it might also depend on the room temps with the A1.
So I didn’t think it was lifting. However under closer inspection, I think it was! I can feel a very gradual change on the flat bottom. It’s very small, and at each point it’s raised, above is where the marks are. My guess is those few mm raised have caused it to lay the filament down, nozzles thst tiny bit too close so drags through it causing the scars.
I calibrated filament with flow and PA before I started. Also did temp towers and fully dried the petg.
Im reprinting the other side. Added a brim and raised the bed temp and gave it a good clean. If it happens again, no idea what I’ll do
Come back here and let us know. Collectively you have a TON of knowledge at your fingertips here! We will help you!
This looks like nozzle dragging. So, as you said, could be the lifting/curling from one side causing the nozzle to strike it later.
Sometimes a heat gun (lightly, and a little at a time) can help reduce discolorations and scarring like that with PETG
Ohhhh I didn’t think of that! I’m hoping it’s actually hidden behind the wheel. Might get away with it! I’ll try heat gun though. It’s physically rough to touch so don’t want it on display!
Love this answer!
Also you can use sandpaper to help remove any roughness. As long as the part fits together properly and is still structurally safe, I would use it. Nothing a little sandpaper and sticker couldn’t cover.
So, the otherside! Alot better. Adhesion was good after the upped temp and clean bed.
Still got issues, this is the finish, it’s got to be a certain light to see it, this pic is worst case. So something to do with top layer
What speed are you using for your top layers?
I think I set it to 150mms from the standard 200. Using the bambu 0.20mm profile that came in the 3mf.
Also wondering do I need to lower the Infill speed. Or increase top shell layers?
One more might help clean that up some. It has helped some of my prints in the past for sure.
Thanks all. Going to give those a try, BUT!
When I unloaded an empty reel I noticed a teeny bit of the plastic strap that hold the refills fell out, this then lead me to think of a partial clog! Did a few cold pulls and some of that plastic was inside! A tiny bit but still guessing it wouldn’t of helped! Just reruning the everything test that we did to sign up. See how it looks and if it’s cleared!
Will never know if it was settings or a clog or a mix of the both!
Something like that can sure cause issues. Hopefully that’s all it was!
So.
Multiple Cold pulls. Recalibrated filament and actually needed to up flow considerably. From 0.96 and went to 1.01! Top layers up, couple speeds down changed to arachne, and did a test corner print. Still not 100% but Much much happier with the quality. But will it be the same when I do the full size print!!
From looking at the first picture to the second I never would have guessed you needed to up the flow rate! You might try tuning your linear advance again now that you upped the flow. That might get the last little bit of perfection you are looking for. But honestly that corner print looks great.
