Bed adhesion issues
Hello,
I am currently trying to print several of these at once.filament clip
If i print one in the center in petg without brim it works fine. Once i fill the bed I notice that for all objects further to the front and also out of centre of the print bed, the front side warps and looses adhesion. The ones further back work fine though. I tried cleaning the textured sheet several times and even added magigoo but the front part still lifts for the objects in the front. I am pretty sure that the sheet is clean there, so I am wondering why the adhesion is so much different.
RE: Bed adhesion issues
Use Dawn Ultra and lots of hot water to clean the build sheet. Avoid using Palmolive or other soaps that contain hand softeners.
Also, PETG sticks better to Satin or Smooth build sheets than Textured.
MK4S/MMU3
RE: Bed adhesion issues
I used the satin one sorry, what I am wonderig is why it sticks in the center but not when put off centre. Both areas have been cleaned the same way.
RE: Bed adhesion issues
Have you checked if the bed is heating where it is not sticking?
RE: Bed adhesion issues
Any chance that there is some small piece of debris stuck on the heatbed itself, causing bad thermal contact with the print sheet?
RE: Bed adhesion issues
Have you checked if the bed is heating where it is not sticking?
I checked this with a cheap heat gun and noticed that with a setpoint of 85 degress the centre shows around 81 and the outer area where I have the adhesion issue has 75, so around 5 to 6 degrees less. I never measured it before so I do not know if this is a "normal" deviation since I think the heating element is in the centre.
RE: Bed adhesion issues
Any chance that there is some small piece of debris stuck on the heatbed itself, causing bad thermal contact with the print sheet?
I removed the print sheet and the front left corner is around 5 degress lower temperature than the centre. The right front side is also a little bit coolre but not that much.
RE: Bed adhesion issues
Print a single flat sheet across the entire bed - something like this : https://www.printables.com/model/876414-universal-bed-sheet-adhesion-test
Examine the result, which should be relatively uniform across the entire sheet. It will also highlight inconsistencies from a possible warped or uneven bed.....
RE: Bed adhesion issues
Hello,
Sorry for the late reply but I was on a business trip for the last weeks. After coming back I checked the bed levelling and noticed that the front left was much lower than the rest. I re-ran the z axis calibration and for now the prints look a lot better. I still have some warping but no bed adhesion issues. I also used a new filament spool so this might also play into it. Thanks for everyone's tips and replies.
RE: Bed adhesion issues
I have the satin build plate. I have to use Geeetech JT16 Glue Stick or hairspray to get my prints to stick. Also a release agent for PETG.
I was thinking of ordering the textured build plate.
RE: Bed adhesion issues
Hi, the only suggestions that come to my mind are:
1. clean the bed;
2. be sure to have a filament in good conditions in terms of humidity absorbed... dry it at about 45° or 50° for 4-5 hours before to print if it is not a new filament;
3. increase a little bit bed temperature;
4. set fans to start only after about 4 layers... (first layers at about 20% fan velocity);
5. add a brim;
6. add a glue stick layer.
These are the first things that comes to my mind to try to have a better adhesion... in my personal experience I found that drying the filament changes a lot the performance.
Ciao,
Alberto.
RE: Bed adhesion issues
I meant I have the smooth PEI build plate. That JT16 Glue Stick is really working well keeping the prints on the plate and as a release agent.
I have the satin build plate. I have to use Geeetech JT16 Glue Stick or hairspray to get my prints to stick. Also a release agent for PETG.
I was thinking of ordering the textured build plate.
RE: Bed adhesion issues
Hello everyone.
I've just converted my Mk4S to core one and since then I can't make a part without warping.
Prusa!!! what's going on?
My beds have not changed, they are cleaned and used as before.
Good day to all
RE: Bed adhesion issues
Prusa!!!
They are not here. Just us users, trying to figure things out.
what's going on?
Hard to tell with the limited information you gave. Based on the forum threads, lack of bed adhesion is not a systematic problem with the Core One.
Which materials are you printing? Are the nozzle, bed and chamber temperatures what they should be? (Setpoints from the slicer as well as actual values; details in the footer of the display.) Does the first layer look good? Any chance that some debris got stuck between the heatbed and the print sheet?
RE: Bed adhesion issues
I just printed a larger beer case in petg and while the back corners look fine the front left and right corners warped like crazy. The bed was clean and PETG was a new spool. A friend of mine printed the same model with his core one in petg and had completely the same issues. As alread said my heat gun shows that the front temperature of the bed is lower by 5 to 6 degrees compared to the center and back.