Hello everyone! As it says in the title, I very recently bought my first 3D printer, the Elegoo Mars 4 Max. Two days ago, I did my first test print, and it came out pretty good (although maybe a bit too hard, but details looked sharp). The only problem was that I somehow got an error message in the end ("error printing file data exception"), but the print seemed to have finished, so I didn't really worry too much.
I was pretty happy, so yesterday, I tried printing some more. I tried to print some exposure test files (3DRS starship https://3drs.com/pages/3drs-starship-resin-calibration-test and Cones of Calibration https://www.tableflipfoundry.com/) after slicing them with Chitubox. No error message this time, but the prints failed very early. Can anyone help me figure out what the problem might have been?
Here's some additional info:
For the first test print, I did not do any slicing or calibration, I just used the .goo file that came with the printer.
Cleaned the build plate with IPA and paper towel after first print
Did not clean or empty the Resin Tank after first print
Did not level the build plate again
24 hours between first and second print
I stirred the resin a bit before the second print, but maybe not enough
I don't know what the exact temperature was yesterday, but it was still pretty warm.
In Chitubox, I changed the settings to my printer, then downloaded the PDF with the settings for my printer/resin combo (Standard 2.0 grey) and put them in. I then dragged the .stl files into the window and sliced the files, exporting them as .goo files. I then copied the .goo files onto the USB stick and plugged it into the printer.
Failed prints: https://ibb.co/mvycmtc
Successful print: https://ibb.co/Jv8gS2D
Print settings: https://ibb.co/5rxS0WK
Print project: https://ibb.co/z85kNXw
I’m not 100% sure because I’m fairly new as well but I’d try going with 25 seconds for the bottom layers and adding a bit of wait time before lifting.
It looks like your bottom layers did fine but maybe the normal layers didn’t adhere properly to the bottom layers. That could explain why you had some sticking to the FEP.
I’d also make sure the FEP sheet is is good shape. No big scratches or dents.
Was the part really completed (as in finished,) or did the machine keep going after it failed?
I’m wondering if you lost adhesion to the build plate, and it stayed on the tank’s floor.
One cause of this is the area on the build plate is lower than the area of the active layer- a common solution is to angle the part and use tree supports, so the layer cross sections are thinner
Thank you for the comment!
You can see the parts in the pictures in the post. Yes, as far as I can tell, only a few layers were printed, then I lost adhesion. The build did stay on the tank's floor, from which I had to scrape it off. The machine kept going until "finished", but did not print anything for more than 90% of the printing process.
I will try angling the parts next time, did not think it was necessary since the first test print, which was not angled, went so well.
It’s all kinda relative and depends on the part- large shelf like overhangs tend to be where it’s happened for me.
That said there might also be something else going on that is impacting plate adhesion, but that’s the direction I would start looking.
https://lemmy.world/comment/2803744 isn't wrong, but there's definitely more going on here. Both the cones and starship are also test prints and shouldn't need any additional supports or editing to print. At least as far as i'm aware.
Thanks for the suggestion! Just trying to understand, why would reducing the exposure time for the bottom layer help with adhesion?
Reducing the time won’t help with adhesion to the build plate but an overexposed layer might make the following layer less likely to adhere correctly. I always do 25sec on my bottom layers and never have adhesion problems so I figured it could work for you too.