Rear of full bed print rippling
I'm trying to print a full sheet print (a dry box for my filament) and found that the rear 20 or so mm rippled in an odd way. This is my first full sheet print with my Core One + (I assembled). Since this is near the rear exhaust fan, could this be an airflow issue or something else that I assembled wrong? Any advice on what could be causing this is greatly appreciated. Note: The top vents are opened fully and the slicer used all the default settings.
RE: Rear of full bed print rippling
I first thoughts are that the print surface is not flat in the back. In my experience the three most likely causes are:
- The print sheet is stuck on the threaded surface of the back alignment pins of the head bed and thus not parallel with the heat bed in the back. This could exceed the range of the Bed Mesh Adjustment algorithm on the very back edge. This happens all the time on my large footprint printer.
- there is debris under the build plate in the back
- the build plate is skewed in the back. You try repeating Z-alignment calibration and print again.
This looks like warping. Turn the part over - are there signs that the back partially detached from the print sheet?
The two common causes are:
Drafts, the Core one is less susceptible than earlier machines but the breeze from an open door might still cause problems.
And a dirty print sheet - especially fingerprints around the edges of the sheet. Look up the many threads on here about sheet cleaning.
Cheerio,
RE: Rear of full bed print rippling
I reran the z-axis cal and made sure the bed was completely flush and aligned with the sides. I also closed the top vents halfway (I'm not sure what it should be for PLA). No issue on the next print (other than my filament needs to be dried out, hence why I'm making this part). Thanks for the advice.