Potential uneven heating of the bed.
I just got my Core One L few days ago, and all the prints i have done before the one with the issue have printed perfectly, but all of them have been printed in the center of the bed.
Today I wanted to take advantage of the large bed, and print multiple parts at the same time. 90% of the print is perfect, but 10% of it got curled up:
Green is OK, Red is rolled up:
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Material: PLA Prusament - Pristine white
All 3 parts have the same settings (just copy/pasted them in the slicer)
Nozzle diameter: 0.4 mm
Layer height: 0.2 mm
Infill density: 10%
Bed temperature: 60 °C
Nozzle temperature: 225 °C
Printer firmware version: 6.5.1+12574
The next print of the same part, but only 1 and in the center is perfect as well (same settings, just deleted 2 of the objects, and re-centered).
As in the title, i suspect it is uneven heating of the bed, but no idea how to check/fix this.
Anyone have any ideas?
RE: Potential uneven heating of the bed.
Could the areas where the print warped, be the areas where you handle the build plate?
Finger prints are excellent release agents...
Simply washing the build plate at the sink, with hot water and detergent may be all that you need!
Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility.Location Halifax UK
RE: Potential uneven heating of the bed.
Ok, spend a day experimenting and found how to fix it.
First, @JoanTabb thank you for the suggestion, your idea totally helped, but did not solve my problem fully.
As many things in life, the problem was not one thing but a bunch put together.
What i did to fix it:
1. As suggested by JoanTabb, i have cleaned the surface.
2. I noticed that when doing the infill (Gyroid), the printer was vibrating a lot more than what it looked ok, so I stabilize my table.
3. I noticed that the separation from the bed happened on the thinnest part of the print, but not to the thick part, so I added Brim to stabilize it.
After all 3 the last print was almost perfect. Currently playing around with the brim size.
Hope this can be useful for someone else.
RE: Potential uneven heating of the bed.
I have noticed the same as you. Warping only in the front, even further away from the edge. My assumption: For PLA and PETG the chamber fan of the C1L is always running creating a constant draft of cool air in the front that causes warping. As soon as I disabled the chamber fans or partially closed the top vent the warping was gone. To rule out warping from drafts you can try using a draft shield. This not only protects your print from drafts but also shows you where the draft is in case you have one. Because then it will warp the draft shield exactly in the spot where the draft is. :3
Cheers
RE: Potential uneven heating of the bed.
I rarely print PLA but when I do I turn off the chamber fans (filtration blower in my case) and open the door.
RE:
I've also now potentialy seen this leading edge issue. PLA Pro. Granted I can make some design revisions, but they both failed at the same place. The plate was clean
RE:
I solved this problem
The issue is the chamber venting 🤯, the moment you turn off the chamber fans and close the vent, everything sticks and also doesn't warp and lift. Why these vents are enabled by default is 🤪. My Mk3S had the lack table enclosure, which held the heat and everything printed great, still does.
Chamber at 45/47 C with no issue.
For PLA & PETG: Set filament chamber nominal to 0, will shutdown the exhaust fans. You'll need to manually close the vent or edit the custom g code to not open the vent.