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Prints Warping Off the Bed
Guys, I need some help here. I just had another print completely fail because they keep warping off the bed. I have had 3 previous 3D printers and have never had this problem, but my V-Core 4 never fails to cause a large print to warp off hte bed, even with PLA. I have never once in my life ever considered using any kind of bed adhesive, but I bought some Bed Weld Original and used it for this print. It made absolutely no difference. I cancelled the print when it was clear that all 4 corners were coming off the bed. When I took the bed plate off, the entire thing just fell off the bed plate while it was still at 60C. Absolutely no adhesion at all. This is also my 2nd bed plate, both the original that came from RatRig with the V-Core 4 and this new one I got from Fabreeko are doing the same thing. They're both textured PEI. What are you guys doing to get prints to stick to the bed?
Some details about the print:
Dimensions: Approximately 150mm x 160mm, rectangular, with 90 deg corners.
Filament: Polymaker PolyLite PLA
Nozzle: 0.4mm
Nozzle Temp: 210C
Bed Temp: 60C
Enclosure is open on the front and top for this print and filament.
Bed plate: Fabreeko Textured PEI. Also tried it with the original RatRig textured PEI.
Z-Offset: Set using baby-steps prior to the print, and saved with SAVE_Z_OFFSET. The offset is set fairly low, filament is pretty squished into the texture of the bed.
The warping occurs at the corners about 1 hour into the print, around layer 20 (about 5 mm high).
I unfortunately do not have a picture. The print has some text on it that I don't want shown.
Some details about the print:
Dimensions: Approximately 150mm x 160mm, rectangular, with 90 deg corners.
Filament: Polymaker PolyLite PLA
Nozzle: 0.4mm
Nozzle Temp: 210C
Bed Temp: 60C
Enclosure is open on the front and top for this print and filament.
Bed plate: Fabreeko Textured PEI. Also tried it with the original RatRig textured PEI.
Z-Offset: Set using baby-steps prior to the print, and saved with SAVE_Z_OFFSET. The offset is set fairly low, filament is pretty squished into the texture of the bed.
The warping occurs at the corners about 1 hour into the print, around layer 20 (about 5 mm high).
I unfortunately do not have a picture. The print has some text on it that I don't want shown.
Solution
OK, I think I got this mostly fixed. It was too much cooling. Reduced normal fan speeds to Min 20% / 80 seconds, and Max 35% / 10 seconds. Changed bridging fan speeds to 40% external bridges and 30% internal bridges. And applied a little more bed glue than before.
This worked well, got the part printed without any warping and it looks quite good.
Note that these fan speeds and times are based on the print parameters given above, i.e. about 18 mm^3/sec flow rate, a 0.4mm nozzle, and mostly long layer times (> 60 sec). If your flow rates are higher, you're using a larger nozzle, or you have small/short layers, you probably will need proportionally more cooling.
This worked well, got the part printed without any warping and it looks quite good.
Note that these fan speeds and times are based on the print parameters given above, i.e. about 18 mm^3/sec flow rate, a 0.4mm nozzle, and mostly long layer times (> 60 sec). If your flow rates are higher, you're using a larger nozzle, or you have small/short layers, you probably will need proportionally more cooling.
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