iv printed tons of big building models..
my best tips would be....
_ print your first layers nice and slow.
- make sure the first layers are really flat and squeezed a little against the base.
- have good tape down..really tight to the print base.
- use lots of brim... i normally have 20 in the expert settings
- turn off the coolng fan for the first layers
- dont print to hot.. 220 should be fine for most pla
that normally gets a good model or atleast a flat model ;-)
It's common for large prints to warp, as the plastic cools it contracts causing the sides to peel up.
What helps without re-designing is:
-active the brim option
-Clean your tape with some alcohol it'll stick like mad, most likely ruining your tape.. but it will stick well.
-try reducing your active cooling if possible
More effective solutions I find are:
-design relief spaces in your object if possible (little square/pyrimid cutouts) on the bottom if you don't need a perfectly flat surface. good for halfing parts and gluing them together.
-round/chamfer your sharp, convex corners. Sharp corners tend to warp the most.
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