The problem is that I don't want to use supports. I would like to know how I can change the starting point of the bridge.
What about printing this model flat on its back? Then there are no bridges, and no drooping spaghetti? Just rotate it 90° in Cura.
Otherwise, if you do not use support, then on the highest point of the bridge, the filament will allways sag because a molten plastic (liquid) can not keep its shape without support. It needs a base to glue itself to, such as a solid previous layer.
I am not sure what you mean by the “buildup of filament”?
If you are seeing drooping lines of filament for the first few layers of the bridge, you may need to enable supports.
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