Your original rotation is fine. The infill is loosely attached to the model, and designed to be removed after the print is complete. It’s not always required to print successfully. If that model was smaller, say 2cm x 3cm, the v1 would likely be able to bridge end to end well enough that the supports wouldn’t be required. But at (I’m guessing here) 8cm x 10cm, that’s not likely to print well without support. You could always try it though. PLA is cheap and biodegradable*, so a failed print isn’t something to worry about overly much. If you want to disable supports, you’ll have to customize a print profile to disable it. The default support is “Touching Buildplate”, so it doesn’t build supports on top of the model. That’s why your rotated part didn’t have infill. If you changed supports to “everywhere”, the second rotation would also have infill.
Getting the infill out and a smooth finish may require a bit of elbow grease though. The surface won’t be as smooth as if you didn’t use infill, so you generally want the infill in the “inside” not the “outside” Depending on the print, that may or may not be possible. I find the easiest way to remove it is to use some needle nose pliers to crush all of the supports, then try to gently pull it out in one piece. There’s as many techniques as there are people 3D printing, and the forum is full of people asking about better finish after supports. A bit of sanding wouldn’t hurt either.
Snapmaker has a guide for setting up Cura, and it looks like you already followed it. I’ve been told that the negative Xmin/Ymin is expected, but I don’t remember why. My Printhead and Extruder Settings match what you have. I am using some better Start/End GCode created by WilliamBosacker, but it’s by no means required.
Once you have the printer setup, you do have to create some profiles. I copied the Luban Fast Print, Normal Quality, and High Quality print settings, then created a few more. If you’d rather start with something, here are the 5 print profiles I use.
Cura Snapmaker Profiles.zip (4.4 KB)
- biodegrading PLA takes some special equipment, so it may or may not be available in your area.