How to print a torus shape?

[smtred]

I've been fighting with my settings trying to print a torus. The lower half of the print has a steeper angle than that of the top half. The top prints flawless yet I can not for the life of me figure out how to acquire that accuracy for the lower. I have the Rev E, Printing at .5 width, .2 height, 225c, 65c, R3PKORD filament. No problems with adhesion my bed is perfectly level.

[insta]

Shortest answer: two halves, split horizontally, glued together

[smtred]

Thanks for the quick and short however, that answer makes me a little disappointing. I'm working on a production run based of that shaped. So that would not be an option for me. Maybe alter the model that I am printing to compensate?

[insta]

Overhangs are a hot-button item for 3D printing, and there's little you can do about it, except dual-extrusion (which is NOT easier than split & glued).

You'll need to keep any angle at 60 degrees or less, if you have fantastic cooling. 45 degrees or less with the stock cooling.

Could you print one split, and resin-cast it?

[smtred]

I'm running the stock cooling system right now. Would It be worth a shot to print a new fan blower to channel the flow to the print? I've not done any type of resin casting before. It wouldn't be applicable for me I dont think either.

[insta]

Can you post a picture of the torus you're trying to make? Why doesn't casting or split-and-bond apply? 3D printing is just a tool, it's not magic.

[ednisley]

I'm working on a production run based of that shaped.

The machine you've chosen can't produce the item you've specified. It's not a fault of the M2, because no fused-filament 3D printers can print over thin air, which is what the bottom side of a torus looks like

You can choose:

• A different 3D model: extensive support material with manual removal
• A different 3D printing machine: dual extruders with soluble support material
• A different production technique: printing halves and assembling
• A different 3D printing process: Shapeways laser-sintered powder
• A different production process: resin-casting in molds

What you can't do is make a single-extruder fused-filament printer produce a good surface on the bottom of a donut. You can make the bottom look better with extensive manual intervention, but it will never match the top surface.