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[vfrride]

The most difficult thing for me to learn/understand are the best settings for printing. It seems like different spools of material even from the same vendor need tweaking for speed and temperature.

[TravisP]

designing parts with "build for printing" ideas in mind.

[mliecah]

Designing the 3d models with CAD

[1rtom]

How the slicing software works. I would like to know how to modify it.

[Razer0901]

Hello everyone,
What was/is the most difficult thing for you to learn/understand about 3D Printing?
The hardest thing for me to learn is designing a Delta printer. Delta printers seem to follow a different mindset compared to standard Cartesian printers. Which seem more logical.
-Razer0901

[john.nielsen]

Open space inside the object being printed so it is lighter

[theP13RC3]

I still can't get my bed auto-leveling to work... I think the issue is that my bed gets pushed down by the probe differently in different areas (my guess why being the asymmetric support of 3 bearings in the Graber i3/Prusa i3 design), so the bed is never leveled at all... Any advice?

[Tqx]

im still learning how to get a decent quality print. my printrbot simple is in the constant process of modification.

[Cadeamon]

Why Makible would offer to sell me a printer but then just keep my money instead.

[LucidMovement]

Getting my printer to not die horribly in the middle of a print....still working on that actually.