Weird, though, I asked for "6 inch by 6 inch plate with four bolt holes for NEMA 42 motor frame, centered on plate".[1] That should get me four holes in a square pattern. It got me three holes.
It has no clue what the standard NEMA motor frame sizes are, because I asked for a nonexistent NEMA number and it accepted it. That's an LLM hallucinating, probably. It's not an acceptable feature in engineering.
Trying some prompts:
- "1/4 inch bolt, hex head" -- result is a cylinder with no bolt head.
- "1/4 inch bolt" -- "The prompt must clearly describe a CAD model"
- "1/4 inch threaded rod, 3 inches long" -- same
- "0.25in threaded rod, 3 inches long" -- same
- "Plate, 3in x 5in, with rounded corners." -- same
- "Plate with rounded corners" -- blank result
Now it's too overloaded to do anything.
This is kind of an interesting idea. It's a good project to get a large language model and a constructive solid geometry model on speaking terms.
This needs to be a dialog. Something like this:
> Create a flat plate, 100mm x 300mm x 3mm thick.
> Round corners, 20mm radius.
> Drill four holes in the corners.
> Holes are inset 20mm from edges.
> Holes are 6mm diameter.
> Allow extra hole diameter for standard 6mm screw.
> Round edges of top surface of plate.
Those are all things you can express to Autodesk Inventor through its GUI.
What you'd really like to say is:
> Import this file. Here is a mounting plate for a motor.
OK
> The four holes near the center are mounting bolts for a standard NEMA motor.
OK.
> What motor frame size is it for?
NEMA 42
> Change the bolt holes to fit a NEMA 56 at the same position.
OK. (Drawing changes).