Create a tangent plane?

I need to create a theoretical plane that rests across the top of 4 diameters. picture four spokes on a propeller... the plane will rest on the radius of the blade edges closest to you.

i can probe the leading 4 edge radius of the propeller and create 4 diameters.

what next?

pgvsmit over 2 years ago

this is the part. the plane needs to rest on the outside edge (-Y) edge of the four circles
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
JEFMAN over 2 years ago

Create a feature set with all hits*, and then create a tangent plane from it (deppends on the version ,it can be called "primary datum)
* : circ1.hit[1..circ1.numhits], circ2.hit[1..circ2.numhits]...
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
JEFMAN over 2 years ago in reply to JEFMAN

Ths plane will be tangent to hits, not to circles, so if you don't take enough points, it won't be the right one...
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
pgvsmit over 2 years ago in reply to JEFMAN

as in a cloud of points?

and a constructed primary datum plane?

that looks right... never would've guessed "primary datum" would've been the option i needed... id have suspected something like "tangent plane".

but hey, it looks right, and the geometry looks right so im going with it

thx!
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
Matthew Beecher over 2 years ago

The constructed primary datum plane used to be called "tangent plane". I assume the name was changed to show this is typically what you would want for a primary datum plane, if you were trying to reproduce a DRF and a primary datum plane, such as for Legacy dimensioning
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
RobOntario over 2 years ago

I will measure the 4 cylinders, the center lines form a plane, offset Y axis half diameter
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
JEFMAN over 2 years ago in reply to RobOntario

Would give the right plane only if all diamters are the same.....
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel
pgvsmit over 2 years ago in reply to RobOntario

that works if the diameters are nominal... or close enough...
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel