Distance with circumference

[DPINEDO]

Looking for some help with the 1.839/1.849 distance. This callout is not a Cartesian distance . Its asking for the circumference value from point to point. I'm thinking this is going to need some combination of variables. Using 2015.1 CAD. Thanks!

[JEFMAN]

Right !
The angle should be ASSIGN/V1=ABS(PT2.PA-PT1.PA)
The length is ASSIGN/V2=DEG2RAD(V1)*CIRC1.R

[dph51]

Well done!

[vpt.se]

JEFMAN -> mathwiz!

[DPINEDO]

Jefman...worked like a champ! good stuff. Thank you!

[kingsld1]

Just to be difficult.....
What if the diameter is significantly out of round?

[dph51]

Scan the feature, create 3d lines and add them together.

[JEFMAN]

Just to be difficult.....
What if the diameter is significantly out of round?

Like Dph51 said, scan with a little distance between hits, then :
ASSIGN/V1=SCN1.HIT[1..(SCN1.NUMHITS-1)].XYZ
ASSIGN/V2=SCN1.HIT[2..SCN1.NUMHITS].XYZ
ASSIGN/V3=SUM(SQRT(DOT(V2-V1,V2-V1)))
ASSIGN/V4=SQRT(DOT(SCN1.HIT[SCN1.NUMHITS].XYZ-SCN1.HIT[1].XYZ,SCN1.HIT[SCN1.NUMHITS].XYZ-SCN1.HIT[1].XYZ))
ASSIGN/LENGTH=V3+V4

The uncertainty on this method should be approximately half of the density of the scan.

For an open scan, keep only V3...

[AndersI]

There is the feature type CURVE available under constructions, which has a length that can be dimensioned. With measuring points close enough it might give a good approximation.

[JEFMAN]

+1 ! This solution seems to be more accurate than mine (tested off line) ...

[Dsturgeon]

Jefman can I ask where you got those commands from? Is there a big list I don't know about or is it all just hearing from others? Like the deg2rad command

[JEFMAN]

You can download the core manual, chap.26... Print it, read it, and try to find some memories of maths or trig...
Assignments is only a tool box, but a very nice tool box !

ftp://ftp.wilcoxassoc.com/docs/v2016.0manual/ (I'm unable to add the link with "add link" button... )


But it seems to work "alone" !