ARC length

[GWOLLNER]

Its been awhile since using PC-DMIS and I could really use some help.

I need the ARC length between two points on a radius.

I scavenged some code from you nice people but dont know whats next.

I attached a word doc for reference.

Thanks for any advice. I feel like I need to create a generic feature....


PT1 =FEAT/POINT,CARTESIAN,NO
THEO/<42.655,42.657,-0.75>,<-0.7070611,-0.7071525,0>
ACTL/<42.655,42.657,-0.75>,<-0.7070611,-0.7071525,0>
CONSTR/POINT,PIERCE,,RAD_FEA

PT2 =FEAT/POINT,CARTESIAN,NO
THEO/<-29.968,52.355,-0.75>,<0.496782,-0.8678754,0>
ACTL/<-29.968,52.355,-0.75>,<0.4965542,-0.8680057,0>
CONSTR/POINT,PIERCE,RAD_FEA,

ASSIGN/V1=ABS(PT2.PA-PT1.PA)
ASSIGN/V2=DEG2RAD(V1)*RAD_FEA.R

[JEFMAN]

You could create a generic line, with V2 as length, and then dimension the length only.

[Cumofo]

To derive the arc length you needs;
The arc at any length or segment,but projected to a plane normal, but best as a constructed 360 Circle
A line or for the start arc
A line for then end arc
Both projected to the plane normal

Or

The arc or cylinder
One plane start
One plane end

Stuff like that. Do you see how pc dmemon wants itz constructions spoon fed to it?

[GWOLLNER]

JEFMAN

I don't understand how to create a generic line with V2 as the length. For the Generic construction I chose the options listed below.


>Line
>Measured Values
>Polar
>Independent

The code generated is shown below

F1 =GENERIC/LINE,INDEPENDENT,POLAR,$
NOM/XYZ,<0,0,0>,$
MEAS/XYZ,<0,29.017,0>,$
NOM/IJK,<0,0,1>,$
MEAS/IJK,<0,0,1>,$
DISTANCE/0,0

Thanks for any additional suggestions

[JEFMAN]

I would do it like this :

JEFMAN

I don't understand how to create a generic line with V2 as the length. For the Generic construction I chose the options listed below.


>Line
>Measured Values
>Polar
>Independent

The code generated is shown below

F1 =GENERIC/LINE,DEPENDENT,CARTESIAN,$
NOM/XYZ,<0,0,0>,$
MEAS/XYZ,<0,0,0>,$
NOM/IJK,<0,0,1>,$
MEAS/IJK,<0,0,1>,$
DISTANCE/V2,V2

Thanks for any additional suggestions

[Cumofo]

THis is very cool too:


https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcS3pVasY3chiwpvVErk-rdy1Bka98xFVEXQmuPJw1qACntYgZYa

See if this will get you started, the math can be done in the demon

TK

Example:

ACR LENGTH CODE EXAMPLE.JPG

[GWOLLNER]

I thought this would be easier. Just trying to help a satellite company. I assumed "dimension the length" from post #2 means use the "Dimension distance", but that clearly isn't working for me.



PNT14 =FEAT/POINT,CARTESIAN,NO
THEO/<42.655,42.657,-0.75>,<-0.7070611,-0.7071525,0>
ACTL/<42.655,42.657,-0.75>,<-0.7070611,-0.7071525,0>
CONSTR/POINT,PIERCE,LIN2,RAD_FEA

PNT15 =FEAT/POINT,CARTESIAN,NO
THEO/<-29.968,52.355,-0.75>,<0.496782,-0.8678754,0>
ACTL/<-29.968,52.355,-0.75>,<0.4965542,-0.8680057,0>
CONSTR/POINT,PIERCE,LIN1,RAD_FEA

ASSIGN/V1=ABS(PNT14.PA-PNT15.PA)
ASSIGN/V2=DEG1RAD(V1)*RAD_FEA.R

F1 =GENERIC/LINE,DEPENDENT,CARTESIAN,$
NOM/XYZ,<0,0,0>,$
MEAS/XYZ,<0,0,0>,$
NOM/IJK,<0,0,1>,$
MEAS/IJK,<0,0,1>,$
DISTANCE/V2,V2

DIM DIST1= 2D DISTANCE FROM LINE F1 TO (CENTER TO CENTER),NO_RADIUS UNITS=MM,$
GRAPH=OFF TEXT=OFF MULT=10.00 OUTPUT=BOTH
AX NOMINAL +TOL -TOL MEAS DEV OUTTOL
M 0.000 0.010 0.010 0.000 0.000 0.000 ----#----

I will go back to the drawing board with this offline seat and try the suggestion from Cumofo.

Will report back if it works

[GWOLLNER]

I think Cumofo has a strategy that worked for me. When I dimension the radius it pulled the correct nominal. Will know more tomorrow when they try to run execute online.

Thanks!

[JEFMAN]

I thought this would be easier. Just trying to help a satellite company. I assumed "dimension the length" from post #2 means use the "Dimension distance", but that clearly isn't working for me.



PNT14 =FEAT/POINT,CARTESIAN,NO
THEO/<42.655,42.657,-0.75>,<-0.7070611,-0.7071525,0>
ACTL/<42.655,42.657,-0.75>,<-0.7070611,-0.7071525,0>
CONSTR/POINT,PIERCE,LIN2,RAD_FEA

PNT15 =FEAT/POINT,CARTESIAN,NO
THEO/<-29.968,52.355,-0.75>,<0.496782,-0.8678754,0>
ACTL/<-29.968,52.355,-0.75>,<0.4965542,-0.8680057,0>
CONSTR/POINT,PIERCE,LIN1,RAD_FEA

ASSIGN/V1=ABS(PNT14.PA-PNT15.PA)
ASSIGN/V2=DEG1RAD(V1)*RAD_FEA.R

F1 =GENERIC/LINE,DEPENDENT,CARTESIAN,$
NOM/XYZ,<0,0,0>,$
MEAS/XYZ,<0,0,0>,$
NOM/IJK,<0,0,1>,$
MEAS/IJK,<0,0,1>,$
DISTANCE/V2,V2

DIM DIST1= 2D DISTANCE FROM LINE F1 TO (CENTER TO CENTER),NO_RADIUS UNITS=MM,$
GRAPH=OFF TEXT=OFF MULT=10.00 OUTPUT=BOTH
AX NOMINAL +TOL -TOL MEAS DEV OUTTOL
M 0.000 0.010 0.010 0.000 0.000 0.000 ----#----

I will go back to the drawing board with this offline seat and try the suggestion from Cumofo.

Will report back if it works

Dimension the length means "dimension the length" !
Use Feature location, then select F1, unselect "auto" and select L (for length !)
Hope this helps, you had done the hard part by calculating the length ...

[GWOLLNER]

Cumofo's post worked for me! Thanks for the help guys!

[tking]

You're quite welcome

TK

[Cumofo]

Cumofo's post worked for me! Thanks for the help guys!

cant take credit for that. I stole it from T-King.

[tking]

There's no stealing here, Cumofo! Sharing the joy of life and the pain of the Demon.

TK