Angle dimension

[Lubo Jocic]

Good morning

I have turbine blade part. I measuring angles on both side of blade root (dovetail), on concave side,on convex side and on trailing edge and leading edge also. It means 4 angles on two pressure flanks. Question is, if I had set on these 4 angles for report, all 4 are OK. After I'm run program one of them is on oposite direction. If I try to put it on same angle like a new, it appears for me on right direction. I don't understand why? I'm using lines for measure these angles.

Any help will be appreciated.

Lubo

Here is sample:

[FONT="Arial"]DIM ANGL8= 2D ANGLE (TRUE) FROM LINE LIN_LE_CC_LARGE TO XAXIS ,$
GRAPH=OFF TEXT=OFF MULT=10.00 OUTPUT=BOTH
AX NOMINAL MEAS +TOL -TOL OUTTOL
A -45,00,00 -45,02,52 0,05,00 0,05,00 0,00,00 -#-------
DIM ANGL4= 2D ANGLE (TRUE) FROM LINE LIN_LE_CV_LARGE TO LINE LIN_X_AX ,$
GRAPH=OFF TEXT=OFF MULT=10.00 OUTPUT=BOTH
AX NOMINAL MEAS +TOL -TOL OUTTOL
A 45,00,00 44,56,30 0,04,59 0,04,59 0,00,00 -#-------
DIM ANGL15= 2D ANGLE (TRUE) FROM LINE LIN_LE_CV_LARGE TO LINE LIN_X_AX ,$
GRAPH=OFF TEXT=OFF MULT=10.00 OUTPUT=BOTH
AX NOMINAL MEAS +TOL -TOL OUTTOL
A 45,00,00 45,03,30 0,04,59 0,04,59 0,00,00 -------#-
DIM ANGL6= 2D ANGLE (TRUE) FROM LINE LIN_TE_CC_LARGE TO XAXIS ,$
GRAPH=OFF TEXT=OFF MULT=10.00 OUTPUT=BOTH
AX NOMINAL MEAS +TOL -TOL OUTTOL
A -45,00,00 -45,02,49 0,05,00 0,05,00 0,00,00 -#-------
DIM ANGL2= 2D ANGLE (TRUE) FROM LINE LIN_TE_CV_LARGE TO LINE LIN_X_AX ,$
GRAPH=OFF TEXT=OFF MULT=10.00 OUTPUT=BOTH
AX NOMINAL MEAS +TOL -TOL OUTTOL
A 45,00,00 45,02,54 0,04,59 0,04,59 0,00,00 -------#-[/FONT]

[Virgil UK]

Just guessing - Could it be the direction of the line when it was created - your question is a little vague.

[Lubo Jocic]

I'm check construction of all lines, it has same direction, same vector. Ther are two lines on concave side. One on trailing edge and one on leading edge. Same case is on convex side. Together 4 lines.
The vectors on CV side are: 0.7071054,-0.7071081,0 for both lines.And the vectors on CC side are: 0.7071068,0.7071068,0 for both side.
I'm just wondering whats happen if I puting in angle dimension to program, and first time appears on screen results angle like 44,51,51. And after I run program once again and result is 45,08,09. This is exam for same line, it means same angle. I'm little bit confused. Which result is correct.