Measuring to the High Point

[kv802]

I am trying to measure the distance from a feature on the side of a plastic part to the highest point on the top of the part.

Can someone let me know if I am on the right track?
1. Probe the points on the high surface.
2. Dimension the Z value of each point.
3. Create an array out of the measured Z values.
4. Write an Expression to find the MAX of the "Z" value in the array.
5. ??

Now I am stuck. How do I get PC-Dmis to report the distance, parallel to the Z axis, between this high point and the point on the side feature?

Thanks in advance for your help.

Keith

[kv802]

I am using PC-Dmis v3.7 MR2

Thanks,
Keith

[dccfreak]

You can either use a generic feature > point and place the variable into the measured z value in the feature text in the edit window, then dimension this generic feature. Or, you can use a construct point and place the variable in the z value there.

So if your assignment is V1, V2, whatever, in the edit window you would go to the measured values text line for the constructed or generic feature and replace the z value with V1 or V2 or whatever your array assignment happens to be called.

Using variables in measured features is a very handy thing, it works very excellent in auto features if you happen to have several parts that are identical but, have a slight feature difference. You can use comments and select case statements to simplify programs.

[mcb967]

ok,very good.but I don't understand.I am come from china.
I can't speak English.

[AJDean]

Ere ya go KV

[david phillips]

High Point

Why not Use Auto Feature High Point?

[Brianz]

Max Height

Here is something using an assignment and a array ...



MOVE/CLEARPLANE
H1 =AUTO/SURFACE POINT, SHOWALLPARAMS=NO
THEO/19.5024,0,1.735,0,0,1
ACTL/18.8379,5.0476,1.7346,0,0,1
TARG/19.5024,0,1.735,0,0,1
H2 =AUTO/SURFACE POINT, SHOWALLPARAMS=NO
THEO/19.5371,0,1.735,0,0,1
ACTL/18.8714,5.0566,1.7308,0,0,1
TARG/19.5371,0,1.735,0,0,1
H3 =AUTO/SURFACE POINT, SHOWALLPARAMS=NO
THEO/19.4912,0,1.735,0,0,1
ACTL/18.8271,5.0447,1.7333,0,0,1
TARG/19.4912,0,1.735,0,0,1
H4 =AUTO/SURFACE POINT, SHOWALLPARAMS=NO
THEO/19.4912,0,1.735,0,0,1
ACTL/18.8271,5.0447,1.7332,0,0,1
TARG/19.4912,0,1.735,0,0,1
ASSIGN/HGHT = ARRAY(H1.Z,H2.Z,H3.Z,H4.Z)
ASSIGN/ZHGHT = MAX(HGHT)
HGHT1 =GENERIC/POINT,DEPENDENT,RECT,$
NOM/XYZ,0,0,1.735,$
MEAS/XYZ,-461.0236,329.1135,ZHGHT,$
NOM/IJK,0,0,1,$
MEAS/IJK,-0.0003,0.0007,1
DIM LOC6
AX MEAS NOMINAL +TOL -TOL DEV OUTTOL
Z 1.7346 1.7350 0.0050 0.0050 -0.0004 0.0000
END OF DIMENSION LOC6

Brian

[rangerboat72]

Why not Use Auto Feature High Point?

I don't believe that option is available in 3.7mr2 is it?

[david phillips]

Auto feature high point is the last item in point menu. 37 MR 2

[kv802]

I want to say thanks for all the excellent advice. And I can't wait to try out that sweet looking algorithm by AJDean - THANKS. Seeing this opened a large door into new programming possibilities.

Regarding the Auto High Point... I was vaguely aware of this Auto feature. I have never used it and I did not bother messing around with it because I was trying to find the high point of a 2" dia cylindrical plastic part with a wall thickness of just .030" at the top. There were some roundness issues to deal with as well.

[AJDean]

Anytime KV, your welcome ......... nice to be able to help