Finding the lowest point

[Gary McElwain]

I have a Center Post that is formed from a welded tube. The axes is the ID. Two given diameters from two different cones. The setup is not the problem. What I would like help on is this. The end of the tube is where X axes should be set, but at the lowest point. The way the tube is formed. The end of the tube is not real square to the axes. I would like to take a number of points on the end of the tube. Is there a way to for the software or script that someone knows about to find the lowest point. I know you can construct a high point plane. Thanks for the Help.

Sheffield RS50
3.7MR3

[bw_bob]

You could use something like this.........

PNT1 =FEAT/POINT,RECT
THEO/212.946,77.943,-454.551,0,-1,0
ACTL/212.946,77.943,-454.551,0,-1,0
MEAS/POINT,1
HIT/BASIC,212.946,77.943,-454.551,0,-1,0,212.946,77.943,-454.551,USE THEO = YES
ENDMEAS/
PNT2 =FEAT/POINT,RECT
THEO/217.177,77.999,-454.551,0,-1,0
ACTL/217.177,77.999,-454.551,0,-1,0
MEAS/POINT,1
HIT/BASIC,217.177,77.999,-454.551,0,-1,0,217.177,77.999,-454.551,USE THEO = YES
ENDMEAS/
PNT3 =FEAT/POINT,RECT
THEO/227.732,78.11,-454.552,0,-1,0
ACTL/227.732,78.11,-454.552,0,-1,0
MEAS/POINT,1
HIT/BASIC,227.732,78.11,-454.552,0,-1,0,227.732,78.11,-454.552,USE THEO = YES
ENDMEAS/
ASSIGN/V1 = PNT1.X
ASSIGN/V2 = PNT2.X
ASSIGN/V3 = PNT3.X
ASSIGN/V4 = ARRAY(V1,V2,V3)
ASSIGN/V5 = MIN(V4)

[calbritton]

I've had a similar situation where I just took a lot of hits on the surface, look at the x, y, z data in the part program and pick the lowest one and delete the rest.

[inspector212]

You could use something like this.........

PNT1 =FEAT/POINT,RECT
THEO/212.946,77.943,-454.551,0,-1,0
ACTL/212.946,77.943,-454.551,0,-1,0
MEAS/POINT,1
HIT/BASIC,212.946,77.943,-454.551,0,-1,0,212.946,77.943,-454.551,USE THEO = YES
ENDMEAS/
PNT2 =FEAT/POINT,RECT
THEO/217.177,77.999,-454.551,0,-1,0
ACTL/217.177,77.999,-454.551,0,-1,0
MEAS/POINT,1
HIT/BASIC,217.177,77.999,-454.551,0,-1,0,217.177,77.999,-454.551,USE THEO = YES
ENDMEAS/
PNT3 =FEAT/POINT,RECT
THEO/227.732,78.11,-454.552,0,-1,0
ACTL/227.732,78.11,-454.552,0,-1,0
MEAS/POINT,1
HIT/BASIC,227.732,78.11,-454.552,0,-1,0,227.732,78.11,-454.552,USE THEO = YES
ENDMEAS/
ASSIGN/V1 = PNT1.X
ASSIGN/V2 = PNT2.X
ASSIGN/V3 = PNT3.X
ASSIGN/V4 = ARRAY(V1,V2,V3)
ASSIGN/V5 = MIN(V4)

This is the proper way to do what you want. Also this:

ASSIGN/V1 = MIN(ARRAY(PNT1.X,PNT2.X,PNT3.X))

I've had a similar situation where I just took a lot of hits on the surface, look at the x, y, z data in the part program and pick the lowest one and delete the rest.

This will not account for part variation.

[inspector212]

Oh yeah, create a generic point using your variable as the X value and then translate in X to it.

[slesholdofthreep]

IDK if you're trying to avoid using a high point plane but you could use one and change the work plane to ZMINUS (if applicable) to get the low point.
HTH

[Gary McElwain]

Thanks Inspector212 that worked great. We had to figure out the generic point and then how to assign it back to V1. I have 30 parts to measure and this will help. Thanks again.

[craiger_ny]

Might be related to high point of a plane...............