OK, so here's what I want to do...help?

[JTNOTCH]

Ok, so here's what I want to do...

I am measuring a part that is cut from a forging. The dimensions of the part are taken from the centerline of the forging web. The thickness of the web varies as much as .015.

I want to have a line in the program that pops up and asks for the thickness of the web, then after the operator puts in the proper thickness, the CMM recalculates its position according to the operator input.

Can anyone help me know how to do this??

Thanks
Jim Talbert

[JamesMannes]

Don't know if I'll have an answer for you but want to ask a few questions first...
1. When you say "web" is that similar to "parting line" in an aluminum die casting?
2. Secondly, if that is what it is, are you sure that the actual "web" is what the print intends for you to use as a datum? Or does that line at the "web" reflect a mid point from one side of the forging to the other?


Just trying to get a feel for what your trying accomplish.

[JTNOTCH]

The web runs the same lines as the parting line, but is in the center of the part.
The formation of the part is 'H' shaped, and the print calls out the centerline of the web as the datum of the part.
Odd, but that is what the engineers said is correct.
Jim

[tlnzz]

Why not measure a line on each side of the web and construct a line at mid point to measure from? No entry needed. tlnzz

[Lee Johnson]

I would create a point on each side and do a midpoint to find the center. then realign to the midpoint . No operator input needed. you can set the point at the exact x y z location you want or use a radial location using polar coordinates

[JTNOTCH]

The configuration of the part is such that both sides can't be gotten to without a very complicated fixture.
~7-7.5 inches long, H shaped through the middle, horizontal transverse cylinders on each end for pass through of rods.
The cylinders on each end prevent getting to the under side of the part, and the depth of the 'H' section is .340 deep with only .75 width across the flat.
Thanks for the input so far, any other ideas?
Somebody out there should know a way to do this...I think

[T Miller]

Not sure the only thing that comes to mind is a generic feature with the input as a variable . not sure you could use something like that or not

[JTNOTCH]

Not sure the only thing that comes to mind is a generic feature with the input as a variable . not sure you could use something like that or not

That's what I'm looking for, does anyone know how to do that?

[T Miller]

just assign a variable to the c1.input
C1 =COMMENT/INPUT,enter dim
ASSIGN/V1 = C1.INPUT
F1 =GENERIC/POINT,DEPENDENT,RECT,$
NOM/XYZ,100,0,0,$
MEAS/XYZ,V1,0,0,$
NOM/IJK,0,0,1,$
MEAS/IJK,0,0,1

[JamesMannes]

Couldn't you make an input comment, assign that value to an assignment, and then input that assigned value to the thickness box? I haven't used thickness really but I thought you could input variables?

[dccfreak]

Thickness Box

James,

Are you referring to the thickness box in the auto features? If so, then absolutely you can assign variables to any of the auto feature numerical inputs. I use that alot on many of my stamped parts that have a bunch of variation when it just don't make sense to use the on error type features. And sometimes for select-case type scenarios. It just doesn't seem to work too well for measured features.

[VONDY]

Insert
Dimension
Keyin ( Insert Value Into 'actual' ( Select 'none' )
Assign/v1=d1.meas
Create
Generic Point Using Assign Val. In Appropriate Axis.
Align And Translate To This Gen. Pt.