Any CMM Whizzos on here??
 

I spent 2 hours yesterday banging my head against a couple of engineers who couldn't decide how to measure a feature on a component I'm looking after

Anybody able to give me some advice

Cheers

Tris

Re: Any CMM Whizzos on here??
 

What kind of component?
I should be able to help you :)

Re: Any CMM Whizzos on here??
 

i may be able to help..what is the compnnent?

Re: Any CMM Whizzos on here??
 

Cheers guys

the component is T shaped with the top of the T being curved.
The aim of the game is 2 fold

1. check the radius of the curves - should be 192.5 +/- 0.1 with a profile of 10 micron
2. the 2 curves must be concentric to each other within 0.025

The 2 curves form 2 datums (datii?) from which other key features are measured.

My "beloved" engineers got hung up trying to measure the first curve. They tried to offset by exactly 192.5 but felt that if the radius wasn't 192.5 they would get the wrong answer. This then causes a problem as if the first bit is wrong then the relationship between the 2 curves will be wrong

To my simple mind i'm using "coordinates" (hence the name of the machine :D) so the offset is irelavent (with in reason) as long as I tell the machine where to look for the feature

I look forward to your advice


Cheers

Tris

PS
Sorry I can't post a picture but I'm tied by IPR etc.

Re: Any CMM Whizzos on here??
 

You could PM a picture ;)

What hardware and software are you using? A flatbed with a touch probe?
The offset is irrelevant as you say; it's a coordinate so it's relative.

Re: Any CMM Whizzos on here??
 

Cheers g2d I'm glad ive not gone completly senile!

Yes to flat bed & touch probe
No idea re software

I'll go and bang heads some more when I get back in the office!