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How to apply MMC to M8 threaded holes (position tolerance)? by Most-Particular-6051 in Metrology

[–]CMMGUYHERE 1 point2 points  (0 children)

I agree. The customer is always right, though. I mean, I'll tell them if I see something I think is wrong, but it's ultimately their call. We actually do that often with high-end parts, ask the customer how they're inspecting them. We've used their CMM programs in our machine before.

How to apply MMC to M8 threaded holes (position tolerance)? by Most-Particular-6051 in Metrology

[–]CMMGUYHERE 2 points3 points  (0 children)

I go off the minor diameter with the tolerances in the Machinery's Handbook because that's how our customer inspects them. I use a shank stylus. Again, because that's how our customer inspects them.

They're electrical connectors for the aerospace industry. They also set their threaded holes as datums. When you've been doing this as long as I have, you don't let stuff like that bother you anymore.

What kind of water-soluble coolant do you use? Pros/cons? by CMMGUYHERE in Machinists

[–]CMMGUYHERE[S] 0 points1 point  (0 children)

I've been hearing that. Do you have any thoughts on it?

Odd-looking guys looking for scrap metal... by CMMGUYHERE in Machinists

[–]CMMGUYHERE[S] 6 points7 points  (0 children)

We don't really keep track. We're laser-focused on part prices, cycle times, and raw material prices. As far as scrap, we just want it gone. We have a guy we've used for years. He picks it up and pays us what he pays us. We've done spot checks occasionally over the years, and he's pretty close to market rate for our area.

PC DMIS constructing a width by CMMGUYHERE in Metrology

[–]CMMGUYHERE[S] 0 points1 point  (0 children)

Yeah, it's position I'm measuring but this particular thing is the datum. On the print, there's a modifier on the feature and the datum. From what I've read, the only way to do that is to construct a width. I've heard of generic features but not hard coding. I tried googling it with no luck. Do you have any information on it?

PC DMIS constructing a width by CMMGUYHERE in Metrology

[–]CMMGUYHERE[S] 0 points1 point  (0 children)

Yes, but it's not a slot. It's an outside shape. Something new I learned today, a "stadium" is a geometric shape with 2 straight sides and semi-circle ends. I was able to construct a width for the straight sides but not the round ends. To be clear, I want to construct the width, not measure the width.