Fails: Gage R&R

I know of a company that did the following:

Spent $600K on a custom CMM that needed to be in a lab environment. They built a room for it and purchased a sub-standard climate system.

The CMM failed Hex's calibration because of temp fluctuation in it's room. Hex put a sticker on it that looks identical to a calibration sticker on it & told the manager that the machine failed and should be used as reference only. They also put this on the paperwork. (Hexagon did nothing wrong).

Manager (who was in charge of getting the CMM & room & everything up and running) told everyone the machine was good to go ("it has a sticker!!!" was the extent of his brain cells rubbing together) and they used it for two months measuring aircraft parts (nothing ever left the facility). They got all confused when the parts made it to final inspection and they were getting rejected left and right.

LONGGGG story short...the company wanted the parts to be re-measured on the new CMM and the Gage R&R was absolutely laughable it was Ray Charles was measured it with a ruler

The room was figured out, the machine was then calibrated, all is now well. It was a MASSIVE pain for all involved

Results:

Zeiss Contura G2 CMM was installed in front of a bank of windows about 12' wide and 12' high. In Texas.

Upper upper quality manager in charge of the decision would not change things in the planning stage, despite many many warnings of the effect of the sun on the CMM.

Had to build a wall over the windows after the install, after drastic temperature variations were seen across the measuring volume.

Also had to knock a giant hole in exterior brick wall to bring in the custom cradle that the machine rested on.

(not really gage r&r, but the problems arose during the instrument validation process performed in medical companies)

Not machining quality related but, with my tire business, we have a calibrated check station to check customers tire gages. We usually see about 2 PSI off but last year we saw two gages that were reading 12 PSI high! That is huge when most pressure changes (due to wear and rider input) are 1 PSI. Pressure adjustments on my personal bike are about .5 PSI and, yes, I can tell the difference when riding.

Not machining quality related but, with my tire business, we have a calibrated check station to check customers tire gages. We usually see about 2 PSI off but last year we saw two gages that were reading 12 PSI high! That is huge when most pressure changes (due to wear and rider input) are 1 PSI. Pressure adjustments on my personal bike are about .5 PSI and, yes, I can tell the difference when riding.

being 12 PSI off on tire pressure...while doing 150+mph on a motorcycle...that doesn't sound dangerous or anything!

being 12 PSI off on tire pressure...while doing 150+mph on a motorcycle...that doesn't sound dangerous or anything!

Nope... not at all. Both customers were riding 1000s and hitting 170mph on the straights...

Nope... not at all. Both customers were riding 1000s and hitting 170mph on the straights...

y'all are wild :scream;:scream;:scream;:scream;:scream;:scream;

Since the forums won't let me edit my original post, the gage I posted above was actually $5.6K not $4K.

Since the forums won't let me edit my original post, the gage I posted above was actually $5.6K not $4K.

funny because i can currently edit my post #8

funny because i can currently edit my post #8

Yes, very strange. Some I can edit, some I cannot. Like my previous post, I can still edit that one, but not the previous ones.