Does anyone have any suggestions on verifying veneir micrometers? If a mic is only .003 or .004 off, it is easily caught. The marks on the mic will not line up. But, if is .025 or .050 off, it could be easily missed.

I have the huge problem of two gage techs. mis-reading the same mic, that was .025 off, at two different times. I believe the problem was repetition of verifying micrometers on the shop floor over two to three hours straight.

The operator didn't know the mic was off and ran 675 parts. I now have to come up with answers and a corrective action.

Can anyone help!!

Thank you
Kat

It seems that your options would be to either improve the competence of the people or improve the readability of the measurement system.

For the cost of the nonconforming parts, I'm sure you could have easily paid for digital micrometers...

Does anyone have any suggestions on verifying veneir micrometers? If a mic is only .003 or .004 off, it is easily caught. The marks on the mic will not line up. But, if is .025 or .050 off, it could be easily missed.

I have the huge problem of two gage techs. mis-reading the same mic, that was .025 off, at two different times. I believe the problem was repetition of verifying micrometers on the shop floor over two to three hours straight.

The operator didn't know the mic was off and ran 675 parts. I now have to come up with answers and a corrective action.

Can anyone help!!

Thank you
Kat

Kat,

The .025" error and the 0.5mm error in reading micrometers is fairly common.
This can depend on the way the sleeve scale is designed.

Here is some info (http://www.auto-met.com/mitutoyo/how_to_read_micrometers.htm) that can help to retrain your gage technicians. It is really a competency issue.
I personally grew up with these types of micrometer. In my view still the most reliable. Some may disagree with me. That's fine. ;)

Stijloor.

I personally grew up with these types of micrometer. In my view still the most reliable

Agree. We belong to the 'Analog' age! :lol: :lol:

Remember your slide rule?

Thanks to everyone for all your suggestions. This will help me alot in my training.

Kat

Agree. We belong to the 'Analog' age! :lol: :lol:

Remember your slide rule?

I still have mine! I must admit that I progressed to a calculator! :D

Stijloor.

For the cost of the equipment (compared to the costs of those parts, sorting, messing with competence, etc.), I'd buy some digital mics.......

I still have mine! I must admit that I progressed to a calculator! :D

Stijloor.


does it come with the "green numbers"??? the one which can be substitute as a "flashlight", just press all the "8"' and it will bright up the room.......... in green of course ;)


back to the topic...


if the user is not that careful in using the mic, its better to upgrade as said by the peeps. but if the user highly competent in using such tool, its ok to be analog.

there are some cases, that "human" are the one tends to be less accurate and not the tools :)

For the cost of the equipment (compared to the costs of those parts, sorting, messing with competence, etc.), I'd buy some digital mics.......

I agree. Unless you are working in an extremely oily or dirty environment, digital micrometers and calipers all but eliminate this error. And I also agree that the cost is generally covered by eliminated the scrap overhead you mentioned. They can also be read much faster, increasing productivity. Training is also much easier.

Some may love the challenge of the retro vernier, but I have witnessed seasoned "highly competent" professionals making classic reading errors that cost dearly. I would keep them in the garage - or Smithsonian.

Thanks again for all the suggestions. It is very helpfull.

Kat.