Hello,
I am evaluating the equipment in our inspection department. I am trying to do a simple 10:1 ratio sanity check on some of the equipment we use for tight tolerance parts (.001 or less). We do a lot of it for size and position of features.
I've read a lot of literature about the ratio and I'm confused about what number to use for the ratio: resolution of the device? Bi-directional accuracy? Total accuracy range (double the bidirectional value)?
For example. In the Mitutoyo catalog there is a simple OD mic.
Resolution: .0001 (vernier scale)
Bi-directional Accuracy: +-.0002
Total Accuracy range: .0004
None of the literature I've read is explicit about which value to use. They say interchangeably: resolution, accuracy, precision, etc.
I am leaning towards resolution of the device. But then I'm not sure if that accounts for the accuracy, which is always larger than resolution.
Any clarification would be appreciated.
Thank you.
I am evaluating the equipment in our inspection department. I am trying to do a simple 10:1 ratio sanity check on some of the equipment we use for tight tolerance parts (.001 or less). We do a lot of it for size and position of features.
I've read a lot of literature about the ratio and I'm confused about what number to use for the ratio: resolution of the device? Bi-directional accuracy? Total accuracy range (double the bidirectional value)?
For example. In the Mitutoyo catalog there is a simple OD mic.
Resolution: .0001 (vernier scale)
Bi-directional Accuracy: +-.0002
Total Accuracy range: .0004
None of the literature I've read is explicit about which value to use. They say interchangeably: resolution, accuracy, precision, etc.
I am leaning towards resolution of the device. But then I'm not sure if that accounts for the accuracy, which is always larger than resolution.
Any clarification would be appreciated.
Thank you.