I'd agree with most of your video and I think it was quite well done. But a few further points needed to be mentioned. Due to the way the internal measurement system works it's only accurate to within + or - one count. And the digital type are set up to round off the last decimal place. Most if not all metrology equipment both analog and digital from excellent manufacturers will state in the accuracy specifications about that + - one count. And it may have been good to point out the differences between accuracy and resolution. Far too many think the terms are interchangeable. Resolution is simply how many digits there are to the right of the decimal place. Repeatable accuracy is the important point when buying equipment like this. And that calipers thumb wheel is meant for quick movements. You did mention the point about using a bit extra pressure can take up the slight clearances between the fixed blade and the moving jaw. That will slightly cant the movable jaw. Mitutoyo themselves list the correct method as lightly clamping the fixed jaw and the moving one between your thumb and fingers on the part, or on larger measurements you'd use both hands. But your a bit wrong about not being able to measure finer than 1/10,000 ths of an inch with analog equipment. Joseph Whitworth invented a millioths reading analog micrometer as far back as the 19th century. And Moore Tools were grinding, lapping, and measuring feed screws for there jig borers and jig grinders to millioths of an inch long before the digital equipment was even thought of. And to mention one more, Carl Johansson invented gauge blocks around 1900 that were accurate to millionths as well. Those internal jaws on calipers do an inaccurate job of inside measurements since there's always a narrow flat ground on each jaw. The smaller the hole then the less accurate your measurements will be. Calipers would be the most used tool in my shop so I very much agree with you. Buy good ones that can be trusted. But to be honest if I need better than .005" accuracy then it's time to dig out the more accurate equipment.
Don't store your micrometer with the jaws fully closed. Slight changes in temperature will cause stress in the mechanism and frame. Instead, store the micrometer slightly open. When you buy a new quality micrometer, you will see that it ships in the slighly open position.
Hello GadgetClass. Got my igaging digital cailper today and it's my first cailper. Purchased it on your recommendation. I'm trying to determine if everything is working right. There is a lot of 'play' or 'wobble' with the thumb wheel. Up and down of course as I would expect but in general 'sideways' and all around? Is that correct? Also, your readout window seems well lit in the video. My window is dark. The digits are black but the surrounding portion of the window is the same as when the cailper is off. Is this readout window suppose to be 'backlit' when the cailper is turned on? And, how do you remove the battery correctly? Seems that it is 'stuffed' into a retaining slot... maybe a toothpick to catch the edge? It's my 1st cailper and I've never handled one before.
The Thumb wheel is supposed to be loose. It is designed to only engage with pressure. The looseness keeps one from applying too much torque on the measuring body. You will find this on calipers of all brands.
You forgot to mention that both calipers and micrometers have to be stored with the jaws/spindles slightly open. As far as strange readings are concerned, one can remove the battery and then reinstall. Sometimes the full power down resets the electronics and they then resume working properly. If not, then replace.
Gordon Clarke technically it can be used on either. One can even use 2 anvil adapters depending on the application: www.amazon.com/dp/B00MX6F1PI/?tag=cr38er-20
No. No fractional system is as accurate as decimal measurements, and I promise you that in any precision manufacturing process products are measured in thousandths and tenths (ten-thousandths). For calibration of true precision, systems based on the wavelength of light is used, and gages such as gage blocks are measured in millionths. Accurately. For example: .0001" inch is just barely larger than 1/1024th. Try reading that on a tape measure ;-)
atomkinder67 would be nice if someone would understand my original question. ..but here is the answer : to translate numbers from calipers to tape measure, you have to divide 1 inch by 10. Than u can see what the 2.3, or 8.2...coz we all know 7.5 is =3/4" get it ???
Csaba Farkas Moreover to translate a tape measure number to decimal you simply divide the fraction. Using your .75" = 3/4" example: if you divide 3 by 4 (3/4) you get .75. If you want to just measure in fractions anyways, iGaging's OriginCal now has Fractions. So the Winner of my Caliper Round-Up Now has Fractional Measurement: www.amazon.com/dp/B00KDUD67G/?tag=cr38er-20
I'd agree with most of your video and I think it was quite well done. But a few further points needed to be mentioned. Due to the way the internal measurement system works it's only accurate to within + or - one count. And the digital type are set up to round off the last decimal place. Most if not all metrology equipment both analog and digital from excellent manufacturers will state in the accuracy specifications about that + - one count. And it may have been good to point out the differences between accuracy and resolution. Far too many think the terms are interchangeable. Resolution is simply how many digits there are to the right of the decimal place. Repeatable accuracy is the important point when buying equipment like this.
And that calipers thumb wheel is meant for quick movements. You did mention the point about using a bit extra pressure can take up the slight clearances between the fixed blade and the moving jaw. That will slightly cant the movable jaw. Mitutoyo themselves list the correct method as lightly clamping the fixed jaw and the moving one between your thumb and fingers on the part, or on larger measurements you'd use both hands.
But your a bit wrong about not being able to measure finer than 1/10,000 ths of an inch with analog equipment. Joseph Whitworth invented a millioths reading analog micrometer as far back as the 19th century. And Moore Tools were grinding, lapping, and measuring feed screws for there jig borers and jig grinders to millioths of an inch long before the digital equipment was even thought of. And to mention one more, Carl Johansson invented gauge blocks around 1900 that were accurate to millionths as well.
Those internal jaws on calipers do an inaccurate job of inside measurements since there's always a narrow flat ground on each jaw. The smaller the hole then the less accurate your measurements will be. Calipers would be the most used tool in my shop so I very much agree with you. Buy good ones that can be trusted. But to be honest if I need better than .005" accuracy then it's time to dig out the more accurate equipment.
Good points. Thanks for the insights!
I thought that I knew how to use a micrometer and caliper, but I picked up some very useful info in your video. Thank you!
This video was very fascinating and informative. Thanks for posting.
Great vid! Appreciate the info. What do you do for a living?
Don't store your micrometer with the jaws fully closed. Slight changes in temperature will cause stress in the mechanism and frame. Instead, store the micrometer slightly open. When you buy a new quality micrometer, you will see that it ships in the slighly open position.
Good point. Never thought.
Anthony Yan glad to help :)
Hello GadgetClass.
Got my igaging digital cailper today and it's my first cailper.
Purchased it on your recommendation.
I'm trying to determine if everything is working right.
There is a lot of 'play' or 'wobble' with the thumb wheel.
Up and down of course as I would expect but in general 'sideways' and all around?
Is that correct?
Also, your readout window seems well lit in the video.
My window is dark. The digits are black but the surrounding portion of the window
is the same as when the cailper is off.
Is this readout window suppose to be 'backlit' when the cailper is turned on?
And, how do you remove the battery correctly?
Seems that it is 'stuffed' into a retaining slot... maybe a toothpick to catch the edge?
It's my 1st cailper and I've never handled one before.
The Thumb wheel is supposed to be loose. It is designed to only engage with pressure. The looseness keeps one from applying too much torque on the measuring body. You will find this on calipers of all brands.
You forgot to mention that both calipers and micrometers have to be stored with the jaws/spindles slightly open. As far as strange readings are concerned, one can remove the battery and then reinstall. Sometimes the full power down resets the electronics and they then resume working properly. If not, then replace.
+Diane Paterson Very good points.
I get why you shouldn't store mics closed, but why would it matter for calipers?
I hope you do realise that the ball attachment for pipe wall thickness is supposed to be placed on the anvil and not the spindle?
Gordon Clarke technically it can be used on either. One can even use 2 anvil adapters depending on the application:
www.amazon.com/dp/B00MX6F1PI/?tag=cr38er-20
What is price
tu chacho que haces ahi
what is the actual numbers mean? like if its showing 0.3 inches, or 1.7 etc
its cool, but you still have to translate that # to the tapemeasure...
No. No fractional system is as accurate as decimal measurements, and I promise you that in any precision manufacturing process products are measured in thousandths and tenths (ten-thousandths). For calibration of true precision, systems based on the wavelength of light is used, and gages such as gage blocks are measured in millionths. Accurately. For example: .0001" inch is just barely larger than 1/1024th. Try reading that on a tape measure ;-)
I meant the basics, not thousands...
Csaba Farkas Decimal inch is basic. How many rifle rounds come in fractional sizes? ;-)
atomkinder67 would be nice if someone would understand my original question. ..but here is the answer : to translate numbers from calipers to tape measure, you have to divide 1 inch by 10. Than u can see what the 2.3, or 8.2...coz we all know 7.5 is =3/4" get it ???
Csaba Farkas Moreover to translate a tape measure number to decimal you simply divide the fraction. Using your .75" = 3/4" example: if you divide 3 by 4 (3/4) you get .75.
If you want to just measure in fractions anyways, iGaging's OriginCal now has Fractions. So the Winner of my Caliper Round-Up Now has Fractional Measurement:
www.amazon.com/dp/B00KDUD67G/?tag=cr38er-20