Vernier

[Fu-Kwun Hwang]

The scale on Vernier calipers (or micrometer) was designed in a way that it is easy to read the value.
This applet was design to help you read the value. I am sorry that you did not understand it.

Use the following snap shot image of the applet as an example.

1. You will find 0. pass the 9.0 mm line so the distance is more than 9.0 mm
2. Find the line which is aligned for both rulers. Read the number from the moving ruler, which correspond to .7 mm
3. Add those two together, so you have 9.7 mm.

Is it simple enough. It is similar for the micro-meter. Use the above image as an example:
You will find the distance is more than 5.5 mm and you will find .28mm from the rotating part.
So the final result is 5.5mm+0.28mm=5.78mm

[yasmine]

th for ur great efectors but i know how read the value from vernier calipar  or micrometer but i do't know there scale value
for ur ex in micrometer it have scale value .01from mm those my qustion
how i know .01(scale value)

[Fu-Kwun Hwang]

When the rotating part rotate one complete cycle, it move 0.5 mm distance (the main scale increase by 0.5mm).
And there are 50 divisions for one complete cycle. So the smaller scale (one division) is 0.5/50=0.01 mm

[yasmine]

 ;Dthanks alot for ur reply but what about vernier calipar scale value

[Fu-Kwun Hwang]

Registed user can get files related to this applet for offline access.
Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list
If java program did not show up, please download and install latest Java RUN TIME

The total length for the scale of the moving part is 19mm.
And it was divided by 10 divisions, so each division is 1.9mm which is less than two units in the main scale by 2.0-1.9mm=0.1mm.

Think of the above system in the following way:
Assume every 2.0 mm in the main part is replaced by a 2.0mm block.
And every 1 division in the moving part is replace by a 1.9mm block.
If the first block of both part are aligned at the right, then there is a 0.1 mm displacement at the left.
If the second block of both part are aligned at the right, then there is a 0.2mm displacement at the left.
...
I hope you can understand what I mean.
Anyway, I am going to create another java applet to show it.

Drag the slider to change the alignment points. Assume the top block is 2.0mm each, and the lower one is 1.9mm each (total length =1.9mm*10=19mm)

Registed user can get files related to this applet for offline access.
Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list
If java program did not show up, please download and install latest Java RUN TIME

[yasmine]

thank u for ur great Information and ur helps ,so if u know good site for measurment I should be grateful

[yasmine]

 

[may]

 thank you for your simulation

[lookang]

thank u for ur great Information and ur helps ,so if u know good site for measurment I should be grateful

measurements?

well, i have been posting in my own forum, all the good resources i come across
key in a search "measurements"

http://66.7.205.91/~lookangc/index.php?topic=29.msg1466#msg1466

you can find vectors, Vectors Addition, many interactive learning tools i found all over the net.

need to register to view !

[erc8888]

Thx for the great program.  I'm in my first semester taking electromechanical classes at a tech school and we have had limited time in lab to get familiar with calipers and vernier scales.  This program really helped reinforce what I learned in lab and it really showed come test time.  thx again

[lookang]

there is a similar one made in EJS over http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=684.msg2452#msg2452. Made/customised with many thanks to Prof Hwang


enjoy

http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=684.msg2452#msg2452

[mnarat]

Thank u very very much ,your projects help me very much in learning and teaching

[jorepereira]

Excellent website for learning how to measure with vernier. It is very helpful for all. Thanks and congratulations! 
-*-

[lookang]

http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=684.msg3445#new
Vernier calipers applet with many options for smallest division


normally there is an mark for the smallest scale, like in this applet

can you see?

[lookang]

maybe this one is clearer?
http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=684.0

[lookang]

this is a Ejs version of the vernier caliper
http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=684.0

it is by Fu-Kwun Hwang and lookang

[johnytin]

I am wondering if anyone has had any experience using Vernier's LabPro data collection device with Linux.

While I am familiar with their Linux page, I do not understand most of it. I am experienced with using the LabPro on Windows and Mac, but I would really like to know if anyone has successfully used it with Linux in a classroom environment.

[PriteHome]

I have found that your program are very useful I have to say Thank you for your efforts.

[Fu-Kwun Hwang]

Ｉam glad to hear that you find it useful! 
Suggestion to improve the applet will be highly appreciated!

[dennisseda]

Dr Hwang,

I'm very thankful you have made all these simulations. As a secondary school physics teacher, i find the apps very useful for both demos and exam setting.

On another thing, the Creative Commons license basically says I can share these apps, as long as you are acknowledged. I would like to post your apps into my website, as to help make it more interactive for the students I teach. Your approval would be very much appreciated.

Thank you very much!

[Fu-Kwun Hwang]

You are welcomed to distribute simulations I have created. You can even modify the simulation if EJS has been installed in your computer.
Enjoy the fun of physics!

[saad313]

Thanks alot it was a real help , as a student of industrial manufacturing engineering with the subject of dimentional metrology it is really important to be clear in the concept so beautifully explained here. thanks again !!!!!!

[marcasitejewelry]

Thank you
it helped me so so much in my coursework, thank you so much

[koclup1580]

thank you.