Author Topic: Vernier  (Read 728167 times)

Fu-Kwun Hwang

  • Administrator
  • Hero Member
  • *****
  • Posts: 3062
    • Enjoy the fun of physics with simulations
Re: Vernier
« Reply #30 on: October 12, 2007, 10:00:47 pm »
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

  • Newbie
  • *
  • Posts: 7
Re: Vernier
« Reply #31 on: October 17, 2007, 03:29:55 am »
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

  • Administrator
  • Hero Member
  • *****
  • Posts: 3062
    • Enjoy the fun of physics with simulations
Re: Vernier
« Reply #32 on: October 17, 2007, 09:33:07 am »
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

  • Newbie
  • *
  • Posts: 7
Re: Vernier
« Reply #33 on: October 18, 2007, 07:36:48 am »
 ;Dthanks alot for ur reply but what about vernier calipar scale value ::)
« Last Edit: October 18, 2007, 07:38:53 am by yasmine »

Fu-Kwun Hwang

  • Administrator
  • Hero Member
  • *****
  • Posts: 3062
    • Enjoy the fun of physics with simulations
Re: Vernier
« Reply #34 on: October 18, 2007, 05:30:31 pm »
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

  • Newbie
  • *
  • Posts: 7
Re: Vernier
« Reply #35 on: October 18, 2007, 11:05:48 pm »
thank u for ur great Information and ur helps ,so if u know good site for measurment I should be grateful :D

yasmine

  • Newbie
  • *
  • Posts: 7
Re: Vernier
« Reply #36 on: October 28, 2007, 10:26:26 pm »
 ??? ::)

may

  • Newbie
  • *
  • Posts: 1
Re: Vernier
« Reply #37 on: September 02, 2008, 03:40:03 pm »
 thank you for your simulation ;D

lookang

  • Hero Member
  • *****
  • Posts: 1772
  • http://weelookang.blogspot.com
    • lookang web
Re: Vernier
« Reply #38 on: September 03, 2008, 11:21:07 am »
thank u for ur great Information and ur helps ,so if u know good site for measurment I should be grateful :D

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 ! :(

« Last Edit: September 03, 2008, 11:24:28 am by lookang »

erc8888

  • Newbie
  • *
  • Posts: 1
Re: Vernier
« Reply #39 on: October 10, 2008, 03:01:23 am »
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

  • Hero Member
  • *****
  • Posts: 1772
  • http://weelookang.blogspot.com
    • lookang web
Re: Vernier
« Reply #40 on: October 10, 2008, 05:55:02 am »
« Last Edit: October 10, 2008, 05:58:09 am by lookang »

mnarat

  • Newbie
  • *
  • Posts: 2
Re: Vernier
« Reply #41 on: December 26, 2008, 07:45:55 pm »
Thank u very very much ,your projects help me very much in learning and teaching

jorepereira

  • Newbie
  • *
  • Posts: 1
Re: Vernier
« Reply #42 on: January 21, 2009, 11:33:14 pm »
Excellent website for learning how to measure with vernier. It is very helpful for all. Thanks and congratulations!  ;D
-*-

lookang

  • Hero Member
  • *****
  • Posts: 1772
  • http://weelookang.blogspot.com
    • lookang web
Re: Vernier
« Reply #43 on: February 04, 2009, 11:35:32 pm »
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

  • Hero Member
  • *****
  • Posts: 1772
  • http://weelookang.blogspot.com
    • lookang web
Re: Vernier
« Reply #44 on: May 07, 2009, 10:49:24 pm »
« Last Edit: May 07, 2009, 10:56:56 pm by lookang »