These slides will make you to design a Vernier Calipers in a very simple way. Also make us to understand the basic concept of how to measure smaller units which is not on a regular scale.

1. ACTIVITY : DESIGN OF VERNIER CALLIPERS
MATERIALS REQUIRED
• A4 SIZE CARD SHEETS – 2 NOS
• 12’ SCALE
• SHARP PENCIL
• ERASER
• PROTRACTOR
• SCISSORS

2. CONSTRUCTION
1. KEEP THE PAPER IN LANDSCAPE POSITION & DRAW
HORIZONTAL LINE OF 10’ WITH MARKINGS AT EVERY INCH &
NUMBER EACH POINT STARTING WITH 0
0 1 2 3 4 5 6 7 8 9 10

3. CONSTRUCTION
1. NOW DRAW A PERPENDICULAR LINE AT POINT 0 USING
PROTRACTOR FOR LENGTH 5 INCHES & MARK EVERY 0.5 INCH
STARTING WITH 1

4. 0 1 2 3 4 5 6 7 8 9 10
1
2
3
4
5
6
7
8
9
10

5. CONSTRUCTION
1. DRAW HORIZONTAL LINES PARALLEL TO X-AXIS AT ALL POINTS
ON Y-AXIS
2. JOIN POINT 10 ON Y-AXIS TO POINT 9 ON X-AXIS

6. 0 1 2 3 4 5 6 7 8 9 10
1
2
3
4
5
6
7
8
9
10

7. CONSTRUCTION
PROJECT THE INTERSECTING POINTS ON THE HYPOTENUSE ONTO
X-AXIS PARELLEL TO Y-AXIS

8. 0 1 2 3 4 5 6 7 8 9 10
1
2
3
4
5
6
7
8
9
10
These are
the
divisions
on the
Vernier
Scale

9. 0 1 2 3 4 5 6 7 8 9 10
1
2
3
4
5
6
7
8
9
10
These are
the
divisions
on the
Vernier
Scale
Erase the previous construction lines
Now the two scales (Main & Vernier) are ready

10. 0 1 2 3 4 5 6 7 8 9 10
0 1 2 3 4 5 6 7 8 9 10
MAIN SCALE
VERNIER SCALE

11. CALCULATIONS
1 Main Scale Division = 1 Inch
Number of Vernier Scale Divisions = N = 10
10 Vernier Scale Divisions = 9 Main Scale Divisions
1 Vernier Scale Division = 0.9 Main Scale Division
Vernier Constant = 1 MSD – 1 VSD
= 1 – 0.9 MSD
= 0.1 MSD
= 0.1 Inch
VERNIER CONSTANT (VC) = 0.1 Inch

12. APPLICATIONS
• Used for measurement of length which is not on scale
• Very small length measurements

13. Task : Measure the length of a pencil
0 1 2 3 4 5 6 7 8 9
MAIN SCALE
5 Full Divisions = 5.0 Inch

14. Task : Measure the length of a pencil
0 1 2 3 4 5 6 7 8 9
MAIN SCALE
5 Full Divisions = 5.0 Inch
0 1 2 3 4 5 6 7 8 9 10
5th
Division is matching
Thus it is 5
Total Length = Full MSD + VC X No. of Divisions
= 5.0 + (5 X 0.1)
= 5.5 Inches

15. 0 1 2 3 4 5 6 7 8 9 10
0 1 2 3 4 5 6 7 8 9 10
MAIN SCALE
VERNIER SCALE
Designed by
S. B. Hosalli Patil
HOD/EC
B.L.D.E.A’S Polytechnic, Vijayapur

16. THANK YOU FOR WATCHING