How does a vernier scale work?
The vernier scale works on the principle of using the alignment of line segments displaced by a small amount to make fine measurements. The human eye can easily detect this alignment of lines which is the main fact that drives a vernier. A vernier scale has a main scale and a vernier scale.
Why is the vernier scale used?
A vernier scale, named after Pierre Vernier, is a visual aid to take an accurate measurement reading between two graduation markings on a linear scale by using mechanical interpolation, thereby increasing resolution and reducing measurement uncertainty by using vernier acuity to reduce human estimation error.
How are vernier calipers manufactured?
A typical vernier caliper consists of a stationary bar and a movable vernier slide assembly. The stationary rule is a graduated bar with a fixed measuring jaw. The vernier slide assembly combines a movable jaw, vernier plate, clamp screws, and adjusting nut.
What is vernier scale in engineering drawing?
Vernier Scales. • Similar to Diagonal scale, Vernier scale is used for measuring up. to second decimal. • A Vernier scale consists of (i) a primary scale and (ii) a vernier.
What are the different types of scales in engineering drawing?
The scales in engineering drawing are classified as the following:
- Plain scale.
- Diagonal scale.
- Vernier scale.
- Comparative scale.
- Scale off chords.
What is main scale and vernier scale?
A Vernier scale is used to take an accurate measurement for a reading between two markings on a linear scale which is done by using the mechanical interpolation; thereby increasing resolution and reducing measurement error whereas the scale on the larger, fixed portion of the caliper which gives the most significant …
What is the difference between main scale and vernier scale?
The 10 divisions on the vernier scale are equal to 9 divisions on the main scale. The difference between one main scale division and one vernier scale division is called the least count.
What are the two parts of vernier scale?
Parts of a vernier caliper:
- Outside jaws: used to measure external diameter or width of an object (Blue)
- Inside jaws: used to measure internal diameter of an object.
- Depth probe: used to measure depths of an object or a hole ( not shown in this model)
- Main scale: gives measurements in mm.
How many scales are there in vernier calliper?
two
It utilizes two graduated scales: a main scale similar to that on a ruler and an especially graduated auxiliary scale, the vernier, that slides parallel to the main scale and enables readings to be made to a fraction of a division on the main scale.
What is the purpose of a vernier scale?
A vernier scale is a series of measuring lines added to micrometers, calipers and weighing devices to improve measurement accuracy.
The vernier scale works on the principle of using alignment of line segments displaced by a small amount to make fine measurements. Human eye can easily detect this alignment of lines which is the main fact that drives a vernier.
How can a vernier scale provide higher accuracy?
Vernier scale is the secondary scale that is set parallelly next to the main scale to provide higher accuracy . The way it acts is by dividing each division on the main scale into some more smaller divisions. It is used in both calipers and micrometers.
How many divisions are there on vernier scale?
In the , the vernier scale has 25 divisions, whereas the main scale has 24 divisions in the same length. This means that the divisions on the vernier scale are shorter than those on the main scale by 1/25 of a division on the main scale.