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Virtual Vernier Scale in Milesimal inch 25 Divisions – Use

Virtual Vernier Scale in inch milesimal 25 divisions - using

Using the vernier caliper in inch milesimal vernier scale with 25 divisions

Vernier is a technological device that increases the sensitivity of the measurement instrument, when it subdivides the smaller division of it. On this simulator, the vernier (rectangle below the scale) has twenty and five spaces between the vertical lines. This means that it divides by 25 the dimension 0.025in (twenty and five micro inch) that is the smaller division of the scale.

Simulator of reading and interpretation vernier scale in millimeter, decimal resolution

Vernier scale

On this simulator, the vernier is the below scale, that slides under the main scale (fixed) that measures the greatness ‘inch’ in your decimal form (this means that the inch (1in) is divided in ten divisions (the spaces between the long marks – 0.1in) that are subdivided by four (the spaces between the short marks), making 40 divisions or 0.025in) -figure 1.

inch divided by ten (decimal or 0.1 in) and subdivided by four (0.025 in)

figure 1 – inch divided by ten (decimal or 0.1 in) and subdivided by four (0.025 in)

The vernier has twenty-five divisions, so it divides the smallest division of the main scale by twenty-five (0.025in / 25 = 0.001in) [ | i i i | i i i | i i i | i i i | i i i | ] – figure 2.

vernier - to divide by twenty and five the smaller division of the main scale

figure 2 – vernier – to divide by twenty and five the smaller division of the main scale

If the zero mark of vernier aligns with one of the bigger marks of the main scale will give the tenths of the measure, direct reading! If it aligns with the first short mark, sum 0.025in the the decimal measure; (0.050 if aligns with the second and 0.075 if aligns with the third -multiply the number of marks by 0.025in) sum this result (milesimal part) with the integer part and with the decimal part.

The reading is very simple -figure 3. Observe if the zero (0) of vernier coincides with one of the marks of the main scale the reading is direct.

scale in thousandth inch with the smaller division subdivided by one vernier and vernier

figure 3 – scale in thousandth inch with the smaller division subdivided by one vernier and vernier

If the zero of the vernier will be between two marks of the main scale, verify if the left mark is one subdivision (small mark – 0.025in) and multiply 0.025in by the number of small marks to the left, sum this number to the whole part, the tenths of inch and the value of the mark of the vernier that aligns (finally). In the example of -figure 3

  • the measure that we are measuring is bigger than 7in and smaller than 8in
    • we measured 7 in to start the sum
  • the zero of the vernier swept by the third mark of the main scale
    • 0.3 in
  • the zero of the vernier also swept the first small mark of the main scale
    • 1 x 0.025 in = 0.025 in
  • the sixth mark of the vernier aligned with the main scale
    • 0.006 in
  • add the values
    • 7 in + 0.3 in + 0.025 in + 0.006 in = 7.331 in

Simulator of use, reading and interpretation of vernier scale in thousandth inch 0.001in

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Eduardo Stefanelli

Engenheiro por profissão, professor por vocação

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