The Vernier Caliper

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# The Vernier Caliper - PowerPoint PPT Presentation

The Vernier Caliper. Reading the caliper and parts of the caliper. Parts of the Caliper. The Vernier Caliper . The vernier caliper has two main parts which has the scales that the measurements are read from.

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Presentation Transcript

### The Vernier Caliper

Reading the caliper and parts of the caliper

The Vernier Caliper
• The vernier caliper has two main parts which has the scales that the measurements are read from.
• The main beam:this is the non moving part of the unit and contains the main scales, and sub scales
• This then is called the main scale, as the main numbers are read here first.
The main scale
• The main scale runs the entire length of the vernier caliper
• The scale is similar to the micrometer
• There are usually two scales on the main beam. The imperial,and metric scales
• The imperial scale runs from 0-6 inches or may be longer the scale is divided into 1 inch segments
• The main beam allows for three numbers to be read(1) the whole number full inches( 2) major divisions e.g. 0.400 and ( 3) minor divisions e.g. 0.025 or .050 these are all read on the main beam scale
The main Beam
• The imperial scale has 1 inch divisions which is divided into 1/10 th or 0.100 inches
• This scale is also subdivided into four other segments(¼) or 0.025 inches
• This main beam scale is then accurate to 0.025 inches.
• On the metric scale the segments are arranged into segments of 1cm or 10 mm
The main beam (metric)
• The main beam segments 1cm is broken down by dividing 1 by 10 =1mm or 0.1 cm
• This scale will run up to 150 mm or 15cm or longer
• The measurements read here are called the base measurements and is accurate to 1mm, 0.1 cm .They are as follows,1mm or 0.1 cm unlike the imperial scale accuracy is at 1 decimal place.
The vernier Scale
• The vernier scale is the moving scale that slides back and forth along the beam
• This moving or sliding scale is a subdivision of the smallest scale on the main beam scale which is either 0.025 inches or 0.1 cm or 1mm.
• This scale contains the focal point (0) which is where the readings are taken from.
• This scale now is broken down into segments by dividing 0.025 inches by 25
• 0.025/25=0.001inches
• The metric scale of 1mm or 0.1cm is broken down by 10 and is usually accurate to 0.02mm or 0.05mm
• 1mm/10=.1mm or 0.01cm
The vernier scale
• This scale on the scale on the metric vernier is accurate to 0.02mm or 0.05 based on the number of segments
• The total length of the vernier scale represents 1mm on the on the main beam scale
• On the imperial vernier the scale is broken down to read accurate to 0.001 inches and therefore the total length of the vernier represents 1 segment of the main beam scale this may be a 0-25 or 0-50 scale.