Errors in Screw Gauge
There are many reasons why errors may occur during the screw gauge measurement. Here are some common errors associated with screw gauges:
Zero Error
- Positive Zero Error: Thimble scale zero mark moves ahead of main scale zero mark when anvil and spindles touch leading to positive zero error (+Z).
- Negative Zero Error: Thimble scale zero marking lags behind main scale zero mark whenever contact occurs between the anvil and spindles thus resulting into negative zero error (-Z).
Parallax Error: It happens where the eye does not run parallel with the scale of measurements causing misreading at the eye level. To do this successfully, make sure your eye is upright with scale line – if you want to get clear information.
Frictional Errors: These may result in mistakes, particularly in accurate readings. This error can be minimized with regular cleaning and lubrication.
Wear and Tear: Continuous usage may lead to wear and tear of the screw gauge components, affecting its accuracy over time. Regular maintenance and calibration are necessary to minimize errors due to wear.
Temperature Variation: Changes in temperature can cause the metal components of the screw gauge to expand or contract, leading to inaccuracies in measurements.
Human Errors: Incorrect handling, misalignment of the object being measured, or misinterpretation of readings can result in human-induced errors.
Incorrect Calibration: If the screw gauge is not calibrated correctly or if the least count is not accurately determined, it can lead to measurement errors.
Learn about, Errors in Measurement
Screw Gauge: Definition, Working Principle, Formula
Screw Gauge is an amazing device used for measuring small objects precisely. It is defined as an instrument that is used for measuring very small lengths, i.e. diameter of thin wires, the thickness of small sheets, papers, etc.
In this article, we will learn about Screw Gauge, Its structure, Diagram, Working Principle, errors in screw gauge, its applications, and others in detail.
Table of Content
- What is Screw Gauge?
- Screw Gauge Formula
- Screw Gauge Diagram
- Working Principle
- Errors in Screw Gauge
- Uses of Screw Gauge