What is zero error in screw gauge?

The concept of zero error occurs when the instrument gives inaccurate readings when there is no object placed between the anvil and spindle (when the screw is closed).

Types of zero error

• Positive Zero error
• Negative zero error

Zero Error Correction Formula

“HOW TO DECREASE ERRORS IN SCREW GAUGE”?

• • Select a screw gauge that is in good condition.

• • Make sure that the screw gauge is clean and free of dirt.

• • While taking the measurement, hold the screw gauge firmly and steadily.

• • Avoid using too much force while rotating the screw.

• • For correct measurement, take multiple readings and take average out of it.