How to measure zero error in screw gauge?
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Zero error in Screw gauge can be found by the following method :first take the screw gauge andmove it i decreasing order along the index line until it gets tight.At that point if there is any error in the Screw gauge,we can find there because if there is any error the zero on the head (rotating) scale does not coincide with the index line when the head scale edge is sharply at the zero of the pitch scale .If the zero of the head scale is above the index line then the error is negative ,if the zero is below the index line then the error is positive .then by the formulaCorrected Head Scale Reading( CHSR ) = Head Scale Reading ( HSR ) – Zero Error(along with their positiveor negative sign) I hope You understood.........!
Zero error in Screw gauge can be found by the following method :first take the screw gauge andmove it i decreasing order along the index line until it gets tight.At that point if there is any error in the Screw gauge,we can find there because if there is any error the zero on the head (rotating) scale does not coincide with the index line when the head scale edge is sharply at the zero of the pitch scale .If the zero of the head scale is above the index line then the error is negative ,if the zero is below the index line then the error is positive .then by the formulaCorrected Head Scale Reading( CHSR ) = Head Scale Reading ( HSR ) – Zero Error(along with their positiveor negative sign) I hope You understood.........!
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