Question

What is positive error of micrometer screw gauge? Explain it with neat sketch.

Answer 1

Answer:

Error When the plane surface of the screw and the opposite plane stud on the frame are brought into contact, if the zero of the head scale lies below the pitch scale axis, the zero error is positive. For example the 5th division of the head scale coincides with the pitch scale axis, then the zero error is positive.

Explanation:

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Answer 2

Positive zero error in screw gauge

Zero Error of a Screw Gauge:

When the plane surface of the screw and the opposite plane stud on the frame are brought into contact, if the zero of the head scale coincides with the pitch scale axis, there is no zero error.

Positive Zero:

Error When the plane surface of the screw and the opposite plane stud on the frame are brought into contact, if the zero of the head scale lies below the pitch scale axis, the zero error is positive.For example the 5th division of the head scale coincides with the pitch scale axis, then the zero error is positive.

Z.E=+(n×L.C),=+(5×L.C),

and the Zero Correction Z.C=(5×L.C)