Universal tool microscope how to measure ring gauge inner diameter size
Universal tool microscope how to measure the size of the inner diameter of the ring gauge: the contact method of measurement, the general use of a few millimetres in diameter of the probe, and the ring gauge is measured on the inner wall of the contact, due to the small diameter of the probe, to ensure that the probe and the measured ring gauge for the point of contact. Measurement, when the probe in the direction of the diameter of the ring gauge is measured at A, B, take two readings of the instrument a and b, then the size of the ring gauge is measured: D = (b - a) + d, where: D - the ring gauge is measured; b, a - the instrument's two readings; d - the diameter of the instrument probe. Sensitive lever must be used in conjunction with the 3 × objective lens, the choice of other objective lenses will not be able to see the three pairs of double-quadrature image. Measurement before the main microscope in the universal tool microscope installed on the 3 × objective lens, optical sensitive lever with a catch on the lower end of the 3 × objective lens, the optical sensitive lever up to push the foot, with a rotary knob can be fixed. Fix the ring gauge to be measured in the middle position of the working table without any movement, so as not to cause measurement error. Lower the arm, the optical sensitive lever probe into the measured hole, and then adjust the instrument longitudinal and transverse sliding plate, so that the probe and the measured ring gauge hole wall contact, and is located in the direction of the diameter of the hole, which is marked by the adjustment of the transverse sliding plate, so that the longitudinal value to reach the turn (great value or very small). Keep the transverse value unchanged, move the longitudinal slide, so that the eyepiece in the three pairs of double-scored line symmetrical set of the real line of the metre line, and read the longitudinal value of the first time a1 and then rotate the force steering ring, change the direction of the force, move the slide, in the other side of the ring gauge under test, so that the probe in the direction of the measured aperture and the wall of the hole in contact with the probe and adjust the probe is in a vertical position, read the longitudinal value of the second time b1, by the principle of the contact method of measurement of the aperture diameter D = (b - a) + d, calculate the measurement results, optical sensitive lever probe diameter d engraved on the side of the lever. For example: measuring φ20mm ring gauge, known optical sensitive lever probe diameter d for 310749mm, the first reading value of 8116569mm, the second reading value of 9815862mm, the measured ring gauge inside diameter ruler D is: D = (9815862-8116569) + 310749 = 2010042 (mm).
