Introduction to common sense of daily maintenance of rotating shaft
Criteria for inspection and proofreading sequence: the previous inspection items are not affected by the latter.
Criteria for inspection and proofreading sequence: the previous inspection items are not affected by the latter. Inspection method: the level axis of the circular level shall be inspected and checked equally with the rotating axis of the instrument: first, center the circular level bubble with the foot screw, and then rotate the instrument 180 degrees. If the bubble is still centered, this condition is satisfied. If the bubble deviates, the condition is not satisfactory.
Proofreading: proofreading is carried out with the proofing screw installed under the circular level bubble. It generally has only three. During the operation, according to the method of leveling circle level, respectively adjust three check screws to center the bubble and move half of the deviation from the length to the center position. In case of operation, after calibration, the horizontal axis is parallel to the rotating axis of the instrument. If the instrument is leveled at this time, the rotation axis of the instrument is in a straight state. But in practice, we need to make repeated adjustments before the end.
Check and proofread the crosshair perpendicular to the rotation axis of the instrument: first aim one end of the crosshair at a point, and then slowly rotate the telescope with a micro screw to investigate the movement track of this point in the field of view. If this point can always move on the crosshair, it means that the crosshair of the crosshair is perpendicular to the rotation axis of the instrument. If this point leaves the crosshair, it means that the crosshair is not perpendicular to the rotation of the instrument, so it needs to be calibrated.
Proofreading: use the proofing screw to fix the cross wire ring. First loosen the proofing screw to make all the cross wire rings rotate. Make the horizontal wire coincide with or parallel to the horizontal line. Check again after proofreading until the requirements are satisfied.
Inspection and proofreading of the telescope sight axis and the horizontal tube horizontal axis should be parallel note: the telescope sight axis and the horizontal tube horizontal axis are space straight lines. If they are parallel to each other, whether the projection on the rigid plane or the projection on the horizontal plane should be parallel. The inspection of whether the projection on the rigid plane is parallel is called i-angle inspection. The inspection of whether the projection on the horizontal plane is parallel is intersection Cross error check.
Inspection method of angle I: select two points A.B with proper interval in a relatively flat place, and nail them into the ground with wooden piles, or replace them with ruler pads. Set the level between the two points of A.B so that the interval between the two ends is strictly equal. At this time, the correct height difference HAB is measured, and then place the level near any point of the two points (such as point B). At this time, due to the unequal interval, the measured height difference HAB 'will have the influence of angle I.