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time division pin coordination

The reason for the difference between the

time division is as follows:

1,, the surface of the plate with the installation of the poor (usually mosaic or printed)

2, the scale of the dial to have a printing error

< p > 3, dial the center hole and the movement, and the second hand shaft hole do not coincide, pan claw and movement between also exist radial clearance),,

,, 4 minute when the assembly installation error of

watch minute poor coordination of

< p > on watch, poor coordination, in the industry standard "mechanical watches, QB/T1249-2004 is such a requirement: when the needle with the character center superposition, minute deviation" 12 "when character center angle should be in conformity with the provisions of this. 1, excellent products of —18~18 (angle); 2, grade —24~24 (angle); 3, qualified —30~30 degrees (angle). Check up, every 6 degrees for a lattice, that is to say, up to the minute hand of poor coordination of not more than 5 lattice. When the minute installation error is generated when the minute hand assembly, poor coordination of the main reason. , coordinated the examination method in the industry standard is such a requirement: "clockwise respectively with" 3 "and" 6 "and" 9 "," 12 "character coincident with the center and check the minute hand of the deviation angle of" 12 "conform to the center of the", should be in accordance with the above requirements, this check is watches use reliability.

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