Mechanical watches at the time of going to depend largely on the accuracy of balance wheel hairspring generated to ensure the stability of the frequency. Table because of machine use by a lot of factors both inside and outside, causing harmonic vibration hairspring balance wheel so that when the errors go watch carefully so that we can only adjust the relative error decreases, and should not be completely ruled out, therefore, watches go when they meet the Table go when target accuracy, which is qualified table.
Why do some automatic watches the hands of Article institutions to retain?
This has two main roles:
1) if the wearer automatically watches the day when a smaller amount of activity, especially President, can quickly make use of the hands of institutions to be on tight clockwork, not to watch because of a result of inadequate power to shut down.
2) When the automatic failure of the impact of institutions on article, you can be on the use of manual so that the continuation of the use of watches.
Watch an occasional shut down are not the fault?
Watch an occasional shut down, but as long as they can go after the return to normal, whether it be temporary. Since there is some accidental factors: such as on Article forget, forgot to call after advancing the needle shank head, or occasionally in the use of the process of making gossamer hanging by vibration, or a stuck parts such as would give rise to a halt, but then and can restore normal. So watches occasionally stop a problem is nothing, as long as the time when you can go back to normal, but if often appears to shut down, you need to inspect the repairs.
When clocks go bad be regarded as ultra-fault?
Regardless of mechanical watches quartz watch or have corresponding quality standards, must have a go when the error. Go when clocks are relatively accurate, absolutely accurate, that is not bad is impossible to watch, but as long as the clocks go in line with quality standards when is qualified clocks. watches the factory calibration are qualified in accordance with the regulations, at the time of sale should be able to check the calibration again, in line with the standards of the sale, such as individual super-bad, and good proof-reading and then adjust the sale. watches from the use and use conditions are different, the individual will be in use after the ultra-bad (that is, speed error exceeds the standard), which is arising from the use of sinking situation, not a failure, that can be adapted to meet the normal. but when the pace of errors such as going too big and they can not adjust to normal standards, the property can be failure to carry out necessary maintenance.
Watch hours of time to talk about the needle, why not point second request?
When the clock was installed in the gun barrel, the minute hand is mounted on a sub-round of tube up through the inter-round contact with each other to maintain a fixed transmission ratio. At the clock so the whole point, the minute hand has to-point demand. The second hand is mounted on a second axle on, which is transmission gear train, there is no direct contact with the minute hand (ie, points for the entire time, the second hand does not necessarily mean scale up at 60). Touch all the time, only around pin DIP, DIP should not second hand. Even for the whole sub-sub from zero seconds to fit, and after moving out will be uncoordinated. In their daily lives, “points” of the units have been enough, the second has no practical significance. So at the assembly, “second” pin can be loaded anywhere.