The error in a watch is made up of many complex factors. Environmental factors can all cause errors in watches, and at different times in the same place, there may also be errors in the watch. In order to help repair personnel correctly diagnose problems, here we introduce some common tools for detecting watch errors: timing testers and dot markers. The trajectory of the dots from the timing tester can be used to analyze the causes of the watch error. The timing tester is the most commonly used tool for detecting watch errors. Electronic watches can be tested with an electronic timing tester.
Below are the test results of the timing tester:
From the dot-marking trajectory in Figures 1-40, it can be seen that:
- Figure 1: Watch is functioning normally.
- Figure 2: Watch is running fast.
- Figure 3: Watch has a slow-running fault.
- Figure 8: Positional error.
- Figure 9: Isochronism error.
- Figure 10: Isochronism error.
- Figure 11: Error caused by inappropriate balance amplitude.
- Figure 12: Intermittent stopping of the balance wheel.
- Figure 13: Escapement pallet failure.
- Figure 14: Improper inclination selection on the timing tester.
- Figure 18: Fork jewel fault.
- Figure 19: Fault in the pallet fork and escape wheel.
- Figure 11: Fault in the escape wheel teeth.
- Figure 21: Fault in the escapement wheel causing small amplitude.
- Figure 23: Degraded lubricant in the watch.
- Figure 24: Brushing against the balance wheel due to hair spring issues.
- Figure 25: Improper oiling of the fork jewels.
- Figure 26: Improper oiling of the anti-shock device.
- Figure 27: Improper oiling of the diamond setting area.
For Figures 1-40-1, if the dots are neatly clustered (the width of the two lines is typically required to be less than 0.02 mm) and basically parallel to the edge of the paper strip, this indicates that the watch movement has no error, i.e., zero daily deviation.
For Figures 1-40-2, if the dots are neatly clustered but the line tilts to the right, this shows that the watch movement is operating normally but the timekeeping is slightly fast. If the watch is too fast, the regulator can be adjusted to resolve the issue.
For Figures 1-40-3, if the dots are neatly clustered but the line tilts to the left, this shows that the watch components are operating normally but the timekeeping is slightly slow. Similarly, if it's too slow, the regulator can be adjusted to resolve the issue.