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Beloved watch ran chord how to do?

Running string assembly and repair in the watch , the main purpose is to check the reliability of the axle shaft into the eye position and the engagement state of the gear shaft lubricating the eye , the end face of the gear runout , radial clearance axial gear , shaft concentricity round tip wheel drive system sensitivity , etc. These strings can be run through in a short time was observed .
Dial mounting surface of the gear train , including a calendar , week calendar and other additional indicator related gear , their speed slower than running through the same chord can quickly check whether its working condition and reliability. Run strings should be under Clockwork weak moment , and all the plus points of table oil should note completed.


There is a saying : When the end of the string to run the process , and if the escapement wheel or second round have the right amount of swing, it shows good wheel drive system ; Personally, I think there is no second round roundabout , heart structure or to an extension , usually eccentric transmission , and the big barrel of the male form prone to swing movement , it is because of the boxes in the running string round the course , produce an inertia , when the spring net chord , as it goes forward, resulting in spring reverse deformation of the core , this will result in a slight rebound torque.
The most important thing is that just a little to give a little bit of string winding , gear train began to rotate, this action can be maintained for at least the center of the wheel ( two ) can be rotated over a week non-stop run continuously and gently winding strings ; even the normal case the strings run well , it does not represent the movement of the assembly work is completed , this is because when the spring once the full radial clearance all round system are changed , and especially the barrel wheel two , in part , the driving force of the shaft tenon being more close to the greater pressure . Such strings can test run at low energies clockwork mechanism change calendar calendar reliability , to be replaced with real work to go on quite a fee .


Strings also ran two cases : ( 1 ) the state of pure movement , ( 2 ) movement has been put on the needle plate , and fitted into the case. The second state is more important , because a lot of watches are only loaded into the case, cover tightly closed when problems arise , typically because the movement of the holes on the case table head tube handle different heart , as well as machine heart under some pressure , leading plywood oppressed , parts clearance lost.
Running chord with particular attention to see if the gear train cyclical block, change speed , unsteadiness or even slow rotation Caton phenomenon, according to the gear ratio or their respective spin cycle , to determine possible problems the location of this purpose is to do the running string .
Problems can also be fitted on the run string to check, especially the gap between hands , hands and dial breaks or when other identification of gaps , second hand and glass table space and so on. For example, a watch , when the second hand is always running string was found parked on the dial when the character positions 35-45 , slightly curved glass table , watches and relatively thin , indicating that the second hand rubs up against the inside of the tip has glass table , and severe shock and vibration causes the second hand deformation, especially the kind of thin and long seconds .
Hands are mounted on the respective pin axis , vertical loading pin wheel , radial clearance can be accessed through the obvious tip height is reflected , the more so the greater the length of the pointer , it was like amplifiers , old watches and corresponding drill axle conspicuous place , there will be wear and tear, especially in the center of the wheel 's eye position, its performance is all the difference in the dial pointer has 3-6-9-12 from several locations on the dial height , slim watch the second hand on the edge of the glass case will appear . Zhiwei and renowned , is the truth.