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rudder angle indicator adjustment
For many years, the rudder angle indicator, main engine tachometer and other indicating instruments in marine display instruments mainly adopt magnetoelectric moving coil instrument and self-adjusting angle machine instrument. The moving coil meter itself can only measure DC, but it can also measure AC with peripheral circuits. The self-adjusting angle instrument is generally large in volume and large in power consumption, so it needs to be used in pairs . From the perspective of display, the angle of synchro instrument is relatively large, generally more than 300 degrees, while the actual angle of moving coil instrument is generally small, generally about 90-240 degrees .
From the perspective of linearity, due to the quality of hairspring and magnetic steel of moving coil instrument, the influence on linearity can not be ignored, and it is often necessary to use the density of scale line for correction.In terms of service life, the main accuracy of moving coil instrument is poor seismic performance, which is determined by the characteristics of hairspring structure. Synchro instruments must be used in pairs, that is, the transmitter must also be synchro. Although in recent years, there are also synchro signal conversion of electronic modules, it is generally rarely used because of its high price. The power consumption of the synchro is large. In the long run, the indication will be inaccurate or impossible due to the aging of the coil, the grinding of the bearing, the cleaning of the bore between the rotor and the stator, etc ;
For example, the installation of the moving needle and the use of the balance ring of the meter are very complex, because the installation of the moving needle and the use of the balance ring of the meter are also very sensitive, and the use of the balance ring of the meter is also very complex.
1. Due to the use of stepping motor, there's no hairspring, so the service life in vibration is veritably long;
2. Due to the use of stepping motor, the total gyration angle can reach 315 degrees;
3. Due to the use of stepping motor, linearity can be done;
4. Due to the use of stepping motor, the necklace is large, and the periphery of the cadence can be large;
5. Due to the use of stepping motor, the delicacy of the cadence won't be affected whether it's installed horizontally or vertically.
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