Causes.
1. The coating roller and bearing precision is not enough to form a regular crossbar path;

2. When the coating roller is the active drive, the choice of speed control programme is not appropriate, such as with harmonic reducer direct connection;

3. Tension control system is unstable, or tension isolation is not well set, due to sudden changes in tension caused by the actual speed instantaneous changes; other operations caused by vibration transfer to the coating head;

4. The comma knife clamping mechanism is not stable enough, and there are changes in the operation;

5. The whole machine running speed is not stable, sudden increase or decrease;

6. Unstable liquid level in the storage tank is high or low.

Solution:
1. Check and repair and replace the first off parts excluded;

2. If the coating roller is the main drive point, choose a good adjustment programme, such as using servo motors;

3. In the tension isolation on the hand, on the one hand, so that the tension is stable, on the other hand, so that the operation of vibration will not be transmitted to the coating head to go;

4. Check and improve the clamping mechanism;

5. Stabilise the speed;

6. Keep the liquid level constant.


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