1. Rigidity adjustment method: It is an adjustment method that adjusts the tooth side clearance of the straightener and cannot compensate automatically. Therefore, the spacing and thickness of the gears must be strictly controlled, otherwise the flexibility of the transmission will be affected. The structure of this adjustment method is relatively simple, and has better transmission rigidity.
2. Flexible adjustment method: After this method is adjusted, the backlash can still be automatically compensated. Generally, the pressure of the pressure spring is adjusted to eliminate the backlash of the tooth, and the gap between the tooth thickness of the gear and the circumferential joint can also be maintained without gap. However, this structure is relatively complicated, with large axial dimensions and low transmission rigidity.