(1) Blade Installation

The installation of the chisel blade does not require any special procedures. The chisel knife has a straight hook shape, which gives it strong tilling capability. It is ideal for working in poor soil conditions and is effective at breaking up weeds and compacted soil. Typically, the blades are arranged evenly along the blade using screws to secure them in place. On the other hand, the left and right machete blades have a curved head and a longer outer edge, providing strong cutting performance. These are suitable for both wet and dry land cultivation, making them versatile tools. Improper blade installation can negatively affect both the quality of work and the tool’s lifespan. There are generally three common installation methods.

1. Outward: Except for the two end blades, all others face outward. After tilling, a furrow appears in the center, making this method ideal for breaking up hard soil and preparing fields.

2. Inward: All blades are bent towards the center. After use, ridges form in the middle, with ditches between each pass. This method is well-suited for general farming operations.

3. Mixed Installation: The left and right blades are staggered and symmetrically placed on the blade shaft, while the end blades are bent inward. This is the most commonly used method, as it provides a smooth and even surface after plowing.

(2) Adjustment

For rotary cultivators attached to wheeled tractors, the depth of tillage is controlled by the tractor's hydraulic system. When using a full or semi-separate hydraulic system, position adjustment is necessary. With a split-type hydraulic system, the ploughing depth is adjusted using positioning clamps on the cylinder rod, and the joystick should be set to the "floating" position during operation. For walk-behind tractors, the depth is adjusted by changing the height of the tail wheel.

During operation, the frame should remain level and aligned horizontally. The front and rear positions must ensure that the transmission remains balanced. Level adjustments are made using the left and right booms of the suspension arm. When the tractor speed is fixed, a faster rotating cutter shaft results in better soil breakdown, while a slower rotation reduces the ability to crush the soil. If the cutter shaft speed is constant, a faster tractor speed leads to deeper tilling. Generally, the cutter shaft is operated at a slower speed, but fast gears are available when finer soil preparation or double tilling is required. During the first pass, the tractor uses I and II gears, and for the second pass, III gear is recommended.

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