Some common uses of miniature springs in a cotton picker may include:

1. Tensioning: Miniature springs can be used to provide tension or force in certain parts of the machine, helping to keep components in place and functioning properly.

2. Shock absorption: Miniature springs can help absorb shock and vibration that occurs during the operation of the cotton, reducing wear and tear on components and improving overall performance.

3. Alignment: Miniature springs can assist in maintaining alignment of moving parts, ensuring smooth operation and preventing potential damage or misalignment.

4. Cushioning: Miniature springs can act as cushioning elements, helping to reduce noise, friction, and impact between different parts of the machine.