Drafting Wave

The irregular motion of short fibers, wave like formation in the sliver between pairs of roller is called Drafting Wave. The main causes of Drafting Wave are:
1. Short fiber.

2. Nip to nip distance is greater then fiber length.

3. In carded yarn fiber are not parallel.

4. Wider roller setting.

5. High percentage of short fiber.
Distance between two rollers that is Roller setting:

Drafting wave distance