Question

The speed of rotor in the open end spinning system influences the __________ in the yarn.

• A. fibre breakage
• B. hooks removal
• C. fibre configuration and twist level
• D. fibre wrapping

Hint:

In Rotor spinning, the rotor acts as both the "twister" and the "assembler." Higher speeds mean more centrifugal force and more twist.

Answer 1

The Correct Option is C

Concept: Rotor spinning (Open-End) is a high-speed process where fibers are separated and then reconstituted in a rapidly rotating rotor.

Step 1: The Role of Rotor Speed.
The rotor speed is the most critical parameter in this system. It directly determines the mechanical twist inserted into the yarn (Twist = Rotor Speed Take-up Speed). Therefore, any change in speed directly alters the twist level.

Step 2: Centrifugal Force and Configuration.
As the rotor spins, centrifugal force presses the fibers into the "rotor groove." The magnitude of this force depends on the rotor speed. This force dictates the fibre configuration—how tightly they are packed and how they are aligned before being "peeled" into the yarn structure.