Question

In \(\underline{\hspace{2cm}}\), the yarn passes through two plates in which one plate is the baseplate and the other is a weighing plate.

• A. Electronic tensioner
• B. Additive type tensioner
• C. Multiplicative type tensioner
• D. Roller tensioner

Hint:

Tensioners are classified by how they apply force. "Multiplicative" tensioners use friction by pinching the yarn (e.g., discs). "Additive" tensioners add tension by using weights or springs to deflect the yarn path.

Answer 1

The Correct Option is C

Step 1: Understand the mechanism described. The setup involves two plates: a fixed baseplate and a movable "weighing" plate. The yarn runs between them. The weighing plate applies pressure to the yarn, creating tension.

Step 2: Analyze the types of tensioners.
- Multiplicative type tensioner (disc tensioner): This type works by pressing the yarn between two surfaces (discs or plates). The tension is controlled by the pressure applied. The description of a baseplate and a weighing plate fits this category. The tension applied is a function of the incoming tension multiplied by a factor related to the friction and wrap angle.
- Additive type tensioner: This type adds tension by deflecting the yarn path using weighted pulleys or arms.
- Electronic tensioner: This is a broad category that can use various mechanical means but is controlled electronically to maintain constant tension.
- Roller tensioner: This type uses rollers to control tension, often by creating a specific yarn path or using braking systems on the rollers. The plate system described is the classic design of a multiplicative or disc-type tensioner.