Question

In the warp knitting machine, \(\underline{\hspace{2cm}}\) of the guide bar takes place either from the front of the needles to the back or from the back of the needles to the front.

• A. Swinging motion
• B. Shogging motion
• C. Vertical motion
• D. Circular motion

Hint:

The two fundamental guide bar motions in warp knitting are: - Swing: In-and-out, through the needles (front-to-back). - Shog: Sideways, along the needles (left-to-right).

Answer 1

The Correct Option is A

Step 1: Understand the basic movements in warp knitting. To form a loop, the yarn guide (held in a guide bar) must move the yarn around the needle. This involves several distinct motions.

Step 2: Define the motions of the guide bar.
- Swinging motion: This is the movement of the guide bar through the space between the needles, from the front of the machine to the back, and vice-versa. This action places the yarn in the hook of the needle.
- Shogging motion: This is the sideways (lateral) movement of the guide bar, parallel to the needle bar. This motion laps the yarn around the needle to form the loop and also determines the pattern by moving the yarn to different needles.
- Vertical motion: The needles themselves move vertically up and down.
- Circular motion: This is not a standard term for a primary guide bar movement. The combination of swing and shog results in the yarn guide following a complex path, but the individual component motions are swing and shog.

Step 3: Match the description to the motion. The description "from the front of the needles to the back or from the back of the needles to the front" precisely defines the swinging motion.