# Study of sley movement, construction and calculation of sley eccentricity

Introduction:

The sley is a component of a weaving machine that is responsible for beating the weft yarn into place after it is inserted across the warp yarns. The sley movement is an essential part of the weaving process, and it is important to understand the construction and operation of the sley. In this lab manual, we will study the sley movement, the construction of the sley, and the calculation of sley eccentricity.

Equipment Required:

1. Weaving Machine
2. Sley
3. Measuring Tape
4. Vernier Caliper
5. Stopwatch

Procedure:

1. First, we need to understand the construction of the sley. The sley consists of a set of metal or wooden bars that are mounted on a frame. These bars are called reeds, and they are responsible for beating the weft yarn into place.
2. Observe the motion of the sley during the weaving process. The sley moves back and forth to beat the weft yarn into place.
3. Measure the distance traveled by the sley during one weaving cycle. This can be done by measuring the distance between the starting point and ending point of the sley.
4. Calculate the eccentricity of the sley. Eccentricity refers to the deviation of the sley’s center of motion from its geometric center. To calculate eccentricity, measure the distance from the center of the sley to the center of motion. Use a Vernier caliper to measure the distance.
5. Calculate the period of sley movement. This refers to the time taken by the sley to complete one weaving cycle. Use a stopwatch to time the period of sley movement.
6. Analyze the motion of the sley and observe any signs of misalignment or irregular motion.
7. Make any necessary adjustments to the sley mechanism to ensure that the motion of the sley is smooth and consistent.
8. Run a test weave to check the quality of the fabric. Make any necessary adjustments to the sley mechanism and tension of the yarns.
9. Once the test weave is successful, continue weaving the desired pattern.

Conclusion:

In this lab manual, we studied the sley movement, the construction of the sley, and the calculation of sley eccentricity. By observing the motion of the sley and making any necessary adjustments to the sley mechanism, we can ensure that the motion of the sley is smooth and consistent, resulting in high-quality woven fabric. By following these steps, we can produce high-quality woven fabric using a weaving machine.