What is Picking?
Picking is the second primary motion in weaving. The action of inserting weft yarn through the warp yarns is called picking. Under picking is controlled by a picking cam which is fixed on the bottom shaft. At first, the motion comes from the motor and m/c pulley. Picking is two types. One is over picking and another is under picking. In the previous article, we have discussed over picking mechanism. Now I will give a flowchart of the under cone picking mechanism of the loom.
Working Flow Chart of Cone Under Picking:
The tappet is driven by the bottom shaft
When the picking tappet strikes the picking cone, it displaced and the side shaft is turned
The turning action of the side shaft pulls the picking stick which is connected to the side shaft by a picking a strap
The lower end of the picking stick is pivoted. So that is pulled with the pulling of side shaft
Then the picker connected to the picking arm strikes the shuttle and causes it to pass through the warp shed
Picking is done
- Side lever.
- Side shaft.
- Tappet / cam.
- Picking stick.
- Shuttle box.
- Motor pulley.
- Rase board.
- Bottom shaft.
- Crank arm.
The motor supplies the power, when the motor pulley rotates the m/c pulley is also rotate and the crankshaft wheel gets power for rotating. Thus crank shaft wheel teeth are half the bottom shaft wheel. So, the crankshaft wheel rotates two times that time the bottom shaft wheel rotates one time. Then picking wheel also rotates due to fixed. In the parallel pick method, a curved shoal fixed to the bottom of picking sticks rides on a horizontal plate fixed to the sley sword. When the bowl rotates and to give pressure on the side shoe and l- level moves to forward direction and weft is occurred.
You may also like: Working Flow Chart of Cone Over Picking Mechanism
Author of this Article: Rofiquzzaman Raju Fabric Technologist, B.J.Group, Mawna, Gazipur Chittagong Textile Engineering College Contact: 01714419681