Introduction- There are three primary motions on a loom (weaving machine). Primary motions are: shedding, picking and beating up. shedding Picking Beating 4/6/2015 3. Shedding: Raising or lowering of the warp yarns by the hardness (wire) to make an opening for the weft yarn to pass through.
What is secondary motion of weaving?
SECONDARY LOOM MOTIONS, TAKE-UP MOTION AND LET-OFF MOTION
The loom motions which help to weave a fabric continuously are called secondary loom motions. The fabric can be woven without these motions too, but you can’t keep the weaving process continue without secondary motions.
What are the primary and secondary motion?
Primary motion stimuli (Φ-motion). … However, for secondary motion stimuli the movement is not accompanied by a corresponding luminance shift. Instead, moving objects are defined by their temporal frequency composition (μ-motion) or by motion itself (θ-motion).
What is auxiliary motion in weaving?
In order to produce a good quality of cloth and to prevent damages it is necessary to have some stop motion provided on the loom. They can be termed as auxiliary motions. Auxiliary motions are added to a loom to get high productivity and good quality of fabric. These motions are useful but not absolutely essential.
Which motion helps to improve the fabric quality?
Weft Stop motion
This motion stop the loom, if the weft is not present in the shuttle or there is a missing Weft.It is a very important motion and helps to improve the quality of fabric.
What are types of motion?
Everything naturally wants to move and change. In the world of mechanics, there are four basic types of motion. These four are rotary, oscillating, linear and reciprocating.
What is primary motion in textile?
Picking: Passing the weft thread, which traverses across the fabric, through the shed. Beating-up: Pushing the newly inserted length of weft, known as the pick, into the already woven fabric at a point known as the fell.
What is weft fork motion?
Side fork motion or weft fork motion ( an auxiliary loom motion) The side fork motion is an auxiliary loom motion. The main objective of side fork motion is to stop the machine immediately in case of weft insertion failure during weaving. The side fork motion is mounted at the starting handle side of the loom.
What is loom cycle?
Loom timing is defined as relative chronological sequences of various primary and secondary motions are expressed in terms of degree of crank shaft rotation. … The start and end of events are influenced by loom type, fabric width and fabric type. The loom timing cycle is shown in below Figure.
What is periodic motion with example?
periodic motion, in physics, motion repeated in equal intervals of time. Periodic motion is performed, for example, by a rocking chair, a bouncing ball, a vibrating tuning fork, a swing in motion, the Earth in its orbit around the Sun, and a water wave.
Why is beat up motion necessary in weaving?
This is the beating-up motion and the cloth increases in lengthwise in this way. Conclusion: To make a woven fabric interlacement of warp and weft yarns is the main condition. That’s why beat-up mechanism is a very essential motion for weaving.