Introduction: Shedding is the first primary motion of the loom motions. Dividing of warp threads into two parts for insertion of weft thread is called shed, and the mechanism to form shed is called shedding. There are two types of shedding – 1) Positive shedding and 2) Negative shedding. Basic shedding mechanisms are Paddle/treadle, Tappet,…
Experiment name: Study on driving mechanism and production calculation of tappet loom. Introduction: A tappet having a rotary motion depresses a follower and a lever, known respectively as the anti-friction bowl and the treadle arrangement, by means of which the heald shaft is operated. A tappet is a cam having some dwell period which controls…
Dwell period: Dwell is the stationary period when the heald frames do not change their position and the shade remains open to allow the passage of the shuttle from one shuttle box to the other. In this article, we will discuss the calculation of loom timing. Timing of loom: The timing in the loom cycle…
What is Loom? The loom is an apparatus/device for making fabric by weaving yarn or thread. It produces fabric by interlacing a series of length-wise, parallel yarns width a series of width-wise parallel yarns. To get the optimum output of the loom we must know about the loom production calculation. In this article, I have…
Secondary motions of loom: The secondary motions of the loom mainly are concerned with moving the fabric through the different parts of the loom. It comprises of taking up and let off motions. The take-up motion helps to wind the cloth onto the cloth roller and also influences the pick density in the cloth. The…
In this article, calculate the crimp percentage of Woven Fabric will be discussed. The crimp percentage is the difference between straightened thread length and the distance between the ends of the thread in the fabric. Crimp % = (l-s)/s x 100 Measuring crimp practically is not always a simple procedure. The length of the crimped…
