WRONG END:
This is a very common fabric defect appearing on the fabric surface during weaving. The ends of the warp beam are drawn through an eye of the heald wire and the dent of the reed according to draft and denting order. But due to drawer’s mistake, the drawing sequence or denting order is missed or skipped during the drawing process. Sometimes, the drawing sequence or denting order is also changed because of unknown reason while weaving is still in progress. If an end is not appearing on the fabric surface according to draft and denting order, then this kind of fabric defect is termed as “the wrong end”. Two kinds of the wrong end may appear in the fabric there.
This is a very common fabric defect appearing on the fabric surface during weaving. The ends of the warp beam are drawn through an eye of the heald wire and the dent of the reed according to draft and denting order. But due to drawer’s mistake, the drawing sequence or denting order is missed or skipped during the drawing process. Sometimes, the drawing sequence or denting order is also changed because of unknown reason while weaving is still in progress. If an end is not appearing on the fabric surface according to draft and denting order, then this kind of fabric defect is termed as “the wrong end”. Two kinds of the wrong end may appear in the fabric there.
WRONG DRAWING:
The wrong end (fabric defect) appearing on the fabric surface due to wrong drafting of warp end through the heald eye of heald wire is called “wrong drawing”.
It appears vertically in the fabric. The main cause of this defect is a human error during drawing – in. Many times drawer misses the drawing sequence or skips draft by mistake. This mistake results in the wrong end (wrong drawing) on the fabric surface. Weaver should always check and verify the draft before starting the loom.
Now a question may arise in weaver’s mind, how can he make sure that there is not any wrong drawing in the fabric? There is very simple and effective way to check and verify the drawing mistake in the loom. First of all, raise the first heald shaft to keep remaining heald shaft in lowering position and check the drawing sequence of the first heald shaft. If there is any mistake, it can be seen and judged quickly and accurately. Now raise the next shaft, keep the remaining shaft in lowering position and check the sequence. This process is repeated for all heald shafts. Now weaver may be fully sure about wrong drawing.
The wrong drawing may also be generated while the loom is still in operation. How does it happen? The most of the time, this defect occurs due to weaver’s mistake during mending the broken end during weaving. If two adjacent end break at the same time, the weaver does not follow the drafting sequence properly. This weaver’s mistake results in wrong drawing in the fabric.
Another reason for wrong drawing during loom still in operation situation is the warp stop motion. If the loom stops late after warp breakage, the broken end is entangled with the adjacent end and is passed through the eye of heald wire without stopping the loom. This may also happen due to excessive hairiness in the warp yarn. This entangled end passes through the dent of the reed with an adjacent end. The weight of the drop pin should be chosen precisely according to the warp count. The improper selection of drop pins may be the cause of the late stop of loom after warp breakage. Weaver should always be aware of this situation.
The wrong end (fabric defect) appearing on the fabric surface due to wrong drafting of warp end through the heald eye of heald wire is called “wrong drawing”.
It appears vertically in the fabric. The main cause of this defect is a human error during drawing – in. Many times drawer misses the drawing sequence or skips draft by mistake. This mistake results in the wrong end (wrong drawing) on the fabric surface. Weaver should always check and verify the draft before starting the loom.
Now a question may arise in weaver’s mind, how can he make sure that there is not any wrong drawing in the fabric? There is very simple and effective way to check and verify the drawing mistake in the loom. First of all, raise the first heald shaft to keep remaining heald shaft in lowering position and check the drawing sequence of the first heald shaft. If there is any mistake, it can be seen and judged quickly and accurately. Now raise the next shaft, keep the remaining shaft in lowering position and check the sequence. This process is repeated for all heald shafts. Now weaver may be fully sure about wrong drawing.
The wrong drawing may also be generated while the loom is still in operation. How does it happen? The most of the time, this defect occurs due to weaver’s mistake during mending the broken end during weaving. If two adjacent end break at the same time, the weaver does not follow the drafting sequence properly. This weaver’s mistake results in wrong drawing in the fabric.
Another reason for wrong drawing during loom still in operation situation is the warp stop motion. If the loom stops late after warp breakage, the broken end is entangled with the adjacent end and is passed through the eye of heald wire without stopping the loom. This may also happen due to excessive hairiness in the warp yarn. This entangled end passes through the dent of the reed with an adjacent end. The weight of the drop pin should be chosen precisely according to the warp count. The improper selection of drop pins may be the cause of the late stop of loom after warp breakage. Weaver should always be aware of this situation.
WRONG DENTING:
The wrong end (fabric defect) appearing on the fabric surface due to wrong denting order of warp ends through the dent of the reed is called “wrong denting”. It appears vertically in the fabric. The main reason for this defect is a human error either during reed drawing or during mending of broken warp by loom operator. If the drawer misses or skips the denting order during drawing – in, it results wrong denting on the fabric surface. Loom operator’s mistake also results wrong denting in the fabric. Loom technician should make sure about the wrong denting just before starting the loom. The same procedure should be followed which has been adopted in the identification of wrong drawing. This defect may also be generated during loom still running position. The broken warp can be entangled and passed with adjacent end through the dent of the reed. The remedies of this problem are the same as wrong drawing.
The wrong end (fabric defect) appearing on the fabric surface due to wrong denting order of warp ends through the dent of the reed is called “wrong denting”. It appears vertically in the fabric. The main reason for this defect is a human error either during reed drawing or during mending of broken warp by loom operator. If the drawer misses or skips the denting order during drawing – in, it results wrong denting on the fabric surface. Loom operator’s mistake also results wrong denting in the fabric. Loom technician should make sure about the wrong denting just before starting the loom. The same procedure should be followed which has been adopted in the identification of wrong drawing. This defect may also be generated during loom still running position. The broken warp can be entangled and passed with adjacent end through the dent of the reed. The remedies of this problem are the same as wrong drawing.
Related articles:
Loose end in the fabric, a fabric defect
Missing weave or missing design in the fabric, a weaving defect
Oil mark, grease mark, dust mark and stain mark in the fabric
Reed mark in the fabric, a fabric defect
Bowing in the fabric, a fabric defect
Objectives of calendaring process, types of calendars, structure and working principle of calendaring machine
TYPES OF YARN, CLASSIFICATION OF YARN
Loose end in the fabric, a fabric defect
Missing weave or missing design in the fabric, a weaving defect
Oil mark, grease mark, dust mark and stain mark in the fabric
Reed mark in the fabric, a fabric defect
Bowing in the fabric, a fabric defect
You may be also interested in the below articles:
Objectives of calendaring process, types of calendars, structure and working principle of calendaring machine
Objectives of singeing, types of singeing machines, structure and working principle of singeing machines
PRE - TREATMENT PROCESS OF NATURAL CELLULOSIC FABRICS OR FABRIC PREPARATION FOR DYEING
CHEMICAL COMPOSITION OF COTTON FIBRE, CHEMICAL FORMULA OF COTTON FIBRE, CROSS SECTIONAL VIEW OF THE COTTON FIBRE
Definition of a stitch in knitting process and different type of stitches in weft knitting process
Differences between weft knitting and warp knitting process
Different types of fancy yarns
TYPES OF YARN, CLASSIFICATION OF YARN
GENERAL TERMS TO BE USED IN TEXTILE
HOW TO FIND YARN COUNT FOR GIVEN FABRIC GSM:
SCHEMATIC DIAGRAM OF LOOM
FABRIC ANALYSIS
CLOTHE OR FABRIC COVER FACTOR CALCULATION
Verdol Jacquard or fine pitch Jacquard shedding mechanism
Double-lift and double-cylinder jacquard shedding mechanism
You may also be interested in the below-sponsored links:
Structure and working principle of water-jet loom weft insertion system
Types of rapier weft transfer process, Negative weft transfer and positive weft transfer
Rapier weft insertion system l Types of rapier looms l Weft yarn passage and working principle of rapier weft insertion system
An introduction about shuttleless weaving ( a non conventional weft insertion system)
Parallel picking or parallel weft insertion systems
Structure and working principle of water-jet loom weft insertion system
Structure and working principle of projectile loom weft insertion system
Types of rapier weft transfer process, Negative weft transfer and positive weft transfer
Rapier weft insertion system l Types of rapier looms l Weft yarn passage and working principle of rapier weft insertion system
An introduction about shuttleless weaving ( a non conventional weft insertion system)
Parallel picking or parallel weft insertion systems
Structure and working principle of water-jet loom weft insertion system
Structure and working principle of projectile loom weft insertion system
No comments:
Post a Comment