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Quality control
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The two main contributing factors to the quality control on knitting machines are.
Stitch density and stitch length.
Other contributing factors on the machines are.
Yarn tension [Input Tension] and fabric take down [Output Tension].
Other external contributing factors are.
Uneven thickness of yarn, package hardness, uneven winding, temperature ,humidity etc.
The gauge of machine .
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Courses and Wales
Wale
Course
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Stitch density
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Stitch density is used on both flat and circular knitting machines. For checking quality and reproducing the same fabric quality at a later date.
The total number of loops in a square area measurement = courses x wales.10 courses by 10 wales = 100.
If this changes the fabric will become thicker or thinner
Can be changed by yarn thickness , yarn twist , input tension , out put tension and stitch settings .
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Heads Legs and Feet
Feet
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Feet
Head
Legs
Feet
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Legs
Feet
Technical back and front.
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Yarn Path Notation
This is a schematic diagram created on special point paper, which describes the delivery of the yarn on to the needles during knitting
• Information to be included.
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Needle and needle systems
• Knitted loop, tuck loop, miss loop or transfer loop and rack
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Description of Point Paper
• Point paper has equally spaced dots , that are arranged in horizontal rows.
• Each dot represents a needle
• A row of dots represent the needles in a needle bed
• Each row contains the knitting information of a course.
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Two types of point paper
First Point Paper = Parallel
Used to represent purl structure patterns, interlock based patterns or Warp patterns
Rear needle bed
1st
course
Front needle bed
2nd course
Rear needle bed
Front needle bed
3rd course
Rear needle bed
Front needle bed
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Two types of point paper
First Point Paper = Staggered
Used to represent Rib knitting
1st course
2nd course
3rd course
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Important !
Point Paper Parallel .
Used to represent purl, interlock and warp fabrics
Point Paper Staggered.
Used to represent rib fabrics .
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Symbols for yarn path notation weft knitting
Back needle knitting
Front needle knitting
Back needle tucking
Front needle Tucking
Float
Transferring stitch from back bed to front bed
Transferring stitch from front bed to bed back
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Plain, single bed = V bed Flat machine.
Single Jersey = Circular machine.
Show animation
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Plain knit [V bed flat]or single jersey [circular]
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Plain knit [V bed flat]or single jersey [circular]
Direction of 1st knitted row
Back bed
----------------Front bed
Back bed
----------------Front bed
Direction of 2nd knitted row
Fabric Properties.
Technical back and technical front are different. different Face stitches on the front reverse
