Width Calculation of Knitted fabric
Width of Fabric:
Fabric width is formed by courses that are laying crosswise (loops in horizontal direction).
So, Width=loop Dia* no of loops
Width=loop Dia* no of course
Width=loop Dia* no of needles
According to this equation the width calculation should be easy and loop should stay like the image cited below:
But every circle share part of circle of both sides. Fabric width from this equation will be less than actual width because the loop circles placed consecutively shares both sides with preceding and successive loops (Figure 3).
Now let’s make relation between values from this equation & actual values and see how much closer they stay.
Table 1 shows that the actual width and the width from the equation always maintain approximately same ratio among themselves.If this ratio can be considered as a constant actual width of the fabric can easily be derived.
So the equations can be written as considering R as a constant as it shows in the Table 1.
The value of R for Single jersey is 1.25-1.30 and for 1*1Rib is about 1.00 and for others fabric type’s value of R can be calculated.
Variation of R is related withtype of fabric construction, needles number, yarn types and composition, machine tension, speed, and tightness factor.