**Knitting Production:**

Knitting is a method by which thread or yarn is used to create a cloth. It is the interlocking of one or more yarns through a series of loops. In the case of knitting production, the knitter or knitting master has to apply some formula. In this article, I will give some essential formula which will be effective for newcomers in knitting.

**Essential Formula for Knitting Production:**

**WPI:**Wales per inch is called WPI.**CPI:**Course per inch is called CPI.**GSM:**Grams per square meter of the fabric are called GSM.

**Needle Calculation Formula: **

- Single jersey circular knitting machine needle = ∏DG
- Rib/Inter lock /Double jersey circular knitting machine needle = ∏DG×2 (two needle bed is here)
- Single bed flat knitting m/c’s needle = width× gauge
- GSM = {WPI× CPI × (39.37)2×stitch length (mm) ×Tex /1000× 1000} g/m2
- Stitch density = (WPI × CPI) inch-2 = (WPC ×CPC) cm-2
- No of sinker = No of needle
- No-Wales =No of needle
- No, of course, = No of feeders =No of yarn (per revolution of cylinder)
- Course per minutes = No of feeders ×cylinder rpm
- Course length = yarn required for each course. = No of needle × stitch length

*** V bed flat knitting m/c’s needle = 2× width× gauge

Here,

D = cylinder diameter,

G = Machine gauge ,

Needle pitch = 1/G.

*** **Fabric width** = wale spacing ×Total no of Wales

= (1/WPI ×No of Needles) inch

= (No of Needles/WPI× 39.37) meter

*** **For single jersey fabric** = (∏DG/WPI×39.37) meter (open width)

= (∏DG/WPI×39.37) meter/2(Folded/Tubular width)

*** **For double jersey fabric** = (2 × ∏DG/WPI×39.37) meter (open width)

= (2×∏DG/WPI×39.37) meter/2(Folded/Tubular width).

*** **Fabric Length** = Course spacing ×Total course pr hour

= {(Feeder× cylinder rpm× 60)/CPI} inch/hour

= {(Feeder× cylinder rpm× 60)/CPI ×39.37} m/hour

**You may like also: Knitting Production Formulas, Problems and Solutions**

Author of this Article:Rofiquzzaman RajuFabric Technologist, B.J.Group, Mawna, Gazipur Email: rtextile.finance@gmail.com

valo

excellent

Its a clumsy formula but you described perfectly.