# Textile Calculation

Problems and solutions of textile

## Production Formula for Knitting Section

Production Formula for Knitting Section
Rofiquzzaman Raju
Fabric Technologist,
B.J.Group, Mawna, Gazipur

Knitting production is completely mathematical based. Knitting master or knitter or production manager of knitting section has to do lot of calculation for optimum production of knitting. I thing the following formula will help a knitter to find out better production .
 Knitting section
***Production/shift in Kg at 100% efficiency,

RPM x No. of Feeder x No. of Needle x SL (mm)
= ……………………………………………………………
3527.80 x Yarn count

***Production/shift in meter,

Course/min
= …………………
Course/cm

RPM x No. of Feeder x 60 x 12 x Efficiency
= ……………………………………………………
Course/cm x 100

***Fabric width in meter,

Total no of wales
= ………………………
Wales/cm x 100

Total no. of needles used in knitting
= …………………………………………
Wales/cm x 100

***Running Length (L),

Machine rpm x No. of Feeder x Efficiency x 60
= ………………………………………………..............………. m/hr
No. of Feeders per course x Courses per cm x 100

***Fabric width (WB),

Cylinder diameter in inch x Machine Gauge
= ……………………………………………...……. m
Wales/cm x 100

***Production in Kg,

Running length in meter per hour x WB x Weight in GSM
= ……………………………………………………….........………. Kg/hr
1000

Weight (in gm) x 39.37
***Length Calculation = ………………………………
Width (in inch) x GSM

***Production per shift in KG at 100% efficiency,

RPM x no of feeder x no of needle x stitch length (mm) x 60 x 12
= ……………………………………………………………….......…………
10 x 2.54 x 36 x 840 x 2.2046 x yarn count

Ks x 590.5
***Stitch length = …………………………
Count (Ne) x GSM

Where,

Ks = knitting constant
Count = linear density of yarn
GSM = gm per square meter

Another formula is:

***Stitch length = (Tex × Ks) / GSM

Ks is a constant. Its value is different for different fabric structure and fabric type. Ks is calculated and estimated as below:

Ks = (GSM x Stitch length) / Tex