Menu

Thread Consumption Equation

Thread consumption may be carried out by an equation that is derived from stitch geometry for various stitch types. The equation is flexible and applicable to any given length of the seam, they are shown for one inch only, and may be multiplied by the length of the seam to determine the total thread consumed. 


The following variables are considered to develop mathematical equations.

C
=
Consumption per inch
W
=
Width of seam
T
=
Thickness of materials
S
=
Stitch per inch
N
=
Stitch length in inch
N X S
=
1 (as 1 ÷ S = N)
(*)
=
2W+N assumes for cover thread

Stitch Types
Stitch Name
Equation
101
Single-thread Chain Stitch
C = 3 + 2TS
301
Lock Stitch
C = 2 + 2TS
401
Two-thread Chain Stitch
C = 4 + 2TS
406
Cover-seaming Stitch
C = 7 + 2S(T+W)
407
Cover-seaming Stitch for Attaching Elastic
C = 9 + 2S(3T+W)
504
3-Thread Overlock
C = 4S(W+T) + 3
514
4 Thread Mock Safety
C = 5 + 2S(3T+2W)
516
5 Thread Safety Stitch
C = 2S(2W+3T) + 9
*602
Cover Stitch
C = 8 + S(5W+4T)
*605
Cover Stitch
C = 10 + 2S(2W+3T)
*607
Flat Seaming Stitch
C = 12 + 4S(W+2T)
The above equations are developed for commonly used stitch types.

Derivation of equation summary

Stitch class - 101
C = (3N + 2T)S
    = 3NS + 2TS
    = 3 + 2TS         (N X S = 1)

Example,
Stitch class - 101
SPI (S) = 10
Stitch Length (N) = 0.10
Seam Thickness (T) = 0.05 

C = 3 + 2TS
   = 3 + 2*0.05*10
   = 4

Stitch class - 301
C = (2N + 2T)S
    = 2NS + 2TS
    = 2 + 2TS         (N X S = 1)

Example,
Stitch class - 101
SPI (S) = 10
Stitch Length (N) = 0.10
Seam Thickness (T) = 0.05 

C = 2 + 2TS
   = 2 + 2*0.05*10
   = 3

Stitch class - 401
C = (4N + 2T)S
    = 4NS + 2TS
    = 4 + 2TS         (N X S = 1)

Example,
Stitch class - 401
SPI (S) = 10
Stitch Length (N) = 0.10
Seam Thickness (T) = 0.05 

C = 4 + 2TS
   = 4 + 2*0.05*10
   = 5

To understand the fact clearly, you have to draw the stitch geometry.


Ref.
http://www.unionspecial.com/

5 comments:

  1. I really liked the detailed information that was given by you on the thread consumption. It really helps the readers. LED TV Repair Bangalore. I definitely share your blogs with others.

    ReplyDelete
  2. I like how thorough you were with your explanations about thread consumption. It is quite beneficial to the readers. Please take a look at cheap polo shirts

    ReplyDelete
  3. Thanks , I have recently been looking for info about this topic for ages and yours is the greatest I have discovered till now. But, what about the conclusion? Are you sure about the source? soft commodities index

    ReplyDelete