Divided draft and combined draft are two important drafting systems. This two drafting system is not so used as straight, skip, point, broken, grouped or curved draft. Here, I have given the features of divided and combined draft.
Features of Divided Draft: The features of divided draft are given below:
- Shafts are divided into two or more groups.
- A suitable type of draft is chosen for each group.
- Divided drafts are employed for Divided weaves, Double warp weaves, and Two Ply weaves, Pile weaves and some others.
Features of Combined Draft: Combined draft has some characteristics, which is given below.
- When two or more drafts are combined in one draft for producing a certain type of fabric, then it is known as Combined Draft.
- Combined draft is a complicated draft.
- It can be chosen if there are some technological or economical reasons.
- For doing this design a designer should have great knowledge about the drafting plan.
That’s all about the characteristics of grouped draft and combined draft.
Grouped draft is generally used for produce check or stripe design of the woven fabric. Curved draft is used for producing fancy design with a large repeat unit.
Characteristics Of Grouped Draft: The characteristics of grouped draft are given below.
- Check and stripe designs are produced by grouped draft.
- The repeat of draft is determined by the number of stripes and the number of threads in each stripe.
- The number of shaft in the draft depends on the number of stripes and warp repeat of weave of each repeat.
Characteristics Of Curved Draft: The characteristics of curved draft are given below.
- Curved draft is applied for Fancy weaves having a large warp repeat.
- It is used to reduce the number of heald shafts in a repeat.
- Curved drafts are irregular and cannot be classified.
- The maximum number of shafts equals the number of threads in warp repeat with different order of interlacing.
So, that’s all about grouped draft and curved draft.
Point draft or V-Draft and broken draft are the two important drafting system of woven design. Various types of critical drafting plan are done by this two.
Properties of Point Draft or V-Draft: The properties of point draft or V-draft are given below.
- Point draft is used for woven structures which are symmetrical about the centre and they are frequently employed to produce diamond effect.
- It is used where the straight draft cannot be applied because of large repeat.
- The point draft can be considered as a combination of straight drafts, constructed firstly in one direction and then on other.
- The change in direction takes place on the first and last shafts of the draft which are the point of reversal.
- The first and last shafts carry only one end each whilst all the heald shafts in the middle carry two ends per repeat of the draft.
- So, the number of ends per repeat of the design is calculated as = (2 x Number of heald shaft) – 2.
Properties Of Broken Draft: The properties of broken draft are given below. They are as follow:
- Broken draft can be considered as a modified Point draft.
- This is a combination of straight drafts with different directions of construction.
- But the direction is reversed not on the last or the first shaft. When the direction is reversed, the first thread of the next group is started higher or lowers than the last thread of proceeding group.
- Herring Bone Twills, Diaper design and some other weave is produced by applying this broken draft.
So, that’s all about point draft and broken draft.