A twill weave is characteristics by diagonal ribs (twill lines) on the face of the fabric. These twill lines are produce by letting all warp ends interlace in the same way but displaing the interlaceing points of each end by one pick relative to that of the previous end while the plain weave can only be woven in one form, there exit several options with regrad to twills.
Shedding is the operation by which the warp is divided into two sheets so that sufficient gap is created for the uninterrupted passage of the weft from one side of the loom to the other.
The weaving m/c is technically termed as loom .The loom is a device or m/c in which interlacement of warp and weft yarn performed and thus fabric is produced. In 1930's, eventually, each weaving machine driven individually by an electric motor was developed, this loom drive concept has remained in use until the present.
The various drafts are classified as follows:Straight draft,Skip draft,Satin draft,Pointed draft,Broken draft,Divided draft,Grouped draft,Combined draft,Curved draft.