Dobby pegging and lagging
This is a process by which the lags are connected to each other and pegs are fixed to the lags.
The pegs are mounted at places where cross mark is indicated in the design.
It is very important to note the direction of cylinder in relation to pegging.
For example, let us consider a design 8 picks as shown in figure.
No. of picks per lag=2
No. of lags required = Total Pick in design / 2
=8/2= 4 lags
The two rows must be staggered.
Significance of cylinder rotation in relation to pegging:
If the cylinder is rotating in clockwise direction found in right hand dobby’s, 8th pick will be presented as 1st pick that is the design will be reversed.
If the design is planned for left hand dobby where the cylinder rotates in anticlockwise direction. In left hand dobby with cylinder in anticlockwise direction, the first pick will be presented to cylinder, thus there will not be change in design.
For example, consider the basic design as Z twills with inclined lines from left to right. If this design is mounted in right hand dobby with clockwise cylinder rotation, the design will be obtained as S twill with lines moving from right to left. Therefore one has to consider the direction of rotation of cylinder in relation to pegging.