Fault in tappet shedding mechanism

1. If the tappet is fault, it impart a jerky movement to the heald shaft.
2. The tappet should always touch the bowls, otherwise a serve blow is applied to the bowl & the variation is transmitted to the heald shaft. end breakage may occur ad result to this
3. Over shedding: if  the depth of a shed is too much, strain on the warp will be more & end breakage may occur
4. Under shedding: if the depth of shed is too low, the shuttle will not reach the other end and may be trapped in the shed or may fly out, hence end breakage will increase
5. Uneven shedding: uneven shedding cause by lifting one end of the heald shaft more than other so the shuttle may move over some warp thread and fly out or trapped in the shed
6. If the shedding is mistimed, they other motion like picking & beat-up can not be done smoothly and end breakage may occur.