Relationship between opening and relaxation device
If there is no positive relaxation device
Tension is applied to the string when it is opened, but the tension applied to the string is loosened when it is closed.
In such a case, it is not suitable for high-speed weaving.
This is because poor opening is likely to occur.
If there is positive relaxation device
The tension roller is moved back and forth according to the opening operation of the warp. Then, the tension fluctuation of the warp is absorbed.
In such a case, it is suitable for high-speed weaving.
If you do positive relaxation exercises other than plain weave, extra stress will be applied to the warp strings.