Comparison between electronic opening loom and cam and dobby loom ③(AJL)

① The angle of repose can be changed for each frame, and no mechanical adjustment is required.

A normal dobby loom, the angle of repose (also called the dwell) cannot be changed.
In the case of a cam loom, the cam needs to be replaced.
However, with the electronic opening loom, the angle of rest can be changed for each frame, and it can be changed only by setting with the panel.

静止角 → Angle of repose , 枠高さ → frame height , 最上点 → Highest point ,
中点 → middle point , 最下点 → lowest point , クロスタイム → Close time

The above figure is an image of plain weave frame operation, but a and b in the figure are called the angle of repose.
For example, if the setting is (0/120), the frame will not stop at the highest point, and the frame will stop at about 120 ° at the lowest point.

② About the effect of changing the angle of repose

The greater the difference in the angle of repose b-a, the easier it is to drive the reed.
This is the recommended setting when weaving high density fabrics.
This is due to the large difference in tension between the upper and lower warp threads when beating.
The reason for raising the back when the bumping (vibration when striking) is large is the above reason.


In the case of woven fabrics such as striped woven fabrics, in which the warp tension difference is likely to occur systematically,
the more the warp threads cross each other (plain weave, etc.)
For tissues with less warp crossing (such as twill and satin),
reducing the angle of repose will improve the tension difference between the warp threads.