①-1 Confirmation of reaching angle
Check if the weft arrives too late or too early.
Determine the timing of arrival at each sub-nozzle from the timing of arrival of the weft.
Then, check if the injection timing of the sub nozzle is late.
①-2 Confirmation of standard deviation
If the standard deviation varies widely, it may be prone to end curling.
In many cases, the pressure of the sub-nozzle is not the proper air pressure, or the injection timing is not right.