抄録
Experiments have been successfully made to establish a method of measuirng warp tension and letting-off length per pick in weaving and of judging quantitatively by this method the efficiency of the Let-Off Motion Device (explained later) while it is running.
Results of Research
(1) The method to measure warp let-off length per pick has been established with the aid of cameras, a pick counter and a Xenon electric discharge tube. By this method, the maximum error is 0.3% and the time needed for each measurement is within 3 minutes.
(2) The whole warp tension has been measured with the aid of steel rings, a strain meter and an electro-magnetic oscillograph without turning the channel of the warp yarn. The maximum error is estimated at ±5%.
(3) Warp tension and letting-off length per pick have been measured with the Negative and Positive Let-Off Motion Devices (explained later) and the quantitative efficiency of both Positive and Negative Let-Off Motion Devices determined.
