Automatic test device and test method for yarn linear density and weight eveness

Aiming at the defects which exist in present yarn linear density test device,an automatic test device about yarn linear density and weight eveness was developed.This device included electronic balance,spring linear pressure,electronic calculation length,frequency conversion winding and controller.Test procedures and methods about linear density and weight eveness were introduced using this device.A linear density contrast test was performed taking T/R65/35 bobbin yarns and JC/T50/50 tube yarn for example,and practice showed: its accuracy of the test results was 99.6%,while the test results accuracy using traditional device was only 95%,test process was convenient,yarn was continuous,waste yarn generation is prevented,and the test device also had smaller volume,and so had higher application and promotion value.