Zipper reciprocating fatigue testing machine before the test preparation 1, adjust the knob until the pull tab clamping device B is at its highest position and insert a fixed pad in this unit. 2. Fasten the zipper pull tab to the pull tab clamping device B. 3, the first zipper tail (lower end) is roughly fixed in the upper part of the head on the A point (at this time the head center line and the zipper center vertical). 4, the zipper front (upper end) fixed in the two longitudinal head E point. 5, slightly loose the upper part of the clip A fixed point, pull the end of the zipper pull up so that the horizontal axis of the rotating plate G parallel with the film H, and then clamp the top of the head A point (at this time visual longitudinal head two E points in the same On the horizon) 6, according to zipper type adjustment Longitudinal spring scale J upper and lower nuts Apply zipper tape with the appropriate vertical load as follows: 7. Adjust the knob until the pull...