School test of double scale fabric

School test of double scale fabric:
Double fish scale fabric is also called double yuan treasure needle. In the triangle adjustment, the triangles No.1 and No.3 are moved upwards, and the upper pressure plate is used to limit the position, and the hanging arc is woven. The No.2 and No.4 triangles are opened downwards. The platen is limited to weave the elongation coil. When weaving the ribbed (four-flat) fabric, we should lower the No.1 and No.3 triangles (opening), and the lower platen is limited. The No.2 and No.4 triangles Lift up and weave with the upper platen limit. The density of the fabric is tight and is adjusted and controlled by the depth of the No. 2 and No. 4 triangles.
Note on school test:
(1) Weaving of double-fish scale fabrics, for the arrangement of the side needles, the fish scales shall be opened on the 1st and 3rd, and the needles of the front needle bed and the 3rd position of the rear needle bed shall be arranged in a row to avoid the weaving. The needle falls off causing the fabric to smash.
(2) The height of the looping triangle should be increased, so that the hooks can be hooked to the new mat yarn, which should not be too high or too low. Too high, easy to leak the needle, too low, to have a "needle".
(3) When the machine piece is off the machine, be sure to relax the No. 1 triangle of the suspension arc before the piece can be removed.