When we operate a sewing machine, there are many operating points, which ones do you know? Today, we will share them to you and hope you to get more information from this paper.
(1) Threading: Thread the needle and looper threads in the prescribed order, otherwise it will result in no sewing, broken threads or skipped threads.
(2) Thread tension: the tension of the thread is an important aspect of successful sewing, improper adjustment will result in thread breakage, skipped stitches and scratched bags. Heavy materials (such as sacks) thread tension regulator slightly relaxed; light materials tighten the thread tension regulator; according to the needle pitch and bag thickness of the different adjustments to the feed rate of the thread; in the adjustment of the needle and thread loosening and tightening, must be adjusted accordingly to the loosening and tightening of the ring beater thread.
(3)Presser foot pressure: If the reverse side of the sewing thread looks like the traces of being cut by the feeding teeth, or the actual stitch length is smaller than the preset feeding rate of the feeding teeth, then it indicates that the pressure is too high, and the needle plate spring adjustment screw should be loosened at this time; if the sewing thread is not straight or uneven, then the needle plate spring adjustment screw should be tightened to increase the pressure; in addition, the pressure is reduced in sewing burlap sacks and other heavy materials, and the pressure is reduced in sewing plastic In addition, reduce the pressure when sewing sacks and other heavy materials, and increase the pressure when sewing plastic bags and other lightweight materials.
(4) Adjustment of the loop punch: Turn the belt pulley in the forward direction and adjust the double-arm crank so that when the needle is in the maximum stowed position, the broken end of the loop punch leaves the centerline of the needle by 7mm.
(5) Adjustment of the feeding mechanism: make sure that the cloth feeding teeth do not touch the needle plate when passing through, there should be a gap of 1.5mm between the middle teeth of the front feeding teeth and the needle plate; the rear feeding teeth should be adjusted lower than the front feeding teeth by 0.1mm, and the width of the needle foot can be adjusted from 7mm to 11.5mm according to the need; when the width of the needle foot is changed, the gap between the needle guide plate and the needle will be changed, so the needle guide plate must also be adjusted accordingly.
(6) Adjustment of scissors: In order to make the upper/lower blades bite, manually move the upper blade, when the two blades bite, adjust the gap between the end of the two blades to 0.1-0.2mm
