Adjustment of feed dog height and maximum stitch length of lockstitch machine (double needle)

The standard height of the feed dog is 0.8mm from the plane of the needle board; Adjustment of the height of the feed dog: Loosen the tooth fixing screw on the feed dog seat to adjust; Adjusted phenomenon: It is lower than the standard height, which can prevent the cloth Wrinkling, if it is too low, uneven stitch length is likely to occur; if the maximum stitch length is not the predetermined length, move the cloth feeding limit plate set under the bottom plate of the machine head to adjust; adjustment method: positive feeding amount adjustment: loosen The screw moves the limit plate upward (increase) or down (decrease) to adjust; reverse feed amount adjustment: loosen the fixing nut, and screw the adjustment screw in (increase) or out (decrease) to adjust.