1、 Sewing machine float - the seam on the part is too loose on the surface
1. Tighten the clamp nut
2. Tighten the take-up spring.
2、 Sewing machine needle skipping - stitches on clothing are continuous
1. Fine adjust the adjusting screw on the lifting joint to make the bottom surface of the triangle in the circle contact the pin to yield.
2. Adjust the screw on the big needle so that it is close to the bottom of the V-shaped groove of the clothes drying needle when entering the clothes drying needle.
3. Adjust the pin bracket so that the pin contacts the bearing, but too tight.
4. Slightly adjust the relative direction of the two groove cams to make the big needle penetrate the middle of the coil on the circular triangle slightly upward. When crocheting, the circular triangle should be in the middle of the yield plane of the large needle.
3、 Thread breaking of sewing machine
1. Loosen the fixing nut moderately use only one fixing clamp.
2. Loosen the thread take-up spring.
3. Adjust the screw on the needle arm so as to avoid large needle sticking to the clothes drying needle.
4. Adjust the nut on the rocker arm connecting rod so that the middle of the V-shaped groove of the pin is aligned with the clothes clamp.
5. Slightly adjust (rotate) the direction of the small cam to keep the needle tip of the suture needle in sync with the V-shaped groove of the clothes dryer.
4、 The space of the sewing machine does form a circle
1. Carefully adjust the upper adjusting screw of the lifting joint the stop screw on the big needle to make the triangle direction of the big needle correct.
2. Adjust the direction of bending plate. The bottom of the square hole should be flush with the middle of the drying clamp, the large needle should pass through the middle of the square hole.
3. Fine adjust the relative direction of the left right sides of the slot cam to make the big needle penetrate vertically slightly above the middle of the triangle. The triangular hook line in the ring should be in the middle of the yield plane of the pin.
5、 Wavy seam of sewing machine -- the seam on the garment piece is unclear drifted up down
1. The same row (row) of clothes should be put into the clothes hanging needle.
2. Carefully proofread the clothes hanging needle to ensure that the height of the needle is uniform.
3. Replace the deformed needle (note that the tail of the new needle should expose about 1.5mm of the end face of the needle seat, ensure that the needle enters the V-groove bottom of the needle)