Sewing machine with one or more sewing on sewing material to form one or more stitches, sewing materials to make one or more layers of interwoven or stitched up the machine. But the sewing machine for a long time, there will be some failures, take a look on the sewing machine Common Failures and below.
1. Failure characteristics: seam wrinkling.
Products reason: the needle tip off the thread tension is too large, the differential mechanism to adjust properly.
Solution: Replace the new needle, bobbin spring Loosen the screws, readjust the differential mechanism.
2, fault characteristics: sewing material below is "eating broken" form grid indentation.
Products reason: too sharp pointed teeth feed, presser foot pressure too.
Treatment: Available Whetstone grinding sharp teeth, unscrew the regulator screw.
3, fault features: sewing materials chug sound interrupted fiber cable beneath hair sewing.
Product Reason: broken needle tip or too blunt.
Solution: Replace the needle.
4, fault characteristics: sewing material stagnation.
Products reason: feed dog too low, presser foot pressure is too great.
Treatment: raise the feed dog, tighten the screws regulator.
5, fault characteristics: sewing materials go back and forth.
Products reason: feed dog too.
Solution: Adjust the feed dog.
6, fault features: seam was not sewn back.
Products reason: feed cam shift.
Solution: Adjust the feed position of the cam.
7, fault characteristics: sewing material irregularly move diagonally.
Products reason: the feed dogs feed dogs mounted crooked or loose screws.
Treatment: Correction feed dog and tighten the screws.
Fault trace aspect
1. Failure characteristics: surface line was floating shape.
Products Cause: gripper pressure is too small.
Treatment: screwed clamp, thread tension increases.
2, fault feature: the bottom line was a floating state.
Product Reason: bobbin spring too loose.
Treatment: Tighten the screws bobbin spring, increasing the thread tension.
3, fault features: long-short needle length.
Products Cause: The presser foot pressure is too small.
Treatment: Tighten the regulator screw.
4, fault characteristics: sewing needle has a line feed each of the following sets of towels were line appears sleeve.
Products reason: feed and thread take action or not, Fast-forward action.
Solution: Adjust the feed cam screw, so the thread feed and harmonized the action
Terms of trouble-free operation
1. Failure characteristics: head rotation stagnate.
Product Reason: mistake of oil, especially the vegetable filling. Too much dirt inside spindle bed, connecting rod screws, and replace the screws too tight cone.
Treatment: Rinse with kerosene, machine oil refill. Cleaning spindle bed, loosen the screw, to guarantee a certain gap.
2, fault feature: when to send transfer, stagnate semi-circle, half-circle of light slip or stagnate for each revolution has a point. Intrafusal bed round cable head during the operation not only half-circle stagnate and accompanied by severe jitter and noise.
Products reason: the high feed tooth position or the accumulation of dirt and Chifeng, so the rising feed dog and the needle plate.
Processing Method: Clean spindle bed, and raise a little sewing machine oil. Clean or lower the feed dogs. Replace or alignment of the needle bar.
3, fault characteristics: nose was stuck unable to move.
Products reason: feed dog position too far forward or too far back, hitting the needle plate. Needle bar installation position is too high, the needle clamp touch the cabinet.
Solution: Adjust the feed dog position, the re-pin, adjust the needle bar height.
4, fault features: noise from the needle body.
Products reason: the needle bar, the needle bar sets, small connecting rod wear send moving too large. Small needle bar crank rod screw loose screws.
Solution: Replace with new parts and tighten.
5, fault features: noise from the feed mechanism.
Products reason: big cone steeple worn or loose screws, feed dog touch the needle plate, pitch adjustment mechanism loose.
Approach: grinding or re-adjustment, readjust, re-adjust or tighten the screw.
6, fault features: noise from the shuttle mechanism.
Product Reason: shuttle and shuttle bed wear resulting gap, shuttle and put Sotho a gap too large an impact.
Solution: Replace with new parts, adjust or replace with new parts.
7, fault characteristics: general noise.
Products reason: the shaft, lower shaft and bushing wear, resulting in generation ran up and down, the machine starvation.
Solution: Replace with new parts, or adjust the gap between the upper and lower axis of the plane, pay attention to maintenance, refueling time.
Needle
1. Failure characteristics: thick material sewing needle.
Products reason: too thin or curved needle, sewing material thickness is uneven, the needle bar ran too large.
Treatment: Cuzhen ones, slow to adapt and hand sewing speed to help feed, renewal needle bar or needle bar sets.
2, fault characteristics: short pitch constantly needle, needle gauge length.
Products reason: feed dog operation delay, the feed dog failed, the needle hit the rear end of the feed dog and needle.
Approach: should adjust the positioning cam feed, appropriate to shorten the pitch or replace the feed dogs.
3, fault features: broken needle in the needle plate.
Product Reason: needle low position, the needle hit shuttle, shuttle bed not installed, touch the tip of the needle shuttle, Sotho and put the needle end both sides gap is too small or too big, put a needle or lose touch Sotho needle guard role.
Solution: adjust the needle bar or needle position, replace the shuttle, and adjust the pendulum Sotho needle end clearance.
4, fault characteristics: needle off the top of the needle plate.
Products reason: too much hand sewing materials, resulting in a curved needle, presser foot screw loose, causing the needle to touch the presser foot askew, feed cam displacement resulting pull off the needle sewing materials, sewing compound with a hard object so that the needle touch off.
Treatment: strengthening exercises, tone and tighten the screws positive pressure foot, adjust the position of the feed cam screw.
Disconnection
1. Failure characteristics: first needle broken, broken head was cut shape.
Products reason: anti-loaded needle or needles are not equipped enough, resulting in the needle too low. Sewing material more rigid, partial small needle or presser foot pressure is too great.
Treatment: installation and inspection machine needle needle bar connecting shaft screw is loose. Replacing the needle and adjust the presser foot pressure.
2, fault characteristics: both ends of the suture breakage was curled, and with short hair.
Products reason: too tight or cramping occurs when sewing stitches mix around. Suture is placed to squeeze shuttle shuttle guide groove bed. Crisp easy to tie sutures rot, poor quality, over the line has burrs.
Solution: replace clip-ray pressure and checked the wound wire line exclude mix. Check taker for wear and, if necessary, replace the shuttle. Sanding over the line parts, replace sutures.
3, fault characteristics: the lower part of the plot line of heavy sewing materials, but can not form a stitch break, break head horsetail shape.
Products reason: feed dog too low, sewing material to a halt off the plot lines too much. Substandard pace and line feed are tied off. Presser foot, needle loose, sewing materials hinder operation.
Treatment: raise the feed dog, adjust the feed cam positioning angle, tightening the presser foot and the needle screw.
4, fault characteristics: sewing suddenly disconnected, face lines are curved shape fluctuations.
Products reason: the shuttle bed position not installed noodles shuttle rolled into bed. At the end of the bobbin case lock or sewing suddenly shifted. Taker poor quality bobbin casings spring is too long or oval.
Approach: re-adjust the shuttle bed position, reinstall the shuttle, shuttle changing mind sets.
5, fault characteristics: Sewing suddenly off the bottom line. Bobbin case failed, the inner diameter of the elliptical.
Product Reason: bobbin case failed, diameter elliptical, resulting in the bobbin rotational failure. Bobbin spring screws tighten skin pressure is too small to make the shuttle. Bobbin winding messy overfill or too loose. The bottom line rot crisp with knot, so the heart can not end bobbin spring.
Solution: Replace the bobbin case, loosen the screw spring bobbins, bobbin thread rewind, change the bottom line.
Jumper
1. Failure characteristics: Primer is not on the bottom line.
Products reason: the shuttle cord is too short, shuttle clip in the shuttle door, the needle is too high, you can not hook the wire loop shuttle.
Treatment: elongated shuttle line, check whether the bottom line is stuck, and exclude it. Needle bar connecting shaft sturdy screw loose needle bar move, should lower the needle bar, needle again, tighten the captive screw.
2, fault characteristics: needle bar ran.
Product Reason: needle bar hole, the needle bar wear, the needle bar connection screw loose tie, the needle rod displacement.
Solution: replace the needle bar set, or the optional new needle bar, re-pin; and tighten the screws.
3, fault characteristics: a jump over several needle sewing.
Product Reason: shuttle wear, shuttle sharp blunt, the needle is too high or too low.
Approach: for shuttle, adjust the needle bar height or needle height, re-pin.
4, fault features: continuous jumper or a needle can not sew.
Products reason: poor quality needle or needle bending does not normally produce loops. Needle is too high, hook live loops, three sewing machine needle suture material mismatch. Long-term use shuttle, swing beds and other parts badly worn or fold.
Solution: replace qualified needle or needle alignment. Adjust the height of the needle bar or needle. Under normal circumstances can replace the shuttle or shuttle bed, for a major overhaul if necessary.
5, fault features: thin seam no jumper, jumper thick seam.
Products Cause: The presser foot pressure is not enough, the needle is too thin, hook line agencies and other parts badly worn.
Solution: Adjust the presser foot pressure, needle replacement, replacement parts, repair.
6, fault characteristics: thick seam jumper, jumper thin seam.
Products reason: the capacity of the pinhole needle plate wear too much, too thick needle, pressure foot bottom wear, or the presser foot pressure is too small.
Solution: Replace the needle plate, needle exchange, for the presser foot, change the presser foot, or to adjust the presser foot pressure.
