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< p > < strong > 1, fault characteristic < /strong >: when sending, the half circle is stagnant, half circle is light or slippery, or there is a stagnation point in every round.

The spindle of the shuttle bed is not only half circle but also accompanied by violent jitter and noise when the thread is running.

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< p > Product: the position of the feeding tooth is high or the dirt is accumulated inside the teeth, which makes the delivery teeth touch up with the needle plate when it rises.

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< p > processing method: clean shuttle bed and add a little sewing machine oil.

Cleaning or lowering the delivery teeth.

Replace or straighten the needle bar.

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< p > < strong > 2, fault feature: the head rotates stagnated.

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< p > Product: wrong lubricant, especially vegetable oil.

There are too many dirt in the shuttle bed, and the connecting rod screws and the garden cone screws are too tight.

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< p > processing method: after washing with kerosene, reassemble the sewing machine oil.

Clean the shuttle bed and loose the screws to ensure a certain gap.

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< p > < strong > 3, fault feature: the nose is jammed and can not move.

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< p > Product: the position of the feeding tooth is too close or too close to the needle plate.

The needle bar installation position is too high, the needle clip touches the shell.

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< p > treatment: adjust the position of the feeding tooth, re adjust the needle and adjust the height of the needle bar.

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< p > < strong > 4, fault feature: noise comes from needle mechanism.

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< p > Product reason: needle bar, needle bar sleeve, small connecting rod and so on, the wear is too large.

Small connecting rod screw rod crank screw loose.

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< p > processing method: replace new parts and tighten them.

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< p > < strong > 5, fault feature: noise comes from feeding mechanism.

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< p > Product reasons: large cone garden screws wear or loose, send cloth teeth touch needle plate, needle distance adjustment mechanism loose.

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< p > processing method: grinding or readjustment, readjusting, readjusting or tightening screws.

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< p > < strong > 6, fault feature: general noise.

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< p > Product reason: the upper shaft, the lower shaft and the axle sleeve wear, causing the movement up and down, and the machine is short of oil.

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< p > processing method: replace new parts, or adjust the gap between upper and lower shaft planes, pay attention to maintenance and fill time.

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< p > < strong > 7, fault feature: noise comes from swing mechanism.

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< p > Product cause: the shuttle and shuttle bed wear cause large clearance, and the clearance between swing shuttle and pendulum is too large, resulting in impact.

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< p > processing method: replace new parts, adjust or replace new ones.

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