1. Sudden stop in sewing; power indicator lights on, but the hand wheel is heavy.

 

Reasons: Computer needle car works at low speed for a long time; overheating of machine may cause automatic shutdown of motor power supply.

 

Method: Turn off the power supply and wait for 20 minutes. The safety device will be restarted and the sewing machine is ready to start working.

 

2. No needling

 

Reasons: Surface line is used up; Pressure foot is not lowered; Shuttle axis is not in the correct position.

 

Solution: Replace the empty line axle, recognise the needle; lower the foot; press the shuttle axle to the bottom and return to the left; lower the eyebutton rod.

 

3. Computer Needle Car Stops

 

Reasons: Press foot mismatch or machine needle bump into press foot; machine needle drops off and gets stuck in crochet.

 

Solution: Replace press foot; Remove machine needle and install new needle.

 

4. Surface line disconnection

 

 

Reasons: inappropriate threading mode; knotting; excessive thread tension; needle bending, blunt point or sand hole; needle size is not appropriate; needle placement is inappropriate; needle and thread matching is inappropriate; sewing initial speed is too fast; threading without thread taker.

 

Solution: Re-normal on-line; Eliminate on-line knotting; Adjust clamp pressure; Replace machine needle; Replace machine needle of appropriate size; Place machine needle properly; Change thread or needle; Start sewing machine at medium speed; Check on on-line steps.

 

5. Bottom line disconnection

 

Reasons: the shuttle core is not fully inserted into the shuttle shell; the shuttle core is wound by wires; the shuttle core is not running smoothly in the shuttle shell; the shuttle shell or shuttle has yarn.

 

Solution: Carefully reload the shuttle core into the shuttle shell; arrange the outlet of the shuttle shell; check that the shuttle core may be damaged; clean up the shuttle shell and the shuttle core.

 

6. Jumper

 

Reasons: excessive tension of thread; bending or blunting of machine needle; incorrect size of machine needle; improper matching of needle and thread; the thread has not passed through the take-up rod; insufficient pressure of pressing foot; improper placement of machine needle.

 

Solutions: adjusting the tension of the thread; replacing the needle; selecting the appropriate size needle; replacing the needle or thread; checking the threading steps; increasing the pressure of the foot; re-needling.

 

7. Unqualified trace

 

Reasons: the machine wire is not fully pulled into the sensor; the way of threading is not right; the shuttle shell is out of line wrong; the size of the shaft cap does not match.

 

Solution: fully pulling the machine wire into the sensor; correctly threading; correcting the shuttle shell outlet; changing to the size of the line shaft cap.

 

8. Chaotic Traces

 

 

Reasons: the machine needle size is not suitable; the step of on-line is wrong; the splint is relaxed; the cloth is stretched; the foot is not strong enough or completely relaxed; the shuttle core is deformed.

 

Solution: Select suitable needles for thread and cloth; Re-wire the machine; Up-tightening clamp; Delivery without strong pulling cloth; Up-tightening or re-loading pressing foot; Re-winding shuttle core.

 

9. Fabric wrinkling

 

Reasons: For specific fabrics, pins are too large; pins are passivated; thread tension is not appropriate; foot-pressing force is not enough; cloth is too light; the difference in surface, bottom line diameter or material is caused.

 

Solution: small pins; replacement of machine needles; adjustment of thread tension; increase foot pressure; use thin liner; surface and bottom lines are of the same diameter.

 

 

10, stranded wire

 

Reasons: Surface line and bottom line have not been pressed by foot; feeding teeth sink

 

Solution: The bottom line of the surface line is pressed on the foot at the same time; the feeding teeth are lifted.

 

 

11. Broken needle

 

Reasons: Fine needle sewing thick material; Insufficient installation of machine needle; Loosening of machine needle fastening Gong silk; Improper selection of press foot; Loosening of press foot.

Solution: changing suitable machine needle; reinstalling machine needle; tightening machine needle to fix Gong wire; selecting suitable press foot; reinstalling press foot.

 

12. The noise is too loud, the click and the machine run to death.

 

Reasons: sundries filling feeding teeth; yarn on the tip of shuttle; yarn winding shuttle.

 

Solution: Clean the machine; dismantle the machine and clean the shuttle.

 

13. Machine not feeding

 

Reasons: the length of pin is 0; the pin is too loose; the position of feeding teeth is too low; the fabric knots under the thread.

 

Solution: Re-set the appropriate pin pattern and length; adjust the pressure of the pin to "routine"; lift the feeding teeth; and place the two threads below the pin before sewing.

 

14. Can't thread machine needle; The threader doesn't move; The threading hook can't get into the needle eye.

 

Reasons: the needle is not in the highest position; the self-protection of the needle reader when the needle is not in place; the needle is not fully installed in place.

 

Solution: Rotate the handwheel until the needle reaches its highest position; insert the needle completely.

 

 

15. The threader does not return to its position and the sewing machine stops; the threading hook retains the needle eye.

 

Reason: Accidental action of sewing machine while thread-threading hook is still in the eye of needle.

 

Solution: Clockwise micro-operation of the handwheel and take out the hook.

 

Generally speaking, these sewing equipment failures often occur in the process of processing and production, so it is necessary to grasp these solutions, so that clothing machinery can operate normally.