1. Whether poor contact or poor insulation of the control line leads to leakage. Check the connectors and junction boxes of the control circuit for poor insulation and wrap them with insulating tape.
2. The lead-in wire of sewing machine motor has poor insulation, and the motor winding leaks electricity to the ground. Use multimeter or shaking table to test the insulation resistance of motor to ground. Generally not less than 3 megohms.
Solution:
1, stop using it immediately to prevent electric leakage from hurting people;
2. Quickly check the causes of leakage, detect the power supply, control panel, motor and other parts of the computer sewing machine, find out the leakage device, and replace and maintain it in time;
3. Install protection devices such as leakage circuit breakers at the power input, so that the power supply can be cut off quickly when the machine leaks electricity, ensuring personal safety.
Matters needing attention in the use of sewing machine:
1, basic measures must be observed; ?
2, must undergo professional training, master the performance of sewing machine equipment;
3. Check all safety devices before use; ?
4. When loading needles, changing needles, pressing feet, needle plates, feeding teeth, bending needles, rotating shuttles or repairing, turn off the power immediately; ?
5. Turn off the power when leaving the sewing machine or workplace; ?
6. When using the clutch motor, wait until the motor stops completely; ?
7. Oil, lubricating oil and other liquids used in sewing machines and accessories should be cleaned immediately if they flow into eyes or come into contact with skin.