When picking, see if the machine head is bright, whether there is paint stripping and bumping, whether the plating layer of the needle board, push plate, panel, upper wheel, etc.
1. Adjust the height of the presser foot. 2. Adjust the interval between the presser foot and the needle. 3. Adjust the position of the feed foot of the presser foot. 4. Adjust the position of the needle bar.
Preparation before sewing machine： 1. Wipe all parts of the machine clean first, and check whether the fastening parts between the parts are loose. 2. Check whether the oil L is unobstructed and lubricate according to the lubrication requirements.
Preparation and adjustment work should be carried out under the guidance of the mechanic. After the completion, the sewing operation can be performed. 1. Pay attention to the correct sitting posture. 2. Pay attention to the method of controlling the pedal and presser foot of the motor.