Contents
1. Brief introduction
2. Main specifications
3. Installation and preparation
3.1 Installation
3.1.1 Location of the machine
3.1.2 Installing drip pan
3.1.3 Installing machine head
3.1.4 Mounting rock shaft bracket of knee lifter
3.1.5 Installing motor
3.1.6 Connecting the clutch lever to the pedal
3.1.7 Installing the bobbin winder
3.1.8 Installing the thread unwinder
3.2 Preparation
3.2.1 Cleaning the machine
3.2.2 Examination
3.2.3 Lubrication
3.2.4 Trial run
4. Operation
4.1 Selection of the thread
4.2 Coordination between needle thread and sewing material
4.3 Installing the needle
4.4 Winding the bobbin thread
4.4.1 Winding method
4.4.2 Winding adjustment
4.5 Threading the needle thread and drawing the bobbin thread
4.6 Setting the bobbin
4.7 Installing the bobbin case
4.8 Setting stitch length and reverse sewing
5. Adjusting the thread tension
5.1 Adjusting the thread take-up spring
5.1.1 Adjusting the thread take-up spring tension
5.1.2 Adjusting the sewing range of thread take-up spring
5.2 Adjusting the thread guide
5.3 Adjusting the tension of needle thread and bobbin thread
6. Adjustment
6.1 Timing between needle and rotating hook motion
6.1.1 Adjusting the needle bar position
6.1.2 Adjusting rotating hook point timing with needle
6.1.3 Removing and installing the rotating hook
6.1.4 Adjusting the clearance between rotating hook and bobbin case holder position bracket
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