Yao Han F300A & F302A Operators Manual

ADJUSTMENTS The presser foot Is set at the factory to accommodate most typical bag types. It should not have to be adjusted for bag types. If the force on the presser foot needs to be changed, proceed through the followlng steps: l. Disconnect the machine from the power supply and place on a workbench. 2. Remove the looper cover. (Flg.15) 3. The spring around the presser foot bar provides the force exerted by the presser foot. The presser foot lifter assembly Is used to set the spring at a specified compression with the holder. 4. At the factory the holder is set at 1/4 Inch (6.4mm) to the frame as seen In Fig.31. 5. Loosen the screw [G) and move the holder. Compressing the spring wlll Increase the force. 6. Tighten the screw and check the force of the presser foot. 7. Attach the looper cover to the machine. 8. Plug In the machine and test It on a bag sample. 5.10 THROAT PLATE MAINTENANCE Keep the throat plate clean for smooth bag flow through the machine. Routinely check the three fasteners to be sure they are tight. Check the teeth on the top face of the plate. Generally, the throat plate should be replaced if the teeth feel worn to the touch.

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¼ INCH 1(6,4MM)

Flg.31

19 From the Library of Superior Sewing Machine & Supply LLC