13
B. Lubricant Supply to Oil Fan
a) Fill lubricant up to “High”.
b) Use the oil for Sunstar industrial sewing machine or Shell’s Tellus C10 as lubricant.
c) When lubricant reaches “Low”, lubricant should be resupplied until it reaches “High”.
d) Exchange lubricant oil every two weeks.
[ Fig. 12 ]
Oil pump
Magnet
[ Fig. 13 ]
4-12. Inserting Bobbin into Bobbin Case
1) Insert the bobbin into the bobbin case as in the figure below.
※ If the bobbin is inserted in the opposite direction, it is spined loosely, causing entanglement of lower thread.
2) Insert the thread into the lower thread tension adjusting spring④ through the thread path③ and take out the thread
through the thread hole⑥.
3) Set the output tension to the extent that when the bobbin case① is dropped with the end of the thread held, it falls
gradually.
4) When the tension adjusting screw⑤ is turned clockwise, the lower thread tension gets stronger. When it is turned counter-
clockwise, the lower thread tension gets weaker.
[ Fig. 14 ]
Weaker
Stronger
⑤
⑥
④
③
②
①
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