4-2 CHANGING UPPER , LOWER KNIFE :
7
4
3
6
1
2
5
8
9
8
CHANGING UPPER KNIFE:
A . LOOSEN SCREW (1) PUSH LOWER
KNIFE HOLDER (2) TO LEFT , THEN ,
TIGHTEN SCREW (1) LIGHTY .
B . TAKE OFF SCREW (3) CHANGE NEW
UPPER KNIFE (4) . THEN , TIGHTEN
SCREW (3) LIGHTLY .
C . LOOSEN SCREW (1) MAKE SURE
LOWER KNIFE (8) TOUCH UPPER
KNIFE CLOSELY .
D . TURNING HAND WHEEL TILL UPPER
KNIFE CLAMP REACH ITS LOWEST
POSITION . THEN , ADJUSTING THE
POSITION OF UPPER KNIFE IN ORDER
TO MAKE SURE UPPER KNIFE AND
LOWER KNIFE OVERLAP BY 0.5 mm .
E . TIGHTEN SCREW (3) , (1) .
D . LOOSEN SCREW (1) MAKE SURE
SCREW (1) .
(4) CLOSELY . THEN , TIGHEN
LOWER KNIFE TOUCH UPPER KNIFE
SCREW (9) .
KNIFE LINE EVEN WITH THE TOP OF
C . MAKE SURE THE TIP OF LOWER
LOWER KINFE (8) AND CHANGE NEW
B . LOOSEN SCREW (9) TAKE OFF OLD
TIGHTEN SCREW (1) LIGHTY .
KNIFE HOLDER (2) TO LEFT , THEN ,
A . LOOSEN SCREW (1) PUSH LOWER
NEEDLE PLATE . THEN , TIHGTEN
LOWER KNIFE .
CHANGING LOWER KNIFE
KNIFE TIP
NEEDLE
PLATE
UPPER AND LOWER
KNIFE OVERLAP
AMOUNT 0.5 mm
TOP OF NEEDLE PLATE
DIAGRAM 1
