ZOJE ZJ9700, Operation Manual

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13.3.Replace the counter knife and moving knife(Straight knife)
l.When the knife sharpness has deteriorated,
resharpen counter knife
① as illustrated in C,
and properly reinstall it.
1)If the mounting position of the counter knife
is moved in direction A form the standard
mounting position ,the thread length after
thread trimming will be increased accordingly .
2)If the mounting position is moved in
direction B,the thread length will be decreased
accordingly. A:Moving knife
B:Center of needle C:Standard:3 to 3.5mm
1)The standard height of the presser foot
lifted using the knee lifter is l0 mm.
2)You can adjust the presser foot lift up
to 13mm using knee lifter adjust screw
① .(The max.lift should be 9 mm for the
A type.)
3)When you have adjusted the presser
foot lift to over 10mm be sure that the
bottom end of needle bar
② in its lowest
posiyion does not hit presser foot
③
14.Adjusting the height of the knee lifter (Fig.19,Fig.20)