14. ADJUSTING THE HEIGHT OF THE KNEE LIFTER(FIG.18,19)
1. Adjusting the position of the thread trimming cam.
If you run the handwheel of the machine, the needle bar goes from the bottom up to 5mm, then the thread trim-
ming solenoid ④ is pressed to impel the roller ball touches to the concave of the thread trimming cam ①, Then
use the position screw ② to tighten it in casual. And then replace the thread trimming solenoid ④, while loose the
screw ② to adjust the cam ①, the clearance of the end plane between the cam and thread trimming driving shaft
is 0.5mm.(Use the torion with 40Kgf·cm to tighten the position screw ②)
2. Adjusting the position of the counter knife and moving knife.
When the head of the thread trimming driving shaft ③ exceeds the cam, the mesh between the front place of the
counter knife ⑧ and the edge of the moving knife ⑦ is 0.2-0.5mm. If they are not meshed, moves the knife shaft
crack rod ⑥ before the thread trimming driving shaft exceeded the cam ①, the front plane of the counter knife ⑧
and the edge of the moving knife is meshed, then tighten the screw ⑤.
1. The standard height of the presser foot lifted
using the knee lifter is 10mm.
2. You can adjust the presser foot lift up to 13mm
using knee lifter adjust screw ①. (The max. lift sh-
ould be 9 mm for the A type.)
3. When you have adjusted the presser foot lift to
over 10 mm, be sure that the bottom end of needle
bar ② in its lowest position does not hit presser
foot ③.
Fig.18
Fig.19
①
②
③
6
28
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