(A)
(B)
(C)
(E)
(D)
(A)
(D)
X
Y
11–15 mm
(B)
104 72 63-26
19
Adjustment of thread check spring stroke
Requirement
The amount of the needle thread supplied by the check spring should be 11–15 mm.
Check
• Thread the machine up to the thread guide (A) and lower the presser foot.
• Lower the needle bar to the lowest position.
• Hold the thread end and mark the point (B) on the thread beside the thread guide.
NOTE: There should be no slack in the thread.
• Pull the thread gently to the left until it stops - the check spring (C) went full stroke.
• Measure the length of thread drawn out. The amount of the needle thread supplied by the check spring
should be 11–15 mm.
Adjustment
• Loosen the setscrew (D) and move the tension dial guide (E) to adjust the stroke.
• If the length is too long, turn the guide in the direction
X
.
• If the length is too short, turn the guide in the direction
Y
.
• Tighten the setscrew (D)
• Re-check