Check Spring Stroke; Pre-Tension Dial - Janome HD9 Service Manual

q
B
r
e
w
q
11 to 15 mm
w
r
4 mm

11. Check Spring Stroke

The amount of the needle thread supplied by the check
spring should be 11 to 15 mm.
z
A
x
NOTE:
There should be no slack in the thread.
c
v
b
• If the length is too long, turn the guide in the direction A.
• If the length is too short, turn the guide in the direction B.
n
t

12. Pre-tension Dial

The standard position of the pre-tension dial is as follows:
q
The screw head q sinks 4 mm below the dial face.
9
Thread the machine up to the thread guide q and
lower the presser foot.
Lower the needle bar to the lowest position.
Hold the thread end and mark the point w on the
thread beside the thread guide.
Pull the thread gently to the left until it stops (the
check spring e went full stroke).
Measure the length of thread drawn out.
Loosen the setscrew r and move the tension dial
guide t to adjust the stroke.
Tighten the setscrew r.