Check Spring Stroke; Pretension Dial - Janome 1600P Servicing Manual

(1)
B
(4)
(3)
(2)
(1)
11 - 15 mm
(2)
(4)
4 mm
1600P and 1600P-DBX
1600P-DB

11. Check Spring Stroke

The amount of the needle thread supplied by the check
spring should be 11 - 15 mm.
[1] Thread the machine up to the thread guide (1) and
A
[2] Hold the thread end and mark the point (2) on the
NOTE:
There should be no slack in the thread.
[3] Pull the thread gently to the left until it stops {the
[4] Measure the length of thread drawn out.
[5] Loosen the setscrew (4) and move the tension dial
(5)
[6] Tighten the setscrew (4).
15 mm
11 mm
12. Pre-tension Dial
The standard position of the pretension dial is as follows:
(1)
1600P and 1600P-DBX:
The screw head (1) sinks 4 mm below the dial face.
(Use the marking on the Gauge 767G-001 for 4 mm).
1600P-DB:
The screw head (1) is level with the dial face.
Level
9
lower the presser foot.
Lower the needle bar to the lowest position.
thread beside the thread guide.
check spring (3) travels full stroke}.
(Use the markings on the Gauge 767G-001 for 11 mm
and 15 mm).
guide (5) to adjust the stroke.
- If the length is too long, turn the guide in the direc-
tion A.
- If the length is too short, turn the guide in the direc-
tion B.
4 mm