Installing The Ss Lever Unit; Adjusting The Ss Lever Unit - JUKI MF-7900 Instruction Manual

VII. INSTALLING THE SS LEVER UNIT
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.

1. Installing the SS lever unit

❶
1) Install SS lever unit ❹ using SS lever unit setscrews 1 ❶ , SS lever unit setscrews 2 ❷ and SS lever unit
washers ❸ supplied as accessories.
Temporarily tighten SS lever unit setscrews 2 ❷ at the center position of the slot and securely tight-
*
en the setscrews after performing the trial sewing and adjusting the stitch pitch of the short stitch.
In addition, install the SS cover after finishing the work of securely tightening of the setscrews.
Refer to "2. Adjusting the SS lever unit" p.8

2. Adjusting the SS lever unit

WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest. In addition, cut the air
supply from air compressor.
1) Loosen setscrews ❷ in SS lever ❶ , move the lever up and down to adjust the position, and the stitch pitch
of the short stitch can be adjusted.
* Commendable stitch pitch is 1.4 mm. (The center position of the slot of SS lever is the standard.)
Turn SS lever ❶ in the direction of A to increase the stitch pitch, and turn it in the direction of B to decrease
the stitch pitch.
2) When the adjustment is completed, install SS cover ❹ using setscrew ❸ supplied as accessories. Setscrew ❺ has to
be tightened together with the pitch scale plate.
❷
B
A
❶
❸
❷
❹
for how to adjust and install the SS lever unit.
– 8 –
❸
❺
❹