Installing The Knife; Checking The Sewing Machine In The Delivered State - JUKI LBH-1790AN Instruction Manual

7. Installing the knife

WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the fol-
lowing work after turning the power off and ascertaining that the motor is at rest.
❷
❶
Inch → mm CONVERSION TABLE
Knife size
1/4
3/8
7/16
1/2
9/16
5/8
11/16
3/4
13/16
7/8
1
1 1/8
1 1/4
1 3/8
1 1/2

8. Checking the sewing machine in the delivered state

When replacing the knife with a new one, perform as
follows.
1) Knife ❶ can be easily removed together with the
2) Lower the knife bar by hand. Now, push the knife
1 to 2 mm
When the cloth cutting knife you have is indicated in
Indication of mm
inch, set the cloth cutting length (knife size) in mm
6.40
using the inch
9.50
13. Sewing data list"
11.10
12.70
14.30
15.90
17.50
19.10
20.60
22.20
25.40
28.60
31.80
34.90
38.10
– 19 –
washer when removing knife retaining screw ❷ .
bar down so that the knife goes below the top
surface of the throat plate by 1 to 2 mm, as illus-
trated in the figure. In this state, place the wash-
er and tighten the setscrew.
→ mm conversion table. (Refer to
p.37.)
If the work clamp foot is the lifted state
before turning the power ON, lower it
firstly and turn ON the power to the
sewing machine.
When lowering the work clamp, take
care not to place your hands near the
knife.
If the power is turned ON with the work
clamp raised and the ready key is
pressed, "E998 Work clamp deviation
error" can occur.
"V-