Needle-To-Hook Relationship; One-Touch Type Reverse Feed Stitching Mechanism - JUKI DDL-9000B Manual De Instrucciones

19. NEEDLE-TO-HOOK RELATIONSHIP

WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine.
Adjust the timing between the needle and the hook as follows :
1) Adjusting the needle bar height.
Turn the handwheel to bright the needle bar down to the lowest point of its stroke, and loosen setscrew 1 .
2) Adjusting the needle bar height.Align marker line (For a DB needle : marker line A , For a DA needle : marker line C ) on needle bar 2 with the bottom end
of needle bar lower bushing 3 , then tighten setscrew 1 .
3) Position the needle and the hook a .
Loosen the three hook setscrews, turn the handwheel in normal rotation and align marker line (For a DB needle : marker line B , For a DA needle : marker
line D ) on ascending needle bar 2 with the bottom end of needle bar lower bushing 3 .
4) In this state, align hook blade point 5 with the center of needle 4 . Provide a clearance of 0.04 mm to 0.1 mm (reference value) between the needle and
the hook, then securely tighten the three hook setscrews.
(Caution) If the clearance between the blade point of hook and the needle is smaller than the specified value, the blade point of hook will be
damaged. If the clearance is larger, stitch skipping will result.
• RP hook (dry hook) is used for the hook of DDL-9000B-DS type. When replacing, use the part No. described below. There are two kinds of Part
Nos. of the hooks classified by the regions.
22890206
22890404 (For Europe)
(Caution) Periodically clean RP hook (dry hook) since the hook rolls up thread waste or cloth waste and failure of the machine or defective sewing
may be caused.
(Caution) Because the needle bar 2 of DDL-9000B-MS and DS is black colored, sometimes it is hard to see the engraved lines. Make the working
area bright by bringing a light or by other method.

20. ONE-TOUCH TYPE REVERSE FEED STITCHING MECHANISM

The moment switch lever 1 is pressed, the machine performs reverse feed stitching.
The machine resumes normal feed stitching the moment the switch lever is released.
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the sewing machine.
[Adjusting the position of switch]
1) Loosen setscrew 2 and move the switch itself up and down to adjust the height.
2) Switch 1 can be used in two positions by turning it.
3) In addition, when you desire to lower the position of switch 1 , loosen setscrew 3 located in the back of the machine head and lower switch base 4 .
1
2
1
– 9 –
C
D
A
B
0.04 - 0.1 mm
4
5
a
4
3
A
B
2
3