Adjustment Of Clearance Between Needle And Rotary Hook - ELNA 7200 Service Manual

7200

ADJUSTMENT OF CLEARANCE BETWEEN NEEDLE AND ROTARY HOOK

THE CLEARANCE BETWEEN NEEDLE AND THE TIP OF THE ROTARY HOOK (J) SHOULD BE
BETWEEN –0.1 AND +0.05 MM
HEXAGONAL
SOCKET
SCREW (A)
NEEDLE BAR
SUPPORTER (B)
SETSCREW (E)
HOOK BASE
PLATE (H)
MASTER NEEDLE (I)
-0.10 — +0.05MM
CLEARANCES
MUST BE 0.15 mm
(D) OR MORE
(CLEARANCES
MUST BE EVEN)
HOLE OF NEEDLE
PLATE (C)
SETSCREW (G)
SETSCREW (F)
TIP OF HOOK (J)
[ADJUSTMENT I]
1.REMOVE THE FACE PLATE, AND ATTACH A
MASTER NEEDLE (I).
2. TURN THE POWER SWITCH ON.
3. SELECT THE STITCH PATTERN
ZIGZAG WIDTH AT "7".
4. REMOVE THE PRESSER FOOT, NEEDLE PLATE
AND BOBBIN HOLDER.
5. LOOSEN THE HEXAGONAL SOCKET SCREW (A)
AND ADJUST THE CLEARANCE BETWEEN THE
NEEDLE AND TIP OF ROTARY HOOK (J) BY
MOVING THE NEEDLE BAR SUPPORTER.
CHECK THE CLEARANCE (D) BETWEEN THE
NEEDLE AND THE EDGE OF NEEDLE PLATE HOLE.
IF THE CLEARANCE (D) IS LESS THAN 0.15 MM,
FOLLOW THE PROCEDURE BELOW
[ADJUSTMENT II].
[ADJUSTMENT II]
1. REMOVE THE MACHINE BASE (REFER TO
PAGE 2).
2. TURN THE POWER SWITCH ON, AND SELECT
THE STITCH PATTERN
WIDTH AT "7",
3. REMOVE THE PRESSER FOOT, NEEDLE PLATE
AND BOBBIN HOLDER.
4. LOOSEN THE SETSCREWS (E) AND (F).
LOOSEN THE SETSCREW (G) JUST ENOUGH TO
MOVE THE HOOK BASE PLATE (H).
5. TURN THE HANDWHEEL TOWARD YOU UNTIL
THE TIP OF HOOK COMES JUST BEHIND THE
MASTER NEEDLE.
ADJUST THE CLEARANCE BETWEEN THE
NEEDLE AND THE TIP OF THE ROTARY HOOK,
BY MOVING THE HOOK BASE PLATE UP OR
DOWN, TO WITHIN –0.1 TO +0.05 MM AT THE LEFT
AND RIGHT NEEDLE POSITIONS.
6. TIGHTEN THE SETSCREWS (E), (F) AND (G)
FIRMLY.
7. CHECK THE BACKLASH BETWEEN THE HOOK
DRIVE AND LOWER SHAFT GEARS.
REFER TO PAGE 13 FOR THE ADJUSTMENT.
8. ATTACH THE MACHINE BASE, BOBBIN HOLDER,
NEEDLE PLATE AND PRESSER FOOT.
12
AND SET THE
. SET THE ZIGZAG