Adjustment; Main Unit Of Sewing Machine; Needle Entry; Height Of The Presser Bar And The Position Of The Presser Foot - ELNA E9020 Service Manual

[5] Adjustment

1. Main unit of sewing machine

(1) Needle entry

Specify the straight stitching. (Bring
the needle to the left stitch base
line.) Loosen 1 and turn 2 to
adjust.
• If the needle entry point shifts a
little to the left from the center of
the groove on the plate, hitched
stitches will be produced. So, do
not allow the needle to shift to the
left from the center of the groove.
(Fig. 1)
• Select the pattern shown in (Fig.
2). In this case, the needle should
not come in contact with the throat
plate when when it throws to the
rightmost end of its stroke.

(2) Height of the presser bar and the position of the presser foot

[Height of the presser bar]
Loosen screw 1 and move the presser bar up or down to adjust so that a
clearance of 6.3 ± 0.2 mm is provided between the throat plate and the
presser foot when the presser bar lifting lever is raised.
(Note) • Do not make a scratch on the rack with the hexagon wrench
key.
• After the aforementioned adjustment, the material thickness
shoud be adjusted (see "service mode P-42, W).
• If the presser bar fails to smoothly go up and come down, pressure of
the presser foot applied to the material will will be reduced. As a result,
the specified feed amount cannot be obtained. Furthermore, the material
thickness cannot be detected, resulting in defective thread tension.
[Position of the presser foot]
The presser foot should be positioned in parallel to the feed dog and also
the slot in the presser foot should be almost aligned with the slot in the
throat plate.
• If the slot in the presser foot is not aligned with the slot in the throat plate,
the material will not be securely clamped. In this case, the material will
enter the slot in the throat plate when the needle penetrates the material.
(Defective feed of material : A cause of stitch skipping, hitched stitches,
etc.)
How to adjust
Groove on the plate
3.5 3.5
Straight
stitching
Center
Left
Fig. 1
How to adjust
0.05 to 0.35
Disassembly
A through E on page 15
Use service
mode H to select
the pattern.
Location of components to be adjusted
Pattern
selection
Right
Fig 2
Disassembly
H on page 16
Location of components to be adjusted
6.3 ± 0.2 mm
0.2 to 0.5
17
Adjustment drawing
2
1
Initial state
Adjustment drawing
1
2.5 mm
hexagon
wrench key