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438 Series
Pfaff 438 Series User Manual
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9
Setting:
Adjustment:
9.1
.2
.3
Adjusting
the
stitch
length
scale
ring
When
the
stitch
iength
is
set
at
"0"
the
"0"
mark
on
scale
ring
3
must
be
in
line
with
graduation
mark
4.
Turn
miiied
wheel
1
as
far
as
it
will
go
in
the
direction
in
which
the
reverse-feed
control
moves
downwards.
Loosen
screw
2
and
turn
scale
ring
3
so
that
the
figure
"0"
is
in
line
with
graduation
mark
4.
In
this
position
tighten
screw
2.
17
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
18
20
Table of Contents
Table of Contents
2
Preparations for Adjusting
4
Centring the Needle in the Needle Hole (in Sewing Direction)
7
Setting the Stabilizing Rod Parallel to the Needle Bar
8
Stitch Width Control
10
Zeroing the Needle for Straight Stitching
10
Stitch Width Scale
11
Limiting the Maximum Stitch Width
12
Adjustung the Locking Lever
13
Adjusting the Needle Inthe Needle Hole (Sideways)
14
Adjusting the Needle Throw
15
Needle Position "Left, Centre, Right
16
Adjusting the Needle Position Lever
18
Adjusting the Stitch Length Scale Ring
19
Adjustment with Closed Gearcase
20
Zeroing the Bottom Feed
20
Adjustment with Open Gearcase
21
Adjusting the Bottom Feed Driving Motion
22
Bottom Feed Lifting Motion 21+22
23
Tensloning the Driving Belt in the Gearcase
25
Adjusting the Hook Bearing Bracket
26
Preliminary Adjustment of Needle Bar Height
27
Oil Distributor Ring
28
Hook Timing and Hook-To-Needle Clearance
29
Final Adjustment of Needle Bar Height
30
Bobbin Case Opener
31
Position of Bobbin Case Opener 29+30
31
Timing the Bobbin Case Opener
33
Adjusting the Slack Thread Control
34
Clearance between Presser Foot and Needle
35
Feed Dog Height 34+35
36
Oil Check Valve
38
Tension Release Mechanism 37+38
39
Lubrication of Zigzag Eccentric
41
Hook Lubrication
42
Knee Lever Stroke Limitation
43
Knee Lever Play
44
Bobbin Winder
45
Presser Foot Pressure
46
Thread Check Spring and Thread Regulator
46
Annex for Machines Equipped with Zigzag Control -716
47
Needle Vibration
47
Left, Center and Right Needle Positions 46+47
48
Needle Position Lever 48+49
50
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Pfaff 438 Series Specifications
General
Brand
Pfaff
Model
438 Series
Category
Sewing Machine
Language
English
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