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937
Pfaff 937 User Manual
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The reprinting, copying or translation of PFAFF Instruction Manuals, whether in whole or in
part, is only permitted with our previous permission and with written reference to the
source.
G.M. PFAFF
Aktiengesellschaft
Postfach 3020
D-67653 Kaiserslautern
Königstr. 154
D-67655 Kaiserslautern
Redaktion / Illustration
HAAS-Publikationen GmbH
D-53840 Troisdorf
This instruction manual is valid for all models and subclasses listed in the
chapter
"Specification"
.
1
3
Table of Contents
Table of Contents
3
Safety
6
Directives
6
General Notes on Safety
6
Safety Symbols
6
Important Points for the User
7
Operating and Specialist Personnel
7
Operating Personnel
7
Specialist Personnel
7
Danger
8
Proper Use
9
Specifications
10
Pfaff 937
10
Models and Subclasses
11
Needle and Thread
11
Disposal of Machine Waste
12
Transport Packaging and Storage
13
Transport to the Customer's Premises
13
Transport Within the Customer's Premises
13
Disposal of the Packaging
13
Storage
13
Explanation of the Symbols
14
Operational Controls
15
On/Off Switch
15
Knuckle Switch on Machine Head
15
Pedal
16
Presser Foot Lifter
16
Adjustment Lever for Zigzag Stitch and Needle Position
17
Reverse-Feed Key
17
Stitch-Length Adjustment Wheel
18
Adjustment Wheels for the Top Feed
18
Installation and Commissioning
19
Installation
19
Adjusting the Height of the Table Top
19
Tightening the V-Belt
20
Mounting the Upper V-Belt Guard
20
Fitting the Lower V-Belt Guard
21
Mounting the Reel Stand and the Sewing Lamp
21
Commissioning
22
Switching the Machine On/Off
22
Preparation
23
Inserting the Needle
23
Winding the Bobbin Thread, Adjusting the Thread Tension
24
Removing/Inserting the Bobbin Case
25
Threading the Bobbin Case, Adjusting the Thread Tension
25
PFAFF 937 Without Thread Trimmer -900
25
PFAFF 937 with Thread Trimmer -900
26
Threading the Needle Thread
27
Adjusting the Needle-Thread Tension
27
Adjusting the Zigzag Stitch and Needle Position
28
Adjusting the Stitch Length
28
Adjusting the Top Feed
29
Normal Sewing
29
Applying Fullness Constantly
30
Applying Fullness Intermittently
31
Constant Braking of the Top Fabric Ply (Stretching)
32
Braking the Top Fabric Ply or Intermittently Applying Fullness
33
Care and Maintenance
34
Cleaning
34
Lubricating the Hook
35
Lubricating the Zigzag Drive
36
Checking the Air Pressure
37
Emptying/Cleaning the Water Container of the Air Filter/Regulator
37
Adjustment
38
Notes on Adjusting
38
Tools, Gauges and Other Accessories
38
Abbreviations
38
Check and Adjustment Aid
39
Adjusting the Basic Machine
40
Balancing Weight
40
Centering the Needle in the Needle Hole (in Sewing Direction)
41
Parallel Guiding of the Needle Bar
42
Locking Lever
43
Zero Stitch and Zigzag Stitch Scale
44
Centering the Needle in the Needle Hole (Across Sewing-Direction)
45
Zigzag Stitch Width
46
Zigzag Stitch Motion
47
Needle Penetration Symmetry
48
Needle Position Adjustment Lever
49
Adjustment Wheels for Applying Fullness
50
Zeroing the Differentiation
51
Main-Stitch-Length Display
52
Zeroing the Bottom Feed (with Gearbox Housing Closed)
53
Zeroing the Bottom Feed (with Gearbox Housing Open)
54
Vibrating Presser Connecting Rod
55
Zeroing the Vibrating Presser
56
Torsion Spring of the Reverse Feed Lever
57
Torsion Spring of the Differentiation Regulating Shaft
58
Feeding Motion of the Bottom Feed Dog
59
Lifting Motion of the Bottom Feed Dog
60
Drive Belt in the Gearbox Housing
61
Hook Bearing Bracket
62
Hook Lubrication
63
Pre-Adjusting the Needle Height
64
Needle Rise, Hook-To-Needle Clearance and Bobbin Case Positioning-Finger
65
Final Adjustment of the Needle Height
66
Bobbin Case Opener Position
67
Bobbin Case Opener Motion
68
Bottom-Feed Dog Height
69
Clearance between Presser Foot and Needle Plate
70
Vibrating-Presser Feed and Connecting Lever
72
Vibrating-Presser Stroke
74
Vibrating-Presser Lifting Motion
75
Vibrating-Presser Feeding Motion
76
Feeding Motion Difference
77
Vibrating Presser and Presser Foot Pressure
78
Thread Diverter Pin
79
Needle-Thread Tension Release (Machines Without -900
80
Limiting the Knee Lever Stroke
81
Knee Lever Play
82
Bobbin Winder
83
Adjusting the Thread Trimmer -900/51
84
Pre-Adjusting the Control Cam
84
Roller Lever
85
Pawl
86
Engaging Solenoid
87
Release Lever
88
Engaging Lever
89
Thread Catcher Position and Cutting Test
90
Control Cam (Final Adjustment) and Retaining Spring
91
Needle-Thread Tension Release
92
Removing and Refitting the Control Unit
94
Synchronizer
95
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Pfaff 937 Specifications
General
Brand
Pfaff
Model
937
Category
Sewing Machine
Language
English
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