Pfaff 938 - Page 97

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Instruction Manual1
Table of Contents3
Contents4
Safety6
Regulations6
General Notes on Safety6
Safety Symbols7
Important Notes for the User7
Notes for Operating and Technical Staff8
Operating Staff8
Technical Staff8
Danger9
Proper Use10
Specifications11
Disposal of Machine12
Transportation, Packing and Storage13
Transportation to Customer's Premises13
Transportation Inside the Customer's Premises13
Disposal of Packing Materials13
Storage13
Explanation of Symbols14
Controls15
Main Switch15
Keys on the Machine Head (Only on Machines with Quick-Flange Motor)15
Pedal16
Lever for Raising Presser Foot16
Adjustment Lever for Zigzag Stitch and Needle Position17
Reverse-Feed Key17
Stitch Length Adjustment Wheel18
Adjustment Lever of the Underedge Trimmer -77118
Control Panel (Only on Machines with Quick-Flange Motor)19
Screen Displays19
Function Keys19
Installation and Commissioning21
Installation21
Adjusting the Table Height21
Mounting the Upper V-Belt Guard / Fitting the Machine Cover22
Fitting the Reel Stand22
Fitting the Quick-Flange Motor23
Fit the Belt Guard of the Quick Flange-Motor23
Connect the Plug-Type Connections and Earth Cable of the Quick-Flange Motor24
Commissioning25
Switching the Machine On/Off25
Basic Setting of the Machine Drive Unit (Only on Machines with Quick-Flange Motor)26
Mounting/Connecting the Start Inhibitor (Only on Machines with Quick-Flange Motor)28
Setting up29
Inserting the Needle29
Winding the Bobbin Thread; Adjusting the Primary Thread Tension30
Removing/Inserting the Bobbin Case31
Threading the Bobbin Case, Adjusting the Thread Tension31
PFAFF 938 Without Thread Trimmer31
PFAFF 938 with Thread Trimmer32
Pfaff 91832
Threading the Needle Thread / Adjusting the Needle Thread Tension33
Setting the Zigzag Stitch and the Stitch Position34
Adjusting the Stitch Length34
Entering the Start and End Backtacks35
Sewing36
Darning Program37
Counted Seam37
Error Messages38
Care and Maintenance39
Cleaning39
Lubricating the Hook40
Oiling the Zigzag Drive41
Cleaning the Air Filter of the Air-Filter / Lubricator42
Checking/Adjusting the Air Pressure42
Adjustment43
Notes on Adjustment43
Tools, Gauges and Other Accessories for Adjusting43
Abbreviations43
Check and Adjustment Aid44
Adjusting the Basic Machine45
Balancing Weight45
Centering the Needle in the Needle Hole (in Sewing Direction)46
Parallel Guiding of the Needle Bar47
Locking Lever48
Zero Stitch and Zigzag Stitch Scale49
Centering the Needle in the Needle Hole (Crosswise to Sewing Direction)50
Zigzag Stitch Width51
Zigzag Stitch Movement52
Needle Penetration Symmetry (Left, Centre and Right)53
Needle Position Adjustment Lever54
Zero Position of the Bottom Feed Dog (with Closed Gear Box)55
Zeroing the Bottom Feed (with Open Gearbox)56
Feeding Motion of the Bottom Feed Dog57
Lifting Motion of the Bottom Feed Dog58
Drive Belt in the Gearbox Housing59
Hook Bearing Bracket60
Hook Lubrication61
Pre-Adjusting the Needle Height62
Needle Rise, Hook-To-Needle Clearance and Bobbin Case Positioning-Finger63
Final Adjustment of the Needle Height64
Bobbin Case Opener Position65
Bobbin Case Opener Motion66
Bottom Feed Dog Height67
Presser Foot to Needle Plate Clearance68
Needle Thread Tension Release (on Machines Without -900/24)69
Presser Foot Pressure70
Thread Diverter Pin71
Limiting the Knee Lever Stroke72
Knee Lever Play73
Bobbin Winder74
Adjusting the Underedge Trimmer -771/0475
Resting Position of the Knife75
Knife Height76
Positioning of the Knife77
Knife Drive Switch78
Workpiece Guard79
Adjusting the Thread Trimmer -900/2480
Axial Position of the Control Cam80
Preliminary Adjustment of the Control Cam81
Position of the Thread Catcher and Cutting Test82
Readjustment of the Control Cam83
Needle Thread Tension Release84
Parameter Settings85
Selecting the User Level85
Example of a Parameter Input86
List of Parameters87
Reset / Cold Start88
Explanation of the Error Signals89
Internet Update of the Machine Software90
Wearing Parts91
Circuit Diagrams93

Pfaff 938 - Page 97

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