Pfaff 491 - Pressure of Roller Presser

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Adjustment

11 - 33

11.04.29 Pressure of roller presser

Requirement

The material must be fed smoothly. No pressure marks should be visible on the material.

Fig. 11 - 29

● Adjust roller presser pressure with screw 1 according to the requirement.

Main Page

Instruction Manual1
Table of Contents3
Safety6
Directives6
General Notes on Safety6
Safety Symbols7
Important Points for the User7
Operating and Specialist Personnel8
Operating Personnel8
Specialist Personnel8
Danger9
Proper Use10
Specifications11
Pfaff 471, 474, 49112
Needles and Threads12
Possible Models and Subclasses12
Disposal of Machine13
Transportation, Packing and Storage14
Transportation to Customer's Premises14
Transportation Inside the Customer's Premises14
Disposal of Packing Materials14
Storage14
Explanation of Symbols15
Controls16
On/Off Switch on Machines with Mini-Stop Motor16
- Without Edge Trimmer -72516
- And Edge Trimmer -72516
Button on Machine Head (Only on Machines with -91117
Pedal17
Lever for Lifting Roller Presser18
Knee Lever18
Key for Setting Stitch Length19
Swing out Roller Presser19
Edge Trimmer -725/04 for 47120
Edge Trimmer -725/04 for 474 and 49121
Edge Trimmer -726/05 for 49122
Installation and Commissioning23
Installation23
Adjusting the Table Height23
Fitting the Tilt Lock24
Tensioning the V-Belt (Does Not Apply to Machines with Mini-Stop Motor)24
Fitting the V-Belt Guard25
Fitting the Bottom V-Belt Guard (Does Not Apply to Machines with Mini-Stop Motor)25
Fitting the Synchronizer26
Fitting the Reel Stand26
Switching the Machine On/Off27
Commissioning27
Setting up28
Inserting the Needle on Model 471 and 49128
Inserting the Needle on Model 47429
Winding the Bobbin Thread; Adjusting the Primary Thread Tension30
Removing/Inserting the Bobbin Case31
Threading the Bobbin Case/Adjusting the Bobbin Thread Tension31
Threading the Needle Thread and Regulating Its Tension on Model 471/49132
Threading the Needle Thread and Regulating Its Tension on Model 47432
Setting the Stitch Length34
Care and Maintenance35
Cleaning35
Oiling the Hook36
Filling the Oil Reservoir of the Thread Lubrication Unit36
Lubricating the Bevel Gears37
Checking/Adjusting the Air Pressure38
Cleaning the Air Filter of the Air-Filter/Lubricator38
Adjustment39
Notes on Adjustment39
Tools, Gauges and Other Accessories39
Abbreviations39
Adjusting the Basic Machine40
Adjusting the Synchronizer40
Needle Position in Sewing Direction on the PFAFF 471 and 49141
Needle Position in Sewing Direction on the PFAFF 47442
Preliminary Adjustment of the Needle Height43
Needle Rise, Hook Clearance, Needle Height and Needle Guard on the PFAFF 47144
Needle Rise, Hook Clearance, Needle Height and Needle Guard on the PFAFF 47446
Needle Rise, Hook Clearance, Needle Height and Needle Guard on the PFAFF 49148
Needle Position Crosswise to Sewing Direction on the PFAFF 47150
Needle Position Crosswise to Sewing Direction on the PFAFF 47451
Needle Position Crosswise to Sewing Direction on the PFAFF 49152
Height of the Bobbin-Case Opener53
Bobbin-Case Opener Stroke54
Height of the Feed Wheel on the PFAFF 47155
Height of the Feed Wheel on the PFAFF 47455
Height of the Feed Wheel on the PFAFF 49156
Stitch Length Control Eccentric58
Stitch Length Scale Disk59
Shaft Crank to Feed Wheel Drive60
Shaft Crank to Roller Presser Drive61
Clearance between Roller Presser and Feed Wheel62
Roller Presser63
Stitch Length on Stitch Length Scale64
Synchronization of Roller Presser and Feed Wheel65
Retainer (Only on Model 474)66
Knee Lever67
- Needle Thread Tension Release68
- Thread Check Spring69
- Bobbin Winder70
- Pressure of Roller Presser71
- Re-Engage Safety Coupling72
  - Adjusting the Edge Trimmer -725/0473
- Knife Stroke on Model 47175
- Knife Stroke on Models 474 and 49176
- Cutting Stroke on Model 47177
- Cutting Stroke on Models 474 and 49178
- Knife Position79
  - Adjusting the Thread Trimmer -726/05 on Model 49180
- Position of the Knife to the Needle Plate80
- Knife Position Crosswise to Sewing Direciton81
- Knife Height82
- Cutting Stroke83
- Knife Stroke84
  - Adjusting the Thread Trimmer -900/5385
- Removing the Cutter85
- Control Cam with Respect to Bobbin Opener and Tripping Lever86
- Radial Position of the Tripping Lever87
- Engaging Solenoid88
- Cutter Drive Lever89
- Control Cams for Bobbin Opener and Cutter (Using Adjustment Gauge)90
- Radial Position of the Control Cam in Relation to the Bobbin Opener91
- Control Cam for Cutter (Adjustment Without Gauge)92
- Cutter Control Lever for the Control Cam of the Cutter93
- Cutter Return Lever94
- Cutter Return Control95
- Fitting the Cutter96
- Eccentric Sleeve97
- Cutter Driving Rod98
- Cutter Function Test99
  - Tension Release (Only on Machines with Thread Tension Control -906/10)101
    - Adjustment of Backtacking Mechanism -911102
Needle in Needle Hole (Only for PFAFF 471 and 491)102
Coupling for Roller Presser Drive103
Bevel Gears for Feed Wheel Drive (on the PFAFF 471 and 474)104
Bevel Gear Play (on the PFAFF 471 and 474)105
Bevel Gears for Feed Wheel Drive (on the PFAFF 491)106
Bevel Gear Play (on the PFAFF 491)107
- Parameter Settings for the Quick-Ministop Motor108

Pfaff 491 - Pressure of Roller Presser

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