Pfaff 491 User Manual

Index
Contents ..................................................................................Chapter - Page
11.04.26 Needle thread tension release .......................................................................................11 - 30
11.04.27 Thread check spring .....................................................................................................11-31
11.04.28 Bobbin winder ..............................................................................................................11 - 32
11.04.29 Pressure of roller presser..............................................................................................11-33
11.04.30 Re-engage safety coupling ...........................................................................................11 - 34
11.05 Adjusting the edge trimmer -725/04...........................................................................11 -35
11.05.01 Position knife holder on model 471 ...............................................................................11 - 35
11.05.02 Position knife holder on models 474 and 491 ................................................................11 - 36
11.05.03 Knife stroke on model 471 ............................................................................................11 - 37
11.05.04 Knife stroke on models 474 and 491.............................................................................11 - 38
11.05.05 Cutting stroke on model 471........................................................................................11 - 39
11.05.06 Cutting stroke on models 474 and 491..........................................................................11 - 40
11.05.07 Knife position................................................................................................................ 11 - 41
11.06 Adjusting the thread trimmer -726/05 on model 491................................................11 - 42
11.06.01 Position of the knife to the needle plate ........................................................................11 - 42
11.06.02 Knife position crosswise to sewing direciton ................................................................11 - 43
11.06.03 Knife height ..................................................................................................................11 - 44
11.06.04 Cutting stroke ...............................................................................................................11 - 45
11.06.05 Knife stroke ..................................................................................................................11 - 46
11.07 Adjusting the thread trimmer -900/53 ........................................................................11 - 47
11.07.01 Removing the cutter .....................................................................................................11 - 47
11.07.02 Control cam with respect to bobbin opener and tripping lever .......................................11 - 48
11.07.03 Radial position of the tripping lever ...............................................................................11 - 49
11.07.04 Engaging solenoid .........................................................................................................11 - 50
11.07.05 Cutter drive lever ..........................................................................................................11 - 51
11.07.06 Control cams for bobbin opener and cutter (using adjustment gauge) ...........................11 - 52
11.07.07 Radial position of the control cam in relation to the bobbin opener................................11 - 53
11.07.08 Control cam for cutter (adjustment without gauge) .......................................................11 - 54
11.07.09 Cutter control lever for the control cam of the cutter .....................................................11 - 55
11.07.10 Cutter return lever .........................................................................................................11 - 56
11.07.11 Cutter return control......................................................................................................11 - 57
11.07.12 Fitting the cutter ............................................................................................................11 - 58
11.07.13 Eccentric sleeve ...........................................................................................................11 - 59
11.07.14 Cutter driving rod .......................................................................................................... 11 - 60
11.07.15 Cutter function test ....................................................................................................... 11 - 61
11.08 Tension release (only on machines with thread tension control -906/10) ...............11 -63
11.09 Adjustment of backtacking mechanism -911/.. .........................................................11 -64
11.09.01 Needle in needle hole (only for PFAFF 471 and 491) .....................................................11 - 64
11.09.02 Coupling for roller presser drive ....................................................................................11 - 65
11.09.03 Bevel gears for feed wheel drive (on the PFAFF 471 and 474) ......................................11 - 66
11.09.04 Bevel gear play (on the PFAFF 471 and 474) ................................................................11 - 67
11.09.05 Bevel gears for feed wheel drive (on the PFAFF 491)....................................................11 - 68
11.09.06 Bevel gear play (on the PFAFF 491)..............................................................................11 - 69
11.10 Parameter settings for the Quick-Ministop Motor.....................................................11 - 70

Pfaff 491 Specifications

General

Brand	Pfaff
Model	491
Category	Sewing Machine
Language	English