Pfaff 3822-1/22, Instruction Manual

4  PFAFF

47

Automatic backtacking system ...................................................................................... 44

48

Stitch condensation system ........................................................................................... 44

49

Edge trimming system ................................................................................................... 46

.1

Trimming movement ...................................................................................................... 46

.2

Neutral point .................................................................................................................. 46

.3

Knife height .................................................................................................................... 46

.4

Positioning the top knife in sewing direction ................................................................. 46

.5

Positioning the top knife crosswise to sewing direction ................................................ 46

.6

Adjusting the stop eccentric .......................................................................................... 46

50

Step-cut trimming mechanism ....................................................................................... 50

.1

Note on motor control .................................................................................................... 50

.2

Preparations for adjusting the trimmer .......................................................................... 50

.3

Setting the longest knife stroke ..................................................................................... 50

.4

Setting the top reversal point of the knife ...................................................................... 50

.5

Positioning the top knife bracket and front top knife according to the needle
plate ............................................................................................................................... 52

.5.1 Cutting angle of the front top knife ................................................................................ 52
.5.2 Cutting position of the front top knife ............................................................................ 52
.5.3 Cutting pressure of the front top knife ........................................................................... 52
.6

Neutral point of top knife movement ............................................................................. 54

.7

Setting top knife at highest point ................................................................................... 54

.8

Positioning the rear top knife and hook knife ................................................................. 54

.8.1 Lateral position of the rear top knife to hook knife ......................................................... 54
.8.2 Cutting angle of the rear top knife in relation to the hook knife ..................................... 56
.8.3 Cutting pressure between rear top knife and hook knife ............................................... 56
.8.4 Setting the cutting depth of the rear top knife in relation to the hook knife ................... 58
.9

Settng the cutting depth of the front top knife .............................................................. 58

.10

Setting the trimming margin .......................................................................................... 58

.11

Basic adjustments on the top knife mounting ................................................................ 60

.11.1 Cutting angle of the rear top knife ................................................................................. 60
.12

Sensor controlled monitoring of the hook knife ............................................................. 62

.12.1 Function ......................................................................................................................... 62
.12.2 Sensor adjustment ......................................................................................................... 62
.12.3 Fault finding and remedy ................................................................................................ 64

51

Airblast for ply separation .............................................................................................. 66

52

Airblast for cutting waste ............................................................................................... 66

53

Differential quick adjusting device for altering the fullness ............................................ 68

.1

Zeroing the rapid differential adjustment ....................................................................... 68

.1.1 Rough adjustment on the angle encoder ....................................................................... 68
.1.2 Precise adjustment on pot "0" ........................................................................................ 68
.2

Key arrangement to set pointer 1 .................................................................................. 70

.2.1 Key "0" and "1 to 4" ......................................................................................................... 70
.2.2 Keys "5 to 7" ................................................................................................................... 70
.3

Basic setting of the fullness quantities of keys "1 to 7" .................................................. 70

.3.1 Adjustment of fullness key "1" ....................................................................................... 70
.3.2 Adjustment of fullness key "2" ....................................................................................... 70
.4

Feed lever ...................................................................................................................... 72

.5

Sample adjustment of the potentiometer ...................................................................... 74

54

Care and maintenance ................................................................................................... 76

.1

Sewing machine ............................................................................................................ 76

.1.1 Oiling the sewing machine ............................................................................................. 76
.1.2 Cleaning the sewing machine ........................................................................................ 76
.2

Air filter/lubricator ........................................................................................................... 76

.2.1 Water trop bowl ............................................................................................................. 76
.2.2 Air filter .......................................................................................................................... 76
.3

Recommended lubricants .............................................................................................. 77

only on 3822-1/22

only on 3822-1/24