Pfaff 3811-2/45 Instruction Manual page 3

Notes on safety ................................................................................................................ 2
What the symbols mean .................................................................................................. 2
Fields of application .......................................................................................................... 5
1 Technical data .................................................................................................................. 5
2 Operation elements and optical displays .......................................................................... 6
3 Initial check ...................................................................................................................... 8
4 Installing the machine ...................................................................................................... 8
5 Connecting compressed air and electricity ...................................................................... 8
.1 Compressed air ................................................................................................................ 8
.2 Electricity ......................................................................................................................... 8
6 Switching the machine on ................................................................................................ 8
7 Switching the machine off ............................................................................................... 8
8 Check ............................................................................................................................. 10
.1 Oil level in the sewing machine ..................................................................................... 10
.2 Direction of rotation ....................................................................................................... 10
9 Inserting the needle ....................................................................................................... 10
10 For your attention before the initial operation ................................................................ 10
11 Needle thread and hook thread ...................................................................................... 12
.1 Threading the needle thread .......................................................................................... 12
.2 Adjusting the needle thread tension .............................................................................. 12
.3 Threading the hook thread ............................................................................................. 12
.4 Adjusting the hook thread tension ................................................................................. 12
12 Top feed pressure and presser foot pressure ................................................................ 14
.1 Adjusting the top feed pressure ..................................................................................... 14
.2 Adjusting the presser foot pressure ............................................................................... 14
13 Adjusting the stitch length ............................................................................................. 14
14 Preparing for adjustments .............................................................................................. 16
15 Needle position in the needle hole ................................................................................. 16
.1 Across the sewing direction ........................................................................................... 16
.2 With the sewing direction .............................................................................................. 16
16 Preadjusting the needle height ....................................................................................... 18
17 Bottom feed settings ..................................................................................................... 20
.1 Zeroing the main feed dog ............................................................................................. 20
.2 Limiting the shortest stitch length to 2 mm ................................................................... 20
.3 Main feed and differential feed synchronicity ................................................................ 22
.4 Lateral motion of main and differential feeds ................................................................. 24
.5 Lifting motion of main and differential feeds.................................................................. 26
.6 Setting the feed dog ...................................................................................................... 28
18 Top feed settings ........................................................................................................... 30
.1 Synchronicity of top and bottom feeds .......................................................................... 30
.2 Vibrating presser - lifting motion .................................................................................... 32
.3 Vibrating presser - stroke ............................................................................................... 32
.4 Front connecting rod to the top feed drive ..................................................................... 34
19 Basic stitch length .......................................................................................................... 36
.1 Adjust basic stitch length to 3 mm ................................................................................ 36
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