Contents
Contents .................................................................................Chapter – Page
8
.05 Commissioning ............................................................................................................. 8 - 5
8.06 Switching the machine on/off ....................................................................................... 8 - 5
8.07 Basic setting of the machine drive unit (only on machines with Quick-flange motor) ... 8 - 6
8.08 Mounting/connecting the start inhibitor (only on machines with Quick-flange motor) ... 8 - 8
9 Setting up .................................................................................................................... 9 -1
9.01 Inserting the needle ...................................................................................................... 9 - 1
9.02 Winding the bobbin thread; adjusting the primary thread tension ................................. 9 - 2
9.03 Removing/inserting the bobbin case ............................................................................. 9 - 3
9.04 Threading the bobbin case, adjusting the thread tension .............................................. 9 - 3
9.04.01 PFAFF 938 without thread trimmer............................................................................... 9 - 3
9.04.02 PFAFF 938 with thread trimmer .................................................................................... 9 - 4
9.04.03 PFAFF 918 .................................................................................................................... 9 - 4
9.05 Threading the needle thread / Adjusting the needle thread tension .............................. 9 - 5
9.06 Setting the zigzag stitch and the stitch position ............................................................ 9 - 6
9.07 Adjusting the stitch length ............................................................................................ 9 - 6
9.08 Entering the start and end backtacks ............................................................................ 9 - 7
10 Sewing ....................................................................................................................... 10 -1
10.01 Darning program ......................................................................................................... 10 - 2
10.02 Counted seam............................................................................................................. 10 - 2
10.03 Error messages........................................................................................................... 10 - 3
11 Care and maintenance .............................................................................................. 11 - 1
11.01 Cleaning ...................................................................................................................... 11 - 1
11.02 Lubricating the hook.................................................................................................... 11 - 2
11.03 Oiling the zigzag drive ................................................................................................. 11 - 3
11.04 Cleaning the air filter of the air-filter / lubricator........................................................... 11 - 4
11.05 Checking/adjusting the air pressure ............................................................................ 11 - 4
12 Adjustment ................................................................................................................ 12 - 1
12.01 Notes on adjustment................................................................................................... 12 - 1
12.02 Tools, gauges and other accessories for adjusting...................................................... 12 - 1
12.03 Abbreviations .............................................................................................................. 12 -1
12.04 Check and adjustment aid ........................................................................................... 12 - 2
12.05 Adjusting the basic machine ....................................................................................... 12 - 3
12.05.01 Balancing weight ......................................................................................................... 12- 3
12.05.02 Centering the needle in the needle hole (in sewing direction) ..................................... 12 - 4
12.05.03 Parallel guiding of the needle bar ................................................................................ 12 - 5
12.05.04 Locking lever ............................................................................................................... 12 - 6
12.05.05 Zero stitch and zigzag stitch scale............................................................................... 12 - 7
12.05.06 Centering the needle in the needle hole (crosswise to sewing direction).................... 12 - 8
12.05.07 Zigzag stitch width ...................................................................................................... 12- 9
12.05.08 Zigzag stitch movement .............................................................................................. 12 - 10
12.05.09 Needle penetration symmetry (left, centre and right).................................................. 12 - 11
