Operation Manual

Contents Page:
Introduction and general safety instructions
Part 1: Operating Instructions Class 739-23
1. Product description ............................................ 5
1.1 Proper use .................................................. 5
1.2 Summary description ............................................ 5
1.2.1 Introduction .................................................. 5
1.2.2 Sewing machine head ........................................... 6
1.2.3 Material transport .............................................. 6
1.2.4 Dürkopp-Adler Control (DAC) ....................................... 6
1.3 Technical data ................................................ 6
1.4 Auxiliary equipment ............................................. 7
2. Operation of the sewing machine head ................................ 8
2.1 Recommended threads ........................................... 8
2.2 Replacement of needle ........................................... 9
2.3 Inserting of needle thread ......................................... 11
2.4 Needle thread monitor ........................................... 11
2.5 Adjustment of needle thread tension ................................... 13
2.6 Opening of needle thread tensioner ................................... 13
2.7 Adjustiment of thread regulator ...................................... 14
2.8 Winding of bobbin thread.......................................... 15
2.9 Replacement of bobbin ........................................... 16
2.10 Adjustment of bobbin thread tension ................................... 17
2.11 Inserting of needle and bobbin thread in thread scissors ....................... 18
3. Inserting of material in material clamps ............................... 19
4. Switching on of sewing machine and infeed of material clamps ................ 20
4.1 Switching on of sewing machine ..................................... 20
4.2 Infeed of material clamps.......................................... 21
4.3 Starting of sewing operation ........................................ 21
4.4 Termination of sewing operation ..................................... 21
5. Maintenance ................................................. 22
5.1 Tilting of machine head ........................................... 22
5.2 Cleaning and inspection .......................................... 22
5.3 Lubrication .................................................. 25