Instruction manual

GB
Contents Page:
Preface and General Safety Instructions
Part 1: Operating instructions Class 669
(Edition 12/2008)
1. Product Description ............................................ 3
2. Designated Use ............................................... 3
3. Subclasses .................................................. 4
4. Optional Equipment ............................................ 5
5. Technical Data
5.1 Technicaldatasubclasses ......................................... 7
6. Operation
6.1 Threading the needle thread ........................................ 8
6.2 Adjusting the needle thread tension.................................... 9
6.2.1 Function of the main thread tension and the s upplementary thread tension
in relation to the sewing-foot lift for subclass 669-180312 ...................... 10
6.2.2 Function of the supplementary thread tension in relation to the stroke adjustment
and the Speedomat for s ubclass 669-180312 .............................. 11
6.3 Adjusting the needle thread tension.................................... 12
6.4 Turning the supplementary thread tension on and off for subclasses 669-180010
and 669-180112 ................................................ 12
6.5 Adjusting the thread regulator ....................................... 13
6.6 Winding the bobbin thread ......................................... 14
6.7 Replacing the shuttle bobbin ........................................ 15
6.8 Pre-settingtheshuttlethreadtension................................... 16
6.9 Inserting and replacing the needle .................................... 17
6.10 Raisingthesewingfeet........................................... 18
6.11 Settingthesewingfeetinthehighposition ............................... 19
6.12 Sewingfootpressure ............................................ 19
6.13 Sewingfootstroke.............................................. 20
6.14 Adjusting the stitch length.......................................... 22
6.15 Keypadonthemachinearm........................................ 23