Operation Manual

Contents Page:

Preface and General Safety Instructions

Part 1: Operating Instructions Class 869

(Edition 03/2009)

1. Product Description ............................................ 4

2. Designated Use ............................................... 4

3. Subclasses .................................................. 5

4. Optional Equipment ............................................ 6

5. Technical data

5.1 Technicaldatasubclasses ......................................... 8

6. Operation

6.1 Threading the needle thread ........................................ 10

6.2 Adjusting the needle-thread tension ................................... 11

6.2.1 Function of the main thread tension and the supplementary thread tension in relation to the

sewing foot lifting for subclass 869- ... .................................. 12

6.2.2 Function of supplementary thread tension in relation to the sewing foot lifting and the

Speedomat for subclass 869- ... ..................................... 13

6.3 Opening the thread tension ......................................... 13

6.4 Turning the supplementary thread tension on and off for Subclasses

869-180020, 869-280020, 869-180122 and 869-280122 ....................... 14

6.5 Adjusting the thread regulator ....................................... 15

6.6 Winding on the hook thread ......................................... 16

6.7 Changing the hook-thread bobbin ..................................... 17

6.8 Setting the hook thread tension ...................................... 18

6.9 Inserting and changing the needle with single-needle machines .................. 19

6.10 Inserting and changing the needle w ith double-needle machines .................. 20

6.11 Liftingthesewingfoot............................................ 21

6.12 Lockingthesewingfeetinliftedposition................................. 22

6.13 Sewingfootpressure ............................................ 22

6.14 Sewing-footstroke.............................................. 23

6.15 Setting the stitch length ........................................... 25

6.16 Keypadonthemachinearm........................................ 26

7. Sew ing

7.1 SewingwithmachinesusingtheFIRclutchpositioningdrive .................... 27

7.2 Sewing with machines using the Efka DC1550/DA321G positioning drive ............ 28