Contents Page:
Preface and general safety instructions
Part 1: Operating Instructions Class 868 – Original Instructions
(Edition 03/2011)
1 Product description ............................................ 5
2 Designated use ............................................... 5
3 Subclasses .................................................. 6
4 Optional equipment ............................................. 8
5 Technical data
5.1 Technicaldatasubclasses......................................... 11
6 Operation
6.1 Threadingtheneedlethread........................................ 13
6.2 Adjustingtheneedle-threadtension................................... 15
6.2.1 Function of the thread main tension and the thread supplementary tension in relation
tothesewingfootlifting .......................................... 16
6.2.2 Reparationseamwiththreadtensionalwaysclosed ......................... 16
6.2.3 Function of the thread’s supplementary tension in relation t o the stroke adjustment
andtheSpeedomat ............................................. 17
6.3 Openingthethreadtension......................................... 17
6.4 Shortstitch .................................................. 18
6.4.1 Shortstitchattheseambeginning.................................... 18
6.4.2 Shortstitchattheendofaseam..................................... 18
6.4.3 Shortstitchattheseambeginningandseamend........................... 18
6.5 Switching the supplementary tension on and off with machines without thread trimmer .... 19
6.6 Adjustingthethreadregulator....................................... 20
6.7 Winding on the hook thread ........................................ 21
6.8 Changing the hook-thread bobbin .................................... 22
6.9 Setting the hook thread tension ...................................... 23
6.10 Insertingandchangingtheneedlewithsingle-needlemachines.................. 24
6.11 Insertingandchangingtheneedlewithdouble-needlemachines.................. 25
6.12 Liftingthesewingfoot............................................ 26
6.13 Lockingthesewingfeetinliftedposition ................................ 27
6.14 Sewing-footpressure............................................ 27
6.15 Sewing-footstroke.............................................. 28
6.16 Settingthestitchlength........................................... 30
6.17 Keypadonthemachinearm........................................ 31
7 Sewing drive and operating panel ................................... 32
8Sewing..................................................... 33
