Contents Page
Introduction and safety instructions
Part 1: Operating Instructions Class 884 – Original Instructions
(Edition 10/2012)
1 Product description ........................................... 5
2 Designated use .............................................. 5
3 Subclasses ................................................. 7
4 Optional equipment ............................................ 8
5 Technical data
5.1 Technicaldatasubclasses......................................... 10
6 Operation
6.1 Threadingtheneedlethread ....................................... 11
6.2 Winding the hook thread.......................................... 12
6.3 Bobbin insertion and threading the hook thread ........................... 12
6.4 Adjustingthethreadtension ....................................... 13
6.4.1 Adjusting the hook thread tension .................................... 13
6.4.2 Adjustingtheneedlethreadtension................................... 14
6.5 Switchingthethreadtensionerson/off................................. 16
6.6 Adjustingthethreadregulator ...................................... 17
6.7 N eedle change in single needle machine with the hook to the right from the needle ...... 18
6.8 Liftingandfoldingtherollerpresser................................... 19
6.9 Sewing-footpressure............................................ 20
6.10 Sewing backward (feeding backward; backtacking) ......................... 21
6.11 Settingthestitchlength.......................................... 22
6.12 Startingthemanuallycontrolledmachinewiththeclutchmotor.................. 23
6.13 Operatingthemachineequippedwiththepositioningmotor.................... 24
6.13.1 Usingthepedal............................................... 24
6.13.2 Using the key ................................................ 25
6.14 Materialguide................................................ 26
6.14.1 Materialguideswitchon/off........................................ 26
6.14.2 Adjustingthematerialguide ....................................... 27
7 Positioning drive Efka DC1550/DA321G ............................... 28
8 Sewing with machine equipped with positioning motor
8.1 Machineautomaticfunction ....................................... 29
8.2 Exampleofmachineoperationatsewing ............................... 30
