Brother 884-B20 Owner's Manual page 28

3. Set the two-thread-switching plate.
Move part <E> of the two-thread-switching plate
in the direction of the arrow to insert its tip into the
eye at the end of the upper looper from behind.
NOTE:
Make sure that the tip is in the eye of the upper
looper 1 .
Releasing the two-thread-switching plate
1. Push area <A> of the two-thread-switching
plate to the back to remove the tip from the
eye at the end of the upper looper, and then
move it in the direction of the arrow.
2. Close the front cover <B>.
Closing the front cover also closes the knife
cover <C>.
26
Chart of two-thread overlock stitch
Stitch style
Stitch length
Stitch width
Stitch finger
Thread tension
Left needle thread
Lower looper thread
Right needle thread
Lower looper thread
NOTE:
For details on these operations, watch the video.
https://s.brother/cvtkb/
Reverse
Surface
3
5 - 7.5
Raised
For fine For medium
materials materials
2 (1 - 3) 2 (1 - 3)
6 (5 - 7) 6 (5 - 7)
2 (1 - 3) 2 (1 - 3)
6 (5 - 7) 6 (5 - 7)