Replacing The Bobbin Case And Threading The Thread; Thread Tension - Brother KE-484C Instruction Manual

7. CORRECT USE

7-4. Replacing the bobbin case and threading the thread

Turn off the power switch before removing or inserting the bobbin case, otherwise the machine may operate if the foot
switch is depressed by mistake, which could result in injury.
3182Q
1. Pull the shuttle race cover (1) toward you to open it.
2. Insert a new bobbin into the bobbin case, and then pas the thread through the slot (2) and pull it out from the thread hole (3)
approximately 30 mm. Check that the bobbin turns in the direction of the arrow when the thread is pulled at this time.

7-5. Thread tension

7-5-1. Reference thread tension
Upper thread
Lower thread
Upper thread tension (N)
Lower thread tension (N)
Thread take-up spring height (mm)
Thread take-up spring tension (N)
Pre-tension (N)
27
CAUTION
#4 or equivalent
#4 or equivalent
4.5 - 5.0
1.0 - 1.2
0 - 5
2.0 - 2.5
0.3 - 0.5
KE-484C
3183Q
Pull
3184Q