Brother International KE-436C Instruction Manual - English - Page 37

6. CORRECT USE 6-5. Replacing the bobbin case and threading the thread CAUTION 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. 2610Q 2534Q 30mm 2535Q 1. Pull the shuttle race cover (1) toward you to open it. 2. Insert a new bobbin into the bobbin case, and then pass the thread through the slot (2) and pull it out from the thread hole (3). Check that the bobbin turns in the direction of the arrow when the thread is pulled at this time. 3. Pass the thread through the lever thread hole (4), and then pull out approximately 30 mm of thread. 6-6. Thread tension 6-6-1. Sewing conditions and thread tension Use Upper thread Lower thread Medium materials Standard hook #50 or equivalent #60 or equivalent Large hook ← ← Upper thread tension (N) 0.6 - 0.9 1.0 - 1.3 Heavy materials Standard hook #30 or equivalent #50 or equivalent Large hook ← ← 1.2 - 1.6 1.4 - 1.8 Lower thread tension (N) 0.2 - 0.3 ← 0.2 - 0.3 ← Thread take-up spring height (mm) 9 - 11 ← 9 - 11 ← Thread take-up spring tension (N) 0.15 - 0.35 ← 0.4 - 0.6 ← Pre-tension (N) 0.1 - 0.3 ← 0.3 - 0.5 ← Needle DP × 5 #14 ← DP × 17NY #19 ← The sewing conditions given in the above table may need to be changed depending on the article being sewn. 31 KE-436C