Brother International LK3-B432E MKII Instruction Manual - English - Page 31

7. CORRECT USE 7-5. Replacing the bobbin case and threading the thread CAUTION Turn off the power switch before removing and replacing the bobbin case, otherwise the machine may operate if the foot switch is depressed by mistake and serious injury could result. w r 30mm e q Pull the shuttle race cover q toward Insert a new bobbin into the bobbin Pass the thread through the lever you to open it. case, and then pass the thread thread hole r, and then pull out ap- through the slot w and pull it out proximately 30 mm of thread. from the thread hole e. Check that the bobbin turns in the direction of the arrow when the thread is pulled at this time. 7-6 . Sewing conditions and thread tension Use Upper thread Lower thread Upper thread tension (N) Lower thread tension (N) Thread take-up spring height (mm) Thread take-up spring tension (N) Ordinary materials Standard hook #50 or equivalent #60 or equivalent Large hook ˡ ˡ 0.6 - 0.9 1.0 - 1.3 0.2 - 0.3 ˡ 6 - 8 ˡ 0.15 - 0.35 ˡ Pre-tension (N) 0.1 - 0.3 ˡ Denim Standard hook #30 or equivalent #50 or equivalent Large hook ˡ ˡ 1.2 - 1.6 1.4 - 1.8 0.2 - 0.3 ˡ 6 - 8 ˡ 0.4 - 0.6 ˡ 0.3 - 0.5 ˡ Needle DP × 5 #14 ˡ DP × 17NY #19 ˡ Knitted materials Standard hook #60 or equivalent #80 or equivalent 0.8 - 1.2 0.25 - 0.3 8 - 9 0.4 - 0.5 0.1 - 0.3 DP × 5#9 The sewing conditions given in the above table may need to be changed depending on the article being sewn. 25 LK3-B430E-, B431E-, B432E-, B433E- Mark II