Brother International LK3-B431 MKII Instruction Manual - Page 32

7. CORRECT USE 7-5. Replacing the bobbin case and threading the thread A CAUTION A 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. I 30mm Pull the shuttle race cover 0 you to open it. toward Insert a new bobbin into the bobbin Pass the thread through the lever case, and then pass the thread thread hole 0, and then pull out apthrough the slot 0 and pull it out proximately 30 mm of thread. from the thread hole 0. 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 Ordinary materials Denim Use Standard hook Large hook Standard hook Large hook 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) equivalent #6 or equivalent 0.6 - 0.9 0.2 - 0.3 6 - 8 0.15 - 0.35 0.1 - 0.3 1.0 - 1.3 ._ ..4_ A- equivalent equivalent 1.2 - 1.6 0.2 - 0.3 6 - 8 0.4 - 0.6 0.3 - 0.5 4- 1.4 - 1.8 . , ._ - Needle DP x 5 #14 4_ DP x 17NY #19 - 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 x 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