Brother International BAS-300G Instruction Manual - English - Page 33
Thread tension - bas 300
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4. PREPARATION BEFORE SEWING 4-5. Thread tension [Thread tension reference] Specifications Heavy-weight materials (-01[]) Upper thread #20 or similar Medium-weight materials (-02[]) #50 or similar Seatbelt (-03[]) #4 or similar Lower thread Upper thread tension (N) Lower thread tension (N) Pre-tension (N) Needle Normal sewing speed #20 or similar 1.4 − 1.8 0.1 − 0.6 DP x 17 #19 2,000 sti/min 0.2 − 0.3 #50 or similar 0.8 − 1.2 0.1 − 0.3 DP x 5 #16 2,000 sti/min #4 or similar 1.2 − 2.0 1.0 − 1.5 0.3 − 0.6 DP x 17 #25 1,300 sti/min 4-5-1. Lower thread tension Adjust the thread tension to the weakest possible tension by turning the thread tension nut (1) until the bobbin case will not drop by its own weight while the thread end coming out of the bobbin case is held. Stronger Weaker 4-5-2. Upper thread tension 2536Q 1. Turn the tension nut (1) (main tension) to adjust the tension as appropriate for the material being sewn. 2. Use the tension nut (2) (sub tension) to adjust the upper thread trailing length to about 40 mm. Stronger Weaker Stronger Weaker 2153B BAS-300G, BAS-311G, BAS-326G 24