Brother International BAS-300G Basic Instruction Manual - English - Page 31

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 Lower thread #20 or similar #50 or similar Upper thread tension (N) 1.4 − 1.8 0.8 − 1.2 Lower thread tension (N) 0.2 − 0.3 Pre-tension (N) 0.1 − 0.6 0.1 − 0.3 Needle DP x 17 #19 DP x 5 #16 Normal sewing speed 2,000 sti/min 2,000 sti/min Seatbelt (-03[]) #4 or similar #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 Stronger Weaker 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. 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 23