Brother International PR670E Operation Manual - Page 105

As shown in the illustration, hold the b bobbin case against a smooth vertical surface. OTHER BASIC PROCEDURES After making the adjustments, try d embroidering with all needle bars to check the thread tension. Memo • In the built-in embroidery patterns, one pattern is used for checking the thread tension. By sewing this pattern, the thread tension can easily be checked. For details, refer to page 197. 3 • If the thread with the weight attached is slowly pulled out, the thread tension is correct. Use the included standard screwdriver to c turn the tension-adjusting screw and adjust the thread tension. 1 Tension-adjusting screw 2 Tighter 3 Looser Adjusting the tension of the upper thread When embroidering, the thread tension should be set so that the upper thread can slightly be seen on the wrong side of the fabric. Turn the thread tension knobs. a 1 Thread tension knobs 2 Tighter 3 Looser 4 Mark  If the thread tension is not still correctly adjusted, turn the upper thread guide pretension knob. 103