Pfaff GrandQuilter 18.8 Owner's Manual - Page 14

Check the tension of the bobbin by holding the loaded bobbin case in one hand. With one hand under the bobbin case, hold the tail of thread and watch as the thread flows out of the bobbin case. A slight bounce should cause the bobbin case to slide down the thread. If the thread slides out of the case as you pick it up, it needs more tension. If it barely moves down the thread or doesn't move at all, it needs less tension. Use a small screwdriver to turn the largest set screw on the bobbin case to adjust tension. Make very, very small adjustments. Be very careful not to remove the screw as it is very small and difficult to find if lost. Remember, righty (clockwise) tighty, lefty (counter clockwise) loosey. To place the bobbin into the machine: 1. Insert the bobbin into the bobbin case. 2. Holding the bobbin case pull the thread through the slot. 3. Draw the thread down and under the spring, making sure the thread is in the highest position of the bobbin case. 4. Place the bobbin case in the machine. Always listen for the pop as it engages in the machine. We suggest using a soft bristle brush to wipe out the bobbin case and the bobbin area. Canned air only blows the lint around. By using the soft bristle brush you collect the dust on the brush. Each day before you start quilting, unthread your machine past the take up lever and remove the bobbin case, place a small drop of oil in the bobbin hook area before you begin quilting. This will clean out the fuzz and lint. Place a drop of oil in the bobbin hook area. Turn your machine on to run at the slowest setting. TIP: Lint has a tendency to build up in the bobbin case especially with cotton threads. A tiny amount of lint can cause a huge headache! Check the bobbin each time you change it to keep it clean. 14