Pfaff powerquilter 16.0 Manual - Page 20

Loosen Top Thread Tension To loosen the tension, turn the top thread tension knob (page 10, Figure 1, #5) counter-clockwise. NOTE: Before adjusting the top tension, remember to floss or pull the top thread up into the tension discs or it will float outside the discs providing little or no top tension. This could cause significant tension or nesting problems on the bottom side of the quilt. If the top tension is too loose (causing loops of thread on the underside of the quilt) and no amount of tightening the top thread tension knob seems to affect it, there's a good chance that the thread is riding on the outside of the tension discs and is not "flossed" between them. A stitch is balanced when the top thread and the bobbin thread meet in the middle of Havingtshetetheqbuobiblitn stharenaddtewnsiiocnhpr.operly, and the top thread looks like Diagram A: Problem: The top thread is too tight. Solution: Loosen the top thread tension discs. Having set the bobbin thread tension properly, and the top thread looks like DiagramB: Problem: The top thread is too loose. Solution: Loosen the top thread tension discs. Tight Top Thread Diagram A Loose Top Thread Diagram B 6 Figure 16 Maintenance NOTE: Turn off the machine and remove the power cord when performing maintenance on the machine. Cleaning and Lubricating the Machine Only use light sewing machine oil in the powerquilter™ 16.0 quilting machine. Internal oiling is not necessary on the powerquilter™ 16.0 quilting machine except when the machine is taken to a service technician for routine maintenance and cleaning. The hook assembly, however, needs regular lubricating. Failure to keep the hook assembly lubricated can cause severe damage to the machine. Figure 17 To lubricate, turn off the machine. Remove the bobbin and case before oiling. Clean around the hook assembly with a soft brush to remove lint. Put a very small drop of oil on the hook in the region where the bobbin basket assembly and the rotating hook meet (see Figure 17). The bobbin basket is the portion of the hook that the bobbin case snaps into. The bobbin basket remains stationary while the hook rotates around the basket. The oil lubricates the region where these two components interlock. A drop of oil in the region indicated will work its way back into the interlocking area of the hook and bobbin basket. The frequency of lubrication depends upon the usage of the machine. Lubricating is recommended before running the machine if it has not been used regularly, or every other bobbin change if used frequently. After oiling, always stitch through a scrap piece of fabric, as oil may cling to thread. Over-oiling can cause excess dripping from the bobbin assembly. Lack of lubricant may be noticed by a change in the sound of the machine and will affect stitch quality. Cleaning the Touch-Screen Display Use a soft rag dampened with isopropyl alcohol to gently wipe the display and remove any marks. Never use any other chemicals to clean your display as they may adversely affect the touch-screen response and clarity. Page 20