Singer One Instruction Manual 14 - Page 83

10. Performance Checklist Whenever sewing difficulty is encountered, review the sections of the instruction book that explain the operation you are performing to make sure you are using the machine correctly. If the problem still exists, the following checklist may help you to correct it. Machine does not Sew Needle does not move. Make sure . . . • Power and light switch is on. • Machine is connected to electrical supply. (Turn to page 25 for additional information.) Needle moves but stitch is not formed. Make sure . . . • Needle is straight and sharp. • Needle style is correct for machine. • Needle size is correct for thread being used. • Needle is fully inserted into needle-clamp. • Machine is correctly threaded (See page 26.) (Turn to page 24 for additional information.) • Bobbin contains thread. • Bobbin push-button is in SEW position. • Bobbin case area is free of lint and loose threads. (See page 79.) (Turn to page 30 for additional information.) Needle and/or thread breaks. Make sure . • Needle is straight and sharp, correct style for machine, and correct size for thread being used. • Needle is fully inserted into needle-clamp. (Turn to page 24 for additional information.) • Presser foot or accessory is securely fastened to presser bar. (See page 1 0.) • Fabric is not being pulled to one side as work is removed from machine. • Fabric being guided or supported behind the needle is not being pulled too hard or too fast. (Turn to page 53 for additional information.) • Stitch Width should not exceed 2.5 when a twin-needle is being used. (See page 69.) Bobbin Winding Difficulties Upper thread breaks while winding bobbin. Make sure . . . .• Presser foot is raised. • Thread is unwinding freely from spool. • Thread spool is inserted correctly on spool holder. • Thread is not pulled too tightly when starting to wind bobbin. • Machine is correctly threaded. (See page 26.) (Turn'to page 29 for additional information.) Thread does not wind onto bobbin. Make sure . . . • Bobbin push-button is in winding position. • Thread passes under toe of presser foot before being held securely on presser foot screw. • Thread end is held securely at start of wind. • Bobbin halves are securely tightened. (See pdge 32.) (Turn to page 29 for additional information on bobbin winding.) Bobbin displaced during winding. Make sure . . . Bobbin is being wound at a moderate speed. • Bobbin is properly seated and secured by the latch in the bobbin case. Thread breaks when sewing starts after winding bobbin. Make sure . . . • Bobbin has not been wound beyond the FULL ring. Turn hand wheel away from operator to free over wound bobbin. • Bobbin case area is free of lint and loose threads. (See page 79 ) (Turn to page 29 for bobbin information.) Thread Breaks While Sewing Upper thread breaks. Make sure . . . • Machine is properly threaded. • Thread spool is inserted correctly on spool holder. • Thread is unwinding freely from spool. • Thread spool is secured by correct holder. • Thread is.even and free from knots. (Turn to page 36 for additional information.) • Needle is correct size for thread. • Needle is straight and sharp. (Turn to pages 18 and 24 for additional information.) • Upper thread tension is not too tight. (See page 36.) • Bobbin is correctly inserted in machine. (See page 31 .) • Bobbin rim is free of nicks. • Needle plate hole and presser foot are undamaged. • Threads are correctly placed under presser foot when starting to sew. (See page 30.) • Presser foot is securely fastened to presser bar. (See page 1 0.) Lower thread breaks. Make sure . . . • Bobbin has been correctly wound: • Bobbin case area is free of lint and loose threads. (See page 79.) • Bobbin has been correctly inserted into bobbin case. • Bobbin has not been wound too full. (Turn to page 30 for additional information.) Stitching Difficulties Skipped stitches. Make sure . . . • Needle is straight and sharp. • Needle is correct style for machine and size of thread. (See page 24.) • Machine is properly threaded. (See page 26 for instructions.) • Fabric is held down firmly (particulary when doing free-motion darning and embroidery). • Correct presser foot and needle plate are being used. Loose stitches on underside of fabric. Make sure . . • Needle is•straight and sharp. • Needle is correct style for machine and size for thread. (See page 24.) • Sufficient tension is being exerted on upper thread. (See page 36.) • Bobbin case area is free of lint and loose threads. (See page 79.) • Bobbin has not been wound beyond the FULL ring. • Presser bar has been lowered (particulary when sewing dense fabric). Loose irregular straight stitches. Make sure . . . • Upper thread has sufficient tension. (See page 36.) • Needle plate and presser foot are correct for fabric being sewn. Fabric does not lie flat after stitching. Make sure . . • Upper thread tension is light enough. (See page 36.) • Stitch length is short enough for fabric. (See page 34.) • Correct presser foot is being used. • Machine is correctly threaded. (See page 26 for instructions.) Feeding Difficulties Fabric does not move properly under presser foot. Make sure . . . • Machine is threaded correctly. • Presser foot or accessory is correctly attached to machine. (See page 10.) • Line of stitching is started in from fabric edge. • Stitch length dial is set correctly. • Bobbin case area is free from lint and loose thread ends. (See page 79.) 82