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SKIPPING OR IRREGULAR STITCHES
Incorrect threading......................................................
Incorrect thread tensions............................................
Needle problems - poor quality, bent or dull.....................
Needles not inserted correctly..........................................
Do not pull on fabric, guide it gently..................................
Needle plate or foot not attached correctly.......................
Cutting width dial not set correctly................................
Antenna not extended/positioned correctly........................
Incorrect pressure used for heavier fabrics..................
BREAKING THREADS
Incorrect threading......................................................
Incorrect thread tensions............................................
Thread tangled or knotted...........................................
When re-threading lower looper, needle eye must
be unthreaded before re-threading looper..................
Needle plate or foot not attached correctly......................
Antenna not extended/positioned correctly.......................
Foam pads needed on spool pin bases............................
FABRIC PUCKERS OR STRETCHES OUT OF
SHAPE
Needle tension(s) not set correctly.............................
Stitch length not set correctly......................................
Thread too heavy..................................................
Foot pressure not set correctly for fabric......................
Needle plate or foot not attached correctly.......................
Differential feed not set correctly for fabric.................
NEEDLE BREAKS
Needle strikes foot or needle plate while pulling on
fabric; do not pull fabric, gently guide it.......................
Needle problems - poor quality, bent or dull.....................
Needle(s) not inserted correctly........................................
Needle size incorrect for fabric.........................................
TROUBLESHOOTING
40-46
55-59
38
38
51
69
22, 63
16
20-49
40-46
55-59
40-46
44
69
16
16
55-59
22, 63
55-59, 67
20, 49
69
22, 59
51
38
38
38
MACHINE JAMS
Incorrect threading......................................................
Needle plate not attached correctly..................................
Stitch length too short.......................................................
Incorrect thread tensions............................................
Thread tangled or knotted...........................................
Foot pressure set too low.................................................
Foam pads needed on spool pin bases............................
Movable cutting blade is disengaged and fabric
edge is too far to right; needles can break...................
MACHINE RUNS SLOW OR NOT AT ALL
Check safety system (686 only).......................................
Reconnect foot control.......................................................
Cleaning and oiling............................................................
NOISY MACHINE
Cleaning and oiling..........................................................
Brush both cutting blades................................................
Replace bent or dull needle(s).........................................
Replace movable cutting blade........................................
FABRIC IS NOT CUT
Movable cutting blade not engaged correctly...................
Movable cutting blade not attached correctly...................
FABRIC NOT CUT CORRECTLY
Cutting width dial not set correctly................................
Movable cutting blade not attached correctly...................
Brush both cutting blades.................................................
Replace movable cutting blade........................................
Check instant rolled hem device position.........................
STITCHES ARE NOT FORMED CORRECTLY
ALONG FABRIC EDGE
Recheck stitch definitions or reference cards........
Recheck all threading points.......................................
Cutting width dial not set correctly..............................
Check instant rolled hem device position.........................
40-46
69
63
55-59
40-46
49
16
26
47
8
69
69
69
38
71
26
71
22, 63
71
69
71
24
20, 32-36
40-46
22, 63
24
74
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