ELNA 344 Instruction Manual page 72

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..............
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...............
FABRIC PUCKERS OR STRETCHES OUT
OF SHAPE
Needle tension(s) too high........................................
Stitch length not set correctly....................................
Thread too heavy......................................................
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................................
TROUBLESHOOTING
MACHINE JAMS
Incorrect threading..........................................
26-34
Needle plate not attached correctly.......................
36-42
Stitch length too short...........................................
16
Incorrect thread tensions.................................
16
Thread tangled or knotted....................................
46
Upper cutting blade is disengaged and
20
58
24
MACHINE RUNS SLOW OR NOT AT ALL
26-34
Check safety system............................................
36-42
Reconnect foot control..........................................
26
Clean and oil........................................................
Switch machine on................................................
30 NOISY MACHINE
20
Clean and oil........................................................
24
Brush both cutting blades.....................................
Replace bent or dull needle(s)..............................
Replace upper cutting blade.................................
FABRIC IS NOT CUT
56
54
Upper cutting blade not engaged correctly...........
26
Upper cutting blade not attached correctly...........
20
56
FABRIC NOT CUT CORRECTLY
Cutting width dial not set correctly........................
Upper cutting blade not attached correctly...........
Brush both cutting blades.....................................
Replace upper cutting blade.................................
46
Check instant rolled hem device position.............
16
16
STITCHES ARE NOT FORMED CORRECTLY
ALONG FABRIC EDGE
Recheck all threading points...........................
Cutting width dial not set correctly........................
Check instant rolled hem device position.............
71
fabric edge is too far to right; needles
can break............................................................
26-34
66
54
36-42
26
18
44
14
66
14
66
66
16
68
18
68
58
68
66
68
22
26-34
58
22