Trouble-Shooting - Pfaff select 1520 Instruction Manual

Trouble-shooting

Problem:
The machine skips stitches
The needle is not properly inserted.
The wrong needle is inserted
Needle is bent or blunt.
Machine is not properly threaded.
Needle is too small for thread.
Needle thread breaks
See reasons above.
Thread tension is too tight.
Thread is poor or has slubs in it, or has
become dry after too-long storage.
Thread is too thick.
Needle breaks off
Needle is not pushed fully in.
Needle is bent
Needle is too thick or too thin
Needle is bent, and has hit the needle
plate because you are pulling or
pushing the fabric.
The bobbin case is not properly installed.
Seam is sewn unevenly
The tension needs adjusting
Thread is too thick, slubbed or hard
The bobbin thread is unevenly wound.
Thread bunching at top or bottom
side of fabric
Machine does not feed or feeds irregularly
Sewing lint has collected between the
feed dog teeth rows
Feed dog is lowered, slide A (see page 27)
at right.
Machine is running with diffi culty
There are thread remnants in the hook race
Important note:
Before you replace sewing feet or needles, you must switch off the main switch.
Do not start the threaded machine without fabric in it.
If you leave the machine, even for a short time, do not forget to switch off the main
switch. This is important if children are nearby.
70
Maintenance and trouble-shooting
Remedy:
Push needle fully upwards, fl at side
facing the back.
Use a needle system 130/705 H.
Insert a new needle.
Check how machine is threaded.
Use a larger needle.
See above.
Adjust thread tension.
Only use good threads.
Use needle with large eye (System 130 N).
Insert new needle and push fully in.
Insert new needle.
See needle chart (page 64)
Let the machine feed the fabric.
Only guide the fabric lightly
When you insert the bobbin case,
push it fully into the stop.
Check top and bottom tensions.
Only use perfect threads
Do not wind thread free-hand,
but run it on through the winding tension.
Thread up correctly. Check needle and
bobbin thread tensions
Remove needle plate, remove lint
with brush.
Push slide B (see page 27) to left.
Remove the threads and apply one drop
of oil to the hook.