Pfaff select 1520, Instruction Manual

Page: 80 / 82

70
Maintenance and trouble-shooting
Problem: Remedy:
The machine skips stitches
The needle is not properly inserted. Push needle fully upwards, fl at side
facing the back.
The wrong needle is inserted Use a needle system 130/705 H.
Needle is bent or blunt. Insert a new needle.
Machine is not properly threaded. Check how machine is threaded.
Needle is too small for thread. Use a larger needle.
Needle thread breaks
See reasons above. See above.
Thread tension is too tight. Adjust thread tension.
Thread is poor or has slubs in it, or has Only use good threads.
become dry after too-long storage.
Thread is too thick.
Use needle with large eye (System 130 N).
Needle breaks off
Needle is not pushed fully in. Insert new needle and push fully in.
Needle is bent Insert new needle.
Needle is too thick or too thin See needle chart (page 64)
Needle is bent, and has hit the needle Let the machine feed the fabric.
plate because you are pulling or Only guide the fabric lightly
pushing the fabric.
The bobbin case is not properly installed.
When you insert the bobbin case,
push it fully into the stop.
Seam is sewn unevenly
The tension needs adjusting Check top and bottom tensions.
Thread is too thick, slubbed or hard Only use perfect threads
The bobbin thread is unevenly wound. Do not wind thread free-hand,
but run it on through the winding tension.
Thread bunching at top or bottom Thread up correctly. Check needle and
side of fabric bobbin thread tensions
Machine does not feed or feeds irregularly
Sewing lint has collected between the Remove needle plate, remove lint
feed dog teeth rows with brush.
Feed dog is lowered, slide A (see page 27) Push slide B (see page 27) to left.
at right.
Machine is running with diffi culty
There are thread remnants in the hook race Remove the threads and apply one drop
of oil to the hook.
Trouble-shooting
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.