Troubleshooting Guide - Proline SMART16 Manual De Instrucciones

ADJUSTING THE STITCH
1.
Normal stitching shall have top and
bottom threading evenly, neither
over tight nor loose.
Top thread
Cloth
Bottom thread
APPLICABLE CLOTH FOR SEWING
Cotton
/ Linen
Regular
Thick
Thin
Hard
Soft

TROUBLESHOOTING GUIDE

Problem
Skipped stitches
Needle
breaks.
Loose, uneven stitches
2.
If the bottom threading looks like
a straight line, it indicates that the
top thread is too loose. Please
turn upper thread tension dial to
direction with bigger number to
increase pressure until the
stitching returns to normal.
Silk /
Polyester
Wool
Possible Cause
The needle is not inserted correctly.
The needle is damaged.
The foot is not attached correctly.
The needle is damaged.
The needle is not correctly inserted.
Pull fabric with force when sewing
Needle is not lowered into fabric
when start sewing.
The machine is not correctly
threaded.
The bobbin spool is not correctly
threaded.
Needle bent
Thread tension is wrong.
Elasti
c
means easy to
sew
Means difficult
to sew
means not
smooth to
sew
Hard:Jeans, fine
canvas,etc.
Soft:towel,
duster,
etc.
Remove and re-insert the needle (flat side
towards the back).
Insert a new needle.
Check and attach correctly.
Insert a new needle.
Insert the needle correctly (flat side towards
the back).
Remove and insert a new needle.
Remove and insert a new needle. Thread
again, turn the hand wheel to lower the
needle into fabric, then start sewing.
Check the threading.
Thread the bobbin spool.
Remove and insert a new needle.
Correct the thread tension.
EN - 8
3.
If the top thread looks like a
straight line, it indicates an
over-tight top thread. Please
turn the upper thread tension
dial to the direction with
smaller number to reduce
pressure until the stitching
returns to normal.
Fabric thickness:
＜ 0.35
Thin fabric
mm
Regular fabric 0.35 mm
~ 0.8 mm
Thick fabric
0.8mm
Elastic cloth:
If cloth size is 100 mm x 30
mm and the cloth can be
extended to or over 106
mm under 0.5kg tension
force, then the cloth is
elastic.
Possible Solution
＞