Mitsubishi LS2-210 User Manual

6. TROUBLESHOOTING
Trouble
Cause Corrective Action
Reference
Section
Thread cannot be trim
med.
Knife engagement is improper. Adjust the engagement amount. 5.1.8
Knife engaging pressure is too low. Adjust the engaging pressure.
• 5.1.8
Damage and/or wear of cutting edge
of movable knife (left), fixed blade
Change the knife and/or blade.
Machine stops too early.
Adjust the stop position.
4.2
Machine stop position varies largely.
Check needle thread tension at the
time of thread trimming.
5.1.9
Position of fixed blade is improper.
Adjust the position of fixed blade.
5.1.3
Since the movable knife (left) is
operated too early, loop spreading
cannot be performed by the knife.
Adjust the installation of thread
trimmer cam.
5.1.7
Neeedle thread comes
out of the needle at the
start of stitching.
At the time of thread trimming,
thread tension regulator discs do not
open.
Adjust the needle thread tension
releasing.
5.1.9
Thread trimmer timing is too early.
Adjust the installation of thread
trimmer cam.
5.1.7
Thread is trimmed by the fixed blade
before the cutting edge of movable
knife (left) engage with the fixed
blade.
Adjust the position of fixed blade.
5.1.3
Needle is too thick with respect to
the thread.
Pretension is too strong.
Adjust the pretension.
5.2
Skip stitch at the start of
stitching
Bobbin thread becomes short due to
the Idle running of bobbin at the
thread trimming.
Use a bobbin case with idle running
prevention spring.
5.9
Tension of bobbin thread Is too
strong.
The remaining length of needle
thread on the needle side is too short
after thread trimming.
Adjust the tension of bobbin thread.
1. Adjust the pretension.
2. Check the installation of thread
trimmer cam.
3. Check the thread contact area.
5.2
5.1.7
Needle thread is too long
after thread trimming.
Pretension is too weak.
Thread trimmer timing is too late.
Thread movement between the hook
and the hook positioner is not
smooth.
Adjust the pretension.
Adjust the installation of thread
trimmer cam.
5.2
5.1.7
20
From the library of: Superior Sewing Machine & Supply LLC

Mitsubishi LS2-210 Specifications

General

Brand	Mitsubishi
Model	LS2-210
Category	Sewing Machine
Language	English