Mitsubishi PLK-E1010, Technical Manual

Page: 43 / 52

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Bad condition Cause Remedy
Ref. page
& Item
Pre-tension is too loose Make pre-tension tighter 7-14
Adjust trimmer cam position 7-10
Trimmer timing is delayed
Adjust synchronizer position 7-18
Upper thread tension release
timing is too fast
Delay tension release timing
Control
unit
4.
Thread tail from
needle is too
long after
trimming
Tread guide is in wrong position
Adjust thread guide position
properly
7-5
Trimmer function is canceled Resume trimmer function
Control
unit
Fixed knife is dull Change it new knife 7-11
Movable Knife is in wrong
position
Adjust movable knife position
properly
7-11
Skip stitching happens at
trimming
Fix skip stitching 7-6
Adjust trimmer cam position 7-10
5.
Trimming is
not functioned
Trimmer timing is wrong
Adjust synchronizer position 7-18
Needle and shuttle hook
clearance is too big
Adjust needle and shuttle hook
timing properly
7-2
Needle and shuttle hook timing
is not correct
Adjust needle and shuttle hook
timing properly
7-2
Needle is bent Change it new needle ----
Needle is bent by driver
Adjust needle and diver clearance
properly
7-4
Needle is in wrong position Amend needle position 7-2
6.
Skip stitching
often happens
Presser foot position is not
correct
Adjust presser foot position
properly
7-6
Upper thread tension is not
tight enough
Increase upper thread tension 6-3(2)
Adjust tension regulator position
properly
7-17
Thread tension regulator’s
discs are opened during sewing
Adjust upper tension release
position properly
7-17
Presser foot position is not
correct
Adjust presser foot position
properly
7-6-1
Driver and shuttle hook
clearance is very small
Change shuttle hook ----
7.
Stitch forming
is loose
Presser foot up and down
timing is not proper
Adjust presser foot timing properly 7-6-3
Cables wiring is disconnected Connect all cables precisely 3
System software is not loaded
Load system software to control
box
5-1
Emergency stop switch is kept
ON
Release emergency stop switch
lock
6-1(3)
8.
Sewing
machine does
not work even
start switch is
turned ON
Start switch is out of order Change it new start switch ----
Synchronizer cable is
disconnected
Connect synchronizer cable
precisely
Control
unit
9.
Sewing
machine runs
idle at high
speed when
power switch
is turned ON
Synchronizer is out of order Change it new synchronizer ----
From the library of Superior Sewing Machine & Supply LLC • www.supsew.com