Failure Causes And Countermeasures - SunStar KM-2070P User Manual

10
·Check the below points before you request the repair service.
·If the below process does not improve the status, turn off the power switch and ask to the purchase sales agent.
·Turn off the power switch before work and pull of the plug.
If you step on the pedal by mistake, the sewing machine starts operating and it becomes cause of injury.
Order Failure Status
Problem in machine
1
driving and operation
2 Defect of Stop Location
3 Needle broken
Cutting phenomenon of
4
thread
Danger
Failure Cause
Excessive relaxation of belt tension or
belt breakage
Short of fuse for power supply or circuit
Relaxation of main driving belt
Defect of synchro location
Damage to needle (bending of needle
or abrasion and deformation of needle
hole or groove in groove part and
needle string)
Mounting of wrong needle
Contact of needle and shuttle
Thread inserting is not correct
Defective mounting of needle (height,
direction and etc.)
Needle damage (bending or abrasion
and deformation of needle hole or
groove in groove part and needle string)
Strong tension of upper thread and
lower thread
Excessive spring tension and operation
of thread take-up spring
37
Actions
Belt tension adjustment and belt replacement
After checking short of main motor drive fuse
in control box and replace
Belt tension adjustment
Readjustment of synchro location
Needle replacement
Proper mounting of needle
Interval adjustment of needle and shuttle
Proper insertion of needle
Needle remounting
Needle replacement
Tension adjustment
Adjustment of thread take-up spring tension
and operation
R