Troubleshooting - SunStar SPS/E-BS1201 Series User Manual

Troubleshooting

7.1) Machine Part
No. Trouble
Faulty machine
1
operation
Improper stop position
2
3 Needle break
4 Thread break
Stitch skip
5
Cause
Excessive relaxation of the belt tension or
the damage to the belt
Power cutoff or the cut of the circuit fuse
Separation of feed bracket from X or Y limit
Loose main driving belt
Wrong synchro location
Damage to needle (crooked needle, scratch
on needle hole or groove, abrasion or
deformation of the needle tip)
Wrong needle installed
Contact between needle and hook
Wrong thread placement
Wrong needle installation (needle height,
needle direction, etc.)
Damaged needle (crooked needle, scratch
on needle hole or groove, abrasion or
deformation of the needle tip)
Too strong upper and lower thread tension
Excessive thread take-up lever spring
tension and moving scope
Crooked needle
Improper needle for thread used
Bad needle fitting condition
Improper needle and timing
Improper groove, and wide gap between
shuttle points
Excessive thread take-up lever spring
tension and moving scope
Corrective Action
Adjust the belt tension and replace the belt
Check whether the main shaft motor drive
fuse is cut and replace it if so.
Properly place the feed bracket at the
normal position (within the scope of the limit
switch)
Adjust the belt tension
Adjust the synchro location
Replace the needle
Replace the current needle with proper one
Adjust the distance between needle and
hook properly
Insert the needle again
Replace the needle
Adjust the tension
Adjust the thread take-up lever spring
tension and moving scope
Replace the needle
Replace the needle
Refit the needle
Adjust the needle and shuttle points
Adjust the needle and shuttle points
Adjust the thread take-up lever spring
tension and moving scope
37