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45
No.
6
7
8
Type of Break-down
Ineffective sense of
upper thread
Cause
Bad connection between take-up lever
spring and detecting plate
Bad connection of wire with thread
sensor plate
Weak tension of upper thread
Weak tension of under thread
Troubleshooting
Clean up the take-up lever spring and
detecting plate. Adjust the tension of take-
up lever spring and connecting condition of
detecting plate
Reconnect the wire with thread sensor
plate
Adjust the tension of upper sensor
Poor quality of thread
tightening
Improper timing of needle and shuttle
Slackness of exchange tension
between moving mes and fixed mes
Readjust the timing of needle and shuttle
Adjust the tension of fixed mes
Mistakes of trimming
Groove abrasion on blade of moving
mes and fixed mes
Exchange the moving and fixed mes
Adjust the tension of upper sensor
Wrong position of trimming cam
Readjust the position of trimming cam
Содержание SPS/A-1811 SERIES
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