− 72 −
Fig. 1
7. EXTERNAL INPUT/OUTPUT
(1) Purpose of the external I/F
For LK-1941/42, exclusive I/F specifications purposed to perform interface with the external device (mainly
sequencer) should be cleared.
(2) Output signal
1) [Main shaft status output]
Signals of main shaft status are output as mentioned below. ACTIVE is LOW.
① Sewing machine status (M-STAT)
② DOWN position (D-DET)
③ UP position (U-DET)
(3) Sewing machine status output
This output is signals that can output the operating state of the sewing machine to the external device by 8
bit signals.
ACTIVE is LOW.
1) [Time chart]
Ready key →
After moving to sewing start point
Temporary stop
command
Bit 0 : Presser SW waiting
Bit 1 : Start SW waiting
Bit 2 : During sewing
Bit 3 :
Bobbin thread counter over
Bit 4 : Thread breakage error
Bit 5 :
Temporary stop SW ON
Bit 6 : Other errors
Bit 7 : Thread trimmer ON
Presser
SW ON
Start
SW ON
Presser
SW ON
Start
SW ON
Start
SW
Start
SW
Start
SW
Reset
SW
Reset
SW
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