Thread Heat Cutter Unit Flow Chart 2 For Lk - JUKI LK-1942ZA5050 Instruction Manual And Parts List

(2) Thread heat cutter unit flow chart 2 for LK

Thread trimming
process starts
Tension releaser ON
Tension disk Opens
Wiper ON
Tension
OFF
releaser
Tension
Closes
disk
Upper heat
Extrudes
wire
Upper heat wire
ON
extrusion end
YES
Upper heat
Retracts
wire
Upper heat wire
ON
retracted end
YES
Wiper OFF
END
Lower heat
Extrudes
wire
* After a
lapse of
Lower heat wire
T1
extrusion end
YES
* After a
lapse of
Lower heat
T2 Retracts
wire
NO
Lower heat wire
retracted end
YES
* After a
lapse of
T3
NO
– 23 –
Bobbin thread
replacement starts
Bobbin thread
replacement
signal = ON
NO
ON
Sewing machine
stops at standby
position
* After a
lapse of
T4
Sensor
head
NO
ON
RESET switch
Bobbin
case
positioning
finger
Bobbin case positioning
finger extrusion end
Bobbin
case
positioning
finger
Bobbin case holder
positioning finger
retraction end
Sensor
head
NO
YES
NO
YES
Escapes
NO
ON
YES
Extrudes
NO
ON
YES
Retracts
NO
ON
YES
Retracts
END