JUKI PS-800 User manual

CAUTION :
This Instruction Manual describes the bobbin thread remaining amount detection device. When
you want to use your sewing machine with this product attached, refer to the “Safety precau-
tions” in the Instruction Manual for your sewing machine carefully until you fully understand
the included precautions in prior.
PS-800
Bobbin thread remaining amount
detection device
INSTRUCTION MANUAL

i
CONTENTS
1. List of parts ............................................................................................................................1
2. Wiring connection.................................................................................................................. 3
3. Setting the sensor status ...................................................................................................... 5
3-1. Installing the sensor.....................................................................................................................6
3-2. Adjusting the position of the sensor ..........................................................................................7
3-3. Setting the operation panel .........................................................................................................9

– 1 –
1. List of parts
❾
❼❽
❹❺
❻
❸
❷
❶
No. Product name Q'ty Remarks
❶Sensor 1
❷Sensor fixation screw 2
❸Nut 1
❹Sensor clamp plate A 1
❺Sensor clamp plate B 1
❻Plate fixation screw 2
❼Sensor fixation plain washer 2
❽Sensor fixation spring washer 2
❾Bobbin case 1
󱢳Sensor junction cable 1
󱢳

– 2 –
No. Product name Q'ty Remarks
󱢴OP junction cable A ( * ) For the PS-800-12080 standard type
󱢵OP junction cable C ( * ) For the PS-800-8045 & -13085 standard type
󱢶OP junction cable D ( * ) For the PS-800 with a rotary knife type
󱢷Jig (collar + plate) 1 To be used only when adjusting the assembly
* 󱢴to 󱢶use different cables according to the model of sewing machine.
󱢴For the PS-800-12080 standard type
󱢶For the PS-800 with a rotary knife type
󱢵For the PS-800-8045 & -13085 standard type
12 pin Black
4 pin Blue
12 pin Black
6 pin Blue
8 pin White
2 pin White
6 pin White
6 pin Blue
6 pin White
6 pin Blue
8 pin White
2 pin White
4 pin Blue
6 pin Blue 󱢷

– 3 –
1) Connect sensor ❶with sensor junction cable
󱢳.
2. Wiring connection
❶❶
3) Pull the sensor cable into the inside of the electrical box. (The cable path differs with the size of
sewing machine.)
󱢳󱢳
2) Connect sensor junction cable 󱢳with OP
junction cable 󱢴(or 󱢵or 󱢶).
[ PS-800-12080 Standard type ]
Connect sensor junction cable 󱢳with the
6-pin blue connector of OP junction cable A
󱢴.
[ PS-800-8045 & -13085 Standard types ]
Connect sensor junction cable 󱢳with the
6-pin blue connector of OP junction cable C
󱢵.
[ PS-800 Rotary knife type ]
Connect sensor junction cable 󱢳with 6-pin
blue connector of OP junction cable D 󱢶.
6 pin Blue
󱢳󱢳
󱢴/ 󱢵/ 󱢶
Inside the elec-
trical box
①
①Pull two cables coming from the BK-8 control
box into the top surface of the electrical box
through the clearance provided between the
sewing machine housing and the frame.
②Pull the cables into the inside of the electrical
rack through the hole in the top surface of the
electrical rack.
[ PS-800-8045 ]
②

– 4 –
①Pass two cables coming from the BK-8 control
box through the cable duct in the side face of
the sewing machine.
②Pull the cables into the inside of the electrical
rack through the hole in the top surface of the
electrical rack.
[ PS-800-12080&13085 ]
①
②
③③Pull the cables into the inside of the electrical
rack through the hole in the top surface of the
electrical rack.

– 5 –
3. Setting the sensor status
Turn ON the power to the sewing machine. Set output operation setting to the [ ON when no light is not
input ] following the procedure described below. For the hold setting, set it to the [ Hold ON ].

– 6 –
1) Temporarily secure fixation plate A ❹, fixation
plate B ❺and sensor ❶as illustrated in the
figure.
Secure the aforementioned parts after you
have adjusted sensor. Firmly assemble them
so that they do not rattle.
❷Sensor fixation screws (2 pieces)
❸Nut
❻Plate fixation screws
❼Sensor fixation plain washer
❽Sensor fixation spring washer
❹❹
❺❺
3-1. Installing the sensor
❶❶
❷❼❽❷❼❽
❷❼❽❷❼❽
❻❻
❸❸
2) Detach hook oil supply tube 󱢹. Detach fixa-
tion screws 󱢸of the oil tank. Secure sensor
fixation plate B ❺between the oil tank and the
bed. Pass tube 󱢹through the hole in the plate
and connect to the oil tank.
3) Secure sensor ❶while shifting it to the left
side of plate ❹.
󱢸󱢸
󱢹󱢹
󱢸󱢸
❻❻❺❺
Inner hook Left side
❶❶
❹❹

– 7 –
3-2. Adjusting the position of the sensor
1) Attach jig 󱢷to hook 󱢺. Turn
hook 󱢺set the jig at the cen-
ter of backlash of hook 󱢺.
Loosen screws ❻and 󱢸.
Adjust the position of plate A
❹and plate B ❺.
Adjust the position of the
sensor so that the top surface
of sensor ❶comes in close
contact with the undersurface
of jig plate 󱢷-1. (Adjustment
of the longitudinal position of
the sensor)
󱢷󱢷
❶❶
󱢸
❺
❻
❹
󱢺󱢺
󱢷-1
2) Turn ON the power to the sew-
ing machine. Turn the pulley
counterclockwise by 45 de-
grees of an angle by hand.
(While the power to the sew-
ing machine is in the ON state,
the rotating hook shields the
laser. It is therefore necessary
to move the rotating hook to
such a position that it does not
shield the laser.)
Positioning point
󱢷-2
Adjust the position of the sensor so that the left end face of sensor ❶is aligned with left marker line
󱢷-2 of jig 󱢷. (Adjustment of the lateral position of the sensor)
After the completion of the adjustment, tighten screws 󱢸.
Irradiate the jig shaft with light from the sensor. Check the irradiation point by observing it from the
upper right side of the sewing machine. Tighten screws ❻when the sensor position allows the light
spot to be aligned with the positioning point on the jig shaft. In the case the light spot is not aligned
with the positioning point on the jig shaft, adjust the longitudinal position of plate A ❹.

– 8 –
󱢷-3
❷
3) Loosen screws ❷. Move sensor ❶in parallel
to the right side so that it is aligned with right
marker line 󱢷-3 on the jig plate.
Detach jig 󱢷. Attach an empty bobbin and
bobbin case.
󱢷󱢷
4) Check the status of the display on the right side of sensor ❶. Tighten screws ❷when the orange
light lights up and the displayed value is -0.5 to -0.8.
If the orange light goes out, finely adjust the position of sensor ❶to the left.
If the displayed value does not fall within the range of -0.5 and -0.8, finely adjust the position sensor
❶to the right.
Orange light lights up
Orange light lights up
❶❶
The three conditions must be satisfied.
①Green light lights up (always ON) / / ②Orange light lights up / ③-0.5 to -0.8

– 9 –
3-3. Setting the operation panel
❶
❷
A
B
C
D
1) Press "User param" ❶on the menu screen of
the operation panel.
The "User param screen" is displayed.
2) Press "Statistics setting" ❷.
The "Statistics setting screen" is displayed.
3) Set items Ato Das described below.
A: Operation is stopped after
the amount of the bobbin
thread detected by the
bobbin thread remaining
amount detection device is
lower than the bottom mark-
er line
→Yes
B: Setting of the bobbin thread
amount for the bottom
marker line is effective
→Yes
C: Bobbin thread amount at
the bottom marker line
counting method
→IN5
D: Remaining length of bobbin
thread at the bottom marker
line (mm)
→2000
Remaining length of bobbin thread at the bot-
tom marker line (mm) Dis required to be cor-
rected according to the longest seam length of
the sewing pattern.
Reduce the remaining length of the bobbin
thread by 100 mm as compared with the seam
length.