Jema JM-988 Product guide

INDUSTRIAL SEWING MACHINE

I.Overview
Automatic button feeding device is composed of feeding identification mechanism, pneumatic button transmission
mechanism, button rotating and falling mechanism, thickness measuring mechanism, gate adjusting mechanism, mechanical
arm button feeding device, thread loosening mechanism, as well as mechanical, electrical and gas part and control
mechanism. It can be compatible with different brands and models of button sewing machine, featuring quick button
feeding speed, high button feeding stability, small failure rate, significant reduction of labor intensity, inprovement of
production efficiency, simple operation, etc.
II. Technical Parameters
No. Parameter contents Standard range Remarks
Power supply voltage
Rated power
Package size
Weight
Rated button sewing speed
Continuous button feeding speed
Button feeding stability
Button diameter
Suggested air pressure
110/220V
260W
570 600 520MM× ×
48KG
19200-24000pcs/8h
28800-31200pcs/8h
99.7%
9-24mm
0.3-0.35Mpa
III. Safety Warning
1.Before installing and using this equipment, users must carefully read the relevant safety precautions, to ensure personal
safety and avoid equipment damage. The company will not bear any responsibility for any personal injury or equipment
damage resulting from failure to comply with the operational requirements of this instructions.
2.Before installation, be ensure the pressing foot working well at the highest area.
3.Before connecting the machine to the power supply, arrange the qualified professional electrician to check the power
supply voltage, frequency, power and other parameters are in line with the identifications of machine nameplate. The metal
casing of machine must be connected to the case of sewing machine using metal wire and then connected to the special
protective grounding wire using grounding wire.
4.During the repair or adjustment of device, cut off the power supply and gas supply to ensure safety.
5.Do not put hands on the moving parts of machine to avoid injury. The total intake source of compressed air should be
between 0.35 and 0.4Mpa.
IV. Introduction to Panel Functions
1
Language

In/Output
Indicator
light
Quantity
Vibration
Controller
Manual
Testing
Reset
Start
Stop
“Quantity”: It shows the current quantity; the quantity will be reset after pressing this key.
“Output/input indicator light”:Display the working indicator lights of all systems by pressing this key.
“Button feeding control/Vibration Controller”:Set the time of vibration, gear of vibration and speed
of button feeding by pressing this key.
“Manual testing”:Enter function page by pressing this key, select the function button that you want to test,
and make the machine run by pressing this key.
“Language”:Multilingual switch.
“Resetting”:Pressing this key for resetting when the system is giving an alarm.
“Start”:The machine will start working after pressing this key.
“Stop”:The machine will stop working after pressing this key.
2
Language
Mechnical
Feeding
Mechnical
Arm
Up&Down
Vertical
Shaft
Rotation
“Moving up and down of engine arm”: The engine arm will move up after pressing this key;
and the engine arm will move down after pressing this key again.
“Feeding button by engine arm”: Engine arm will rotate anticlockwise after pressing this key;
the engine arm will rotate clockwise after pressing this key again.
“Rotation of vertical shaft”: Vertical shaft will rotate after pressing this key.

Vertical
Shaft
Up&Down
To Clamp
Button
Baffle
Extension
Manual
Feeding
Switch
Blowing
Button
RETURN
“Moving up and down of vertical shaft”: The vertical shaft will move down after pressing this key and
the vertical shaft will move up after pressing this key again.
“Taking button by operating button clamp”: Button clamp will be unfolded after pressing this key and
the button clamp will be folded after pressing this key again.
“Stretching out and drawing back of damper”: The damper will stretch out to block the button
from moving, and the damper will draw back and button can freely move after pressing this key again.
“Manually feeding button”: The engine arm will feed button once after pressing this key.
“Feeding button by blowing gas”: Button feeding will be conducted once by blowing gas after pressing
this key.
“Back”: Return to the precious page after pressing this key.
J9 pressure regulating valve by gas blowing: When buttons are delivered to button feeding track at the vibrating plate,
feed the buttons at the gripper arm through gas blowing, and the recommended air pressure is between 0.3-0.35Mpa.
3
Manually Feeding: Press this key for manually repairing button when there is no button in the gripper.
Thickness Measurement: Pressing this key, lift the pressing plate for measuring thickness, take one button to
be used and place it on the plate, and then release this key.

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V. Introduction to Basic Operation
1.Start-up operation:
1.Check whether there are tools or foreign objects around the machine.
2.Connect to the gas source, adjust the pressure and ensure the value of pressure gauge is between 0.3-0.35Mpa.
3.After turning on the power, the button indicator lights at the panel will become green and function interfaces
will be displayed on the touch screen.
4.After pressing the resetting key, the machine will be restored to the original state, namely standby state.
5.After pressing the preparation key of sewing machine, the presser foot will be lifted, and the operation
screen will become green and the machine will enter standby state.
2.Original state:(standby state)
3.Button change operation:
1.Press the thickness measuring key (as shown in Fig.1), and then take one button to be used and put it below the pressing plate
for measuring thickness 、width and adjusting the blocker automatically.( as shown in Fig.2 3 4).
Fig.1 Fig.2
Fig.3 Fig.4
NO. Name of cylinder State
Name of
magnetic switch
Indicator light of
magnetic switch Remarks
Cylinder for making gripper
take button
Cylinder for making mechanical
arm move up and down
Needle protection sensor
Manually feeding button
Vice buttons sensor
Fold
At the up
position
It is on when there is
button
It is on
Putting on button
manually
1
2
3
4
5
6
7
8
X0(J2)
X1(J1)
X3(J7)
X4
X6
X7
X10
J28
Thickness measurement button
It is off
It is on
Home position
Correct degree position sensor
Correct degree position
Correct degree position

3. When change buttons, in order to feeding buttons correctly, according to the different size of button’s diameter
to adjusting the J1 sensor position. (as shown in Fig.5)
5
Fig.5
4.Conntect to the total intake air supply, adjust the pressure of gas pressure meter to be between 0.35-0.4Mpa.
(as shown in Fig.6)
Fig.6
Fig.7
Fig.8 Fig.9
5.After pressing the power switch, the power indicator light will be on (as shown in Fig.7), the touch screen will
display function page to adjust the speed of feed tray, so as to continuously feed buttons and make track full of buttons.
6. Lift the presser foot of button sewing machine, press the key “Manually Feeding button” .(as shown in Fig.8)
MANUALLY FEEDING

9.Main buttons & Vice buttons set : Large number of buttons for Main buttons through to the vibrate plate for feed.
Little number of buttons for vice buttons by manual feed.Before start,set the main buttons and vice buttons quantity.
Vice buttons set “0” means only one type buttons for work.(Fig.9)
7.Press the key “Manually Feeding button”, check whether the specifications of button gripper base are
appropriate, and replace it if the specifications are not appropriate.
8.Press the key “Manual testing” and then “Stretching out and drawing back of damper”. Stretch out the gate, and
adjust the gap between buttons to be 0.2-0.5MM.
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10.Pressing buttons area
Rubber nozzle Front guide block
Front guide block
Fig.(1)
Rubber nozzle
Fig.(2) Rubber nozzle
Fig.(3)
Fig.4 Fig.5
1.Original machine installed (1)Front guide block & (2)Rubber nozzle
2.Accessory packing with (1)Front guide block & (3)Rubber nozzle
3.Important note：
(2)Suitable for buttons size less than 15mm
(3)Suitable for buttons size over than 15mm or convex buttons
4.Suggestion collocation of above, please following the actual situations to change different size of front guide
block and rubber nozzle.
In order to press buttons stability and smoothly on the pin plate, plz use correct demensions of the pin plate for
buttons when replace the pin plate. (Important note. its the best size for the pin plate if all pins in the middle center
position of the button’s hole)
5.Loosen J10 throttling valve to increase the cylinder pressure, meanwhile, the pressing button motor will rise at a
higher speed, but the tightened cylinder pressure is decreased and pressing button motor rises at a slower pace.Fig4 5
6.Pressure control for the spring: For thin buttons, clockwise rotating the spring ,spring’s pressure became bigger.
For thick buttons ,anticlockwise rotating the spring, spring’s pressure became small. Important note : All based on
press buttons smoothly , stability, lower noisy as the standard.(Fig.6)
(6)
11.Press the key “Resetting” to restore the machine to initial state.

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Support button sewing machine second time and one time thread trimming function
4. Support second time thread trimming function:
VI. Button Sewing Operations:
Conduct Operations according to the instructions of button sewing machine.
VII. Troubleshooting
1.Buttons do not fall to the proper position
Solution:
1.Check the position of magnetic switch
2.Check the central position of rotating column and button feeding needle plate
3.Check the position of gate
4.Check whether the 24V input terminal of PLC is normal
5.Check 24V power supply
2. Do not feed buttons:
Solution:
1.Check the position of photoelectric switch X6 for automatically feeding buttons
2.Check the position of magnetic switch X0 for lifting engine arm
3.Check
4.Check motherboard-related input terminal
5.Check 24V power supply
the position of magnetic at origin
3. Vibrator does not work
Solution:
1.Check whether the vibration output power supply has voltage
2.Check 485 communication

Button sewing machine(JUKI type):1900 and 1903 series
Proper position for installation of sensor fixing support
Fig.1 Before the button feeder machine sensor is installed Fig.2 After the button feeder machine sensor is installed
Button sewing machine brother type/438D series 438FX siries
Fig.3 Electromagnet connector position(438D) Fig.4 Electromagnet connector position(438FX)
Fig.5 After the sensor is installed(438D/438FX)
Installation method:
the lowest level. Then install the button feeder’s sensor on to the screws. Adjusting to make the
distance between sensor and connector is 0.5mm(Fig.2).
Take the white fastener out of the machine (Fig.1), Adjust the trimming rod to
8
Installation method:
with the automatic button feeder’s sensor, then connect on the PCB.(Fig.3 4 5)
Before installation, pill out the electromagnet sensor wires, connect together

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Brother products: 438HS Series
Installation Position of Sensor Fixing Support
Fig.6 Installation Position of Button Sender Sensor
Installation method:
trimming connecting rod, install button attaching machine sensor in screw hole,
adjust the sensor and connecting rod until the spacing is 0.5mm (sensor light is on),
as shown in Fig. (6). Notes: Don't touch sensor for fear of any damage.
The red circle with the corresponding position of the first punch ,bottom out the
Fig.(7)438HS Electromagnet Socket Position Fig. (8) Installation Position of J28 Broken Needle
Protection Sensor (Protect the Button Attaching Machine)
Installation method:
before installation, pull out the pedal switch wire from socket, shear a red wire,
connect one end with J28 sensor wire and link up the other end with another J28
sensor (Fig. 8), wrap the insulated tape and insert the pedal switch in P8.
Find out pedal switch (Fig. 7) (P8 position) socket of button attaching machine

JACK (JACK) all-in-one machine
Installation Position of Induction Fixing Support
Fig. (9) Before Installation
Installation method:
tear down Fig(10), bottom out the trimming connecting rod, install button attaching
machine sensor in screw hole, adjust the sensor and connecting rod until the spacing
is 0.5mm (sensor light is on), as shown in Fig. (11).
Notes: Don't touch sensor for fear of any damage.
Pull down the back of the nailcatcher machine shell Fig(9),then Electric control
Fig. (10) Before Installation
Fig. (11) After Button Sender Sensor Installation
ZOJE all-in-one machine
Installation Position of Induction Fixing Support
Fig. (12) Before Installation
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JACK (JACK) all-in-one machine
Installation Position of Induction Fixing Support
Fig. (9) Before Installation
Installation method:
tear down Fig(10), bottom out the trimming connecting rod, install button attaching
machine sensor in screw hole, adjust the sensor and connecting rod until the spacing
is 0.5mm (sensor light is on), as shown in Fig. (11).
Notes: Don't touch sensor for fear of any damage.
Pull down the back of the nailcatcher machine shell Fig(9),then Electric control
Fig. (10) Before Installation
Fig. (11) After Button Sender Sensor Installation
ZOJE all-in-one machine
Installation Position of Induction Fixing Support
Fig. (12) Before Installation

11
Fig. (13) After the Sensor Installation
Installation method:
attaching machine until sensor light is on (Fig. 13) and sensor is not touched by trimming
iron (Fig. 14).
Dismantle the shell behind button attaching machine (Fig. 12), fix the sensor on button
Fig. (14) After the Sensor Installation
JACK and ZOJE split machine
Installation Position of Induction Fixing Support
Fig. (15) Before Installation Fig. (16) After the Sensor Installation
Installation method:
connecting rod, install button attaching machine sensor in screw hole, adjust the sensor
and connecting rod until the spacing is 0.5mm (sensor light is on), as shown in Fig. (16).
Notes: Don't touch sensor for fear of any damage.
Behind the nailcatcher machine shell down first (Fig.15), bottom out the trimming
Position for install the sensor(373D)
Fig.17 Before the 373D sensor is installed
Factory installed
Fig.18

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Fig.21 Before the sensor is installed Fig.22 After the sensor is installed
Proper position for installation of Vice button feeder sensor
Installation method:
Stepped on the pedal at the backward, move the sensor to make the lamp go out. tighten the screw. Fig.(21) (22)
First install the sensor fixing rack, then install needle protection sensor.
Fig.19 After the 373D sensor is installed
Installation method:
of the button attaching machine Fig. 17, then push the wire aside, connect the button feeding
sensor of the feeder with the wiper signal cable, then insert jack. See Fig. (19)( 20).
Installation method: Before installing, find out the trimming electromagnet
Fig.20 After the 373D sensor is installed

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Dahao system
(JACK, brother and ZOJE)
Installation position of J28 broken needle protection sensor
(protect button attaching machine)
Installation method( :
Connect J28 broken needle protection sensor to the pedal switch wire of button attaching machine, shear off one
red wire of pedal switch, connect one end with that of J28 sensor and link up another end with corresponding wire
of J28 sensor (Dahao system). Wrap the insulating tape around it.
Dahao system (JACK, brother and ZOJE )
Heavy machine
Installation method( :
Connect J28 broken needle protection sensor to the pedal switch wire of button attaching machine, shear off the
white wire of pedal switch, connect one end with that of J28 sensor and link up another end with corresponding
wire of J28 sensor. Wrap the insulating tape around it.
Heavy machine )
SUPU system : (373D)
Installation method(SUPU :
Connect J28 broken needle protection sensor to the pedal switch wire of button attaching machine, shear off one
red wire of pedal switch, connect one end with that of J28 sensor and link up another end with corresponding wire
of J28 sensor (SUPU system). Wrap the insulating tape around it.
(373D)

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15

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