Mitsubishi Electric MP-J25-PS User manual

INDUSTRIAL SEWING MACHINE
Attachment
MODEL
MP-J25-PS
TECHNICAL MANUAL
PERFECT STITCH UNIT
A180E845P01

FOR SAFE USE
Before the installation, operation, and inspection for this product, read the “FOR SAFE USE” and the
technical manuals carefully. Also read the other technical manuals, “Control Unit” and “Operation Panel”
describing some instructions, which are not in this manual, and use the sewing machine properly.
SAFETY INDICATIONS
DANGER
Indicates that incorrect handling may cause hazardous conditions, resulting
in death or severe injury.
CAUTION
Indicates that incorrect handling may cause hazardous conditions, resulting
in medium or slight personal injury or physical damage. Note that CAUTION
level may lead to a serious consequence according to the circumstances.
Always follow the instructions of both levels because they are important to
personal safety.
CAUTION INDICATIONS
No.
Caution indication
Description
1
Precaution for sewing machine operation:
Indicates that removing the safety and operating the sewing
machine for some other purposes with power-on are prohibited.
⚫Please do not operate the sewing machine without
protective equipment such as a needle guard, an eye guard,
a belt cover or the others.
⚫Please turn off the power switch when threading, changing
a needle and a bobbin, cleaning, and lubricating.
2
Caution for fingers injury:
Indicates a possibility of fingers (hands) injury in a certain
condition.
3
Caution for squeezing fingers:
Indicates a possibility of squeezing fingers in a certain condition.

SAFETY PRECAUTIONS
DANGER
To prevent from receiving an electric shock, always turn off a power switch and unplug power supply
when opening a control box, and then open after ten minutes passes.
CAUTION
USAGE ENVIRONMENT
Please do not operate the sewing machine under the following conditions.
(1) In the ambient temperature of 35 degrees (95°F) or more than 35 degrees, or the ambient
temperature of 5 degrees or less than 5 degrees (41°F).
(2) In the ambient temperature of 55 degrees (131°F) or more than 55 degrees, or the ambient
temperature of -10 degrees or less than -10 degrees (18°F) during transportation.
(3) In the relative humidity exceeding 85% or less than 45%.
(4) In the open-air place or the location that receives direct sunlight.
(5) In the place near heat sources such as heating devices.
(6) In the atmosphere filled with dust, explosive gas, or corrosive gas.
(7) In the place where the fluctuation in the power voltage of 10% or more than 10%, or the power
voltage of -10% or less than -10% of the fixed power voltage.
(8) In the place where the power source cannot supply enough voltage to keep the motor running.
(9) In the place filled with strong electric noises such as high-frequency welders.
INSTALLATION
(1) Please have some specialists, who have enough experience for the sewing machine installations,
install the sewing machine.
(2) Please have a qualified electrician perform necessary electric wiring.
(3) Please do not operate until the sewing machine is repaired when any damage or fault is found on
the sewing machine at the installation.
(4) Please do not refurbish the sewing machine.
(5) The sewing machine is heavy. For the safety, please make sure to install the sewing machine head
by more than one person.
(6) Please make sure to fit the safety protective equipment (the motor cover or the others) and the
accessory protective equipment (the eye guard) that removed temporarily for installation.

SEWING
(1) Please make sure to turn the power switch off before installing or replacing needles.
(2) Please pay attention for the fingers not to be injured by the needle point.
(3) Please make sure to turn power switch off before lubricating.
(4) Please pay attention that oil does not get on your skin or in your eyes as it may cause an
inflammation.
(5) Please make sure to keep oil out of the reach of children who may drink oil by mistake.
(6) Please make sure to turn the power switch off before threading a needle.
(7) Before starting the sewing, please make sure the position and the function of the halt switch.
(8) Please do not touch the operating parts during sewing operation.
(9) Do not operate the perfect stitch device that has been without safety device such as injury
prevention cover and area sensor. These are to be supplied by customer.
(10) Please make sure to turn the power switch off when stopping the sewing machine temporarily.
ADJUSTMENT
(1) Please make sure to turn the power switch off before adjusting the sewing machine.
(2) If the adjustment is required while the power switch on, do not step on the foot switch by mistake.
(3) Please be careful not to be injured by a sharp part such as the needle and the shuttle hook point.
(4) Please make sure to put the safety guards (eye guards, belt guards, link covers, and finger guards
or the others) back on the initial position after the sewing machine adjustment.
(5) Do not touch the clamp rotation mechanism that are the clamp, turn table and rotation drive unit
during the machine power ON.
To prevent the unexpected operation, do not move the clamp rotation mechanism by hand during
the machine power ON.

CONTENTS
1. STRUCTURE OF THE SEWING MACHINE····································
1
2. SPECIFICATIONS·····································································
2
2-1. Specifications······················································································
2-2. Positional relations of the machine and sewing area and clamp······················
2
3
3. INSTALLATION········································································
4
3-1. Removing the unnecessary work holder unit and cover component·················
3-2. Removing the various cover····································································
3-3. Installation of the rotation drive unit adapter················································
3-4. Installation of the support bracket····························································
3-5. Installation of the thread take up spring stopper···········································
3-6. Installation of the slide plate····································································
3-7. Installation of the support bracket·····························································
3-8. Installation of the base bracket································································
3-9. Installation of the perfect stitch unit
(Installation of the motor drive unit) ··························································
3-10. Installation of the perfect stitch unit
(Installation of the clamp rotating unit)······················································
3-11. Adjustment of the timing belt tension·······················································
3-12. Installation of the turn table unit······························································
3-13. Installation of the θaxis sensor unit·························································
3-14. Connection of the electric cables····························································
3-15. Installation of the θaxis motor cover························································
3-16. Installation of the XY cover····································································
3-17. Installation of the various cover······························································
4
6
6
7
8
9
10
11
12
14
17
18
19
20
23
24
24
4. INITIAL SETTING·····································································
25
4-1. Installation of the system ·······································································
4-2. How to operate jig clamp········································································
4-3. Initial adjustment of turn table home position···············································
4-4. Initial adjustment of rotation home position·················································
25
25
26
31

5. PROPER OPERATION (CLAMP ROTATION) ································
33
5-1. Outline·······························································································
5-2. Basic operation of clamp rotation ·····························································
5-3. Clamp rotation details············································································
33
33
36
6. MAINTENANCE·······································································
37
6-1. Cleaning ····························································································
6-2. Greasing·····························································································
37
37
APPENDIX 1. Program mode list
APPENDIX 2. Parts catalog
APPENDIX 3. Dimensional drawing of slide plate

- 1 -
1. STRUCTURE OF THE SEWING MACHINE
MP-J25-PS (Perfect stitch unit) consists of the following main parts.
<1>
<3>
<4>
<2>
<4>
<1>: Motor drive unit <2>: Clamp rotating unit <3>: Turn table unit
<4>: Jig clamp unit

- 2 -
2. SPECIFICATIONS
2-1. Specifications
Model
MP-J25-PS
Applicable model
PLK-J2516R-YU
Sewing area *1
X-direction (left/right) 140 mm
Y-direction (front / back) 140 mm
Maximum sewing speed *2
1,000rpm
Setting speed
10 speed levels in 200 rpm to 1,000 rpm
Work holder type
Jig eject system (Manual eject type)
*1: Sewing area stated on the basis of the area limit default value. For more details, please see next
section.
*2: Sewing speed may be limited by the operation or sewing condition.

- 4 -
3. INSTALLATION
CAUTION
(1) Please have some specialists, who have enough experience for the sewing machine installations,
install the sewing machine.
(2) Please have a Qualified Electrician perform necessary electric wiring.
(3) Please do not operate until the sewing machine is repaired when any damage or fault is found on the
sewing machine at the installation.
(4) Please do not refurbish the sewing machine.
Install this device according to following procedures. Attaching screws which explains this manual are
included in this devices package. Before installing, check if the sewing machine is in the condition suitable
for proper sewing.
3-1. Removing the unnecessary work holder unit and cover component
(1) Remove the needle and presser foot.
(2) Remove each four of M5 screw <3>, washers <4> and each four of M4 screws <5>, washers <6> then
remove the work holder unit <1>.
(3) Remove each two of M5 screws <7>, washers <4> and remove the feed plate <2>.
(4) Remove the air piping for work holder then, attach the plug to the solenoid valve. Plug is included in
this devices package.
<1>: Work holder unit <2>: Feed plate <3>: M5 screw <4>: Washer 5
<5>: M4 screw <6>: Washer 4 <7>: M5 screw
<1>
<2>
<7>
<4>
<3>
<4>
<5>
<6>

- 5 -
(5) Remove twelve of screws <2> and remove the slide plate <1>.
(6) Remove two of screws <4> and remove the mounting plate <3>. Remove the opposite side of
mounting plate by same procedure.
(7) Remove three of screws <8> and remove the X cover plate (right) <6>, X movable plate (right) <7>
and spacer <5>. Remove the X cover plate (left), X movable plate (left) and spacer by same
procedure.
Note These covers are needed to attach again after finish of installing the perfect stitch unit. However, X
cover plate (left and right) and screws <8> are needed to change to other parts which included in this
devices package. Please refer to the paragraph [3-16].
(8) Remove two of screws <10> and remove the cover <9> which attached on the bottom of machine arm.
<1>: Slide plate <2>: Screw <3>: Mounting plate <4>: Screw <5>: Spacer
<6>: X cover plate (right) <7>: X movable plate (right) <8>:Screw
<9>: Cover
<10>: Screw
<1>
<2>
<3>
<4>
<5>
<6>
<7>
<8>
<9>
<10>

- 6 -
3-2. Removing the various cover
(1) Remove the screws <4> and remove the each covers which are X-Y motor cover <1>, side cover <2>
and head cover <3>. These covers are needed to attach again after finish of the cable wiring.
3-3. Installation of the rotation drive unit adapter
(1) Remove four of screws <3> which fixing the digital tension unit <1> and install the adapter <2> with
four of screws <4>. Install the adapter <2> by referencing following figure.
<1>: Digital tension unit
<2>:Adapter
<3>: Screw
<4>: Socket bolt (M4X16)
<1>: X-Y motor cover <2>: Side cover <3>: Head cover <4>: Screw
<1>
<2>
<3>
<4> Twelve screws
Screw holes
<2>
<4>
<3>
<1>
Countersunk holes

- 7 -
3-4. Installation of the support bracket
(1) Remove the existing screws which fixing wiper unit. Install the support bracket <1> together with wiper
unit <2> with each two of screws <3> and washers <4>. Fix the support bracket and wiper unit with two
screws <5>.
(2) If not use wiper unit, in this case install the support bracket <1> directly to the machine head with two
screws <6>.
<1>: Support bracket <2>: Wiper unit <3>: Screw (Socket bolt M4X16)
<4>: Washer (Large washer 4) <5>: Screw (Socket bolt M3X6)
<6>: Screw (Socket bolt M4X10)
<3>
<1>
<2>
<5>
<4>
When the wiper unit is not used
<1>
<6>

- 8 -
3-5. Installation of the thread take up spring stopper
According to the following procedures, remove the existing thread take up lever stopper <1> and install
the stopper <4>. The stopper <4> is included in this devices package.
(1) Remove the screw <2> and remove the stopper <1>.
(2) Remove the thumb screw <10>, screw <9>, thread guide <8>, screw <7>, base plate <6> then, fit the
stopper <4> to the “A”marked portion of machine head and fix it with screw <5>. And then back the
base plate <6>, screw <7>, thread guide <8>, screw <9>, thumb screw <10> in order.
<1>: Stopper
<2>: Screw
<3>: Thread take up spring
<1>
<2>
<3>
<4>: Stopper <5>: Screw (SW-PW pan screw M4X8)
<6>: Base plate <7>: Screw <8>: Thread guide <9>: Screw <10>: Thumb screw
<10>
<9>
<8>
<5>
<4>
Completed
A
A
<6>
<7>

- 9 -
3-6. Installation of the slide plate
(1) Remove the needle plate <3> and two screws <4> from existing slide plate and install these parts to
the new slide plate <1>. By the same way, install the knurled knob <5> to the slide plate <1> with
screw <6>.
(2) Install the slide plate <1> to the machine bed with four screws <2>.
<1>
<2>
<5>
<6>
<3>
<4>
<1>: Slide plate <2>: Screw (Flat screw M4X8) <3>: Needle plate
<4>: Screw (Countersunk screw 3/32X2.8) <5>: Knurled knob <6>: Screw (Pan screw M3X6)

- 10 -
3-7. Installation of the support bracket
Notice The slide plate (large size) is not included in this device [MP-J25-PS package]. Please prepare it
by customer or purchase optional slide plate [material: glass epoxy resin] by referencing parts list at the
end of this manual. For details, please see slide plate dimensional drawing at the end of this manual.
(1) Install the support bracket right <1> with each two of screws <7> and washer <8>. By the same way,
install the support bracket left <2> to the opposite side of machine bed.
(2) Install the adapter <4> with screw <5> and washer <6>. By the same way, install it to the opposite
side.
(3) Install the stiffening plate <3> with two screws <5> and washers <6>.
<1>: Support bracket right <2>: Support bracket left <3>: Stiffening plate <4>: Adapter
<5>: Screw (Safety socket bolt M4X8) <6>: Washer (Large washer 4)
<7>: Screw (Safety socket bolt M6X12)<8>: Washer (Small washer 6)
<1>
<2>
<3>
<8>
<6>
<4>
<6>
<5>
<5>
<7>

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3-8. Installation of the base bracket
When install the base bracket <1> it is necessary to install without any twisting or inclining against the X-Y
table. To prevent the sewing defect and other abnormal machine behavior please install the base bracket
<1> by referencing following procedures.
Note Make sure if the X-Y table moves smooth and uniformly when move the X-Y table by hand before
starting the install operation. In this time, make sure if the X and Y timing belt tension is proper.
(1) Install the base bracket <1> to the shaft holder <2> and movable race Y <3> with each four of screws
<5>, washers <6> and screws <7>.
(2) Make sure if the X-Y table moves smooth and uniformly when move the X-Y table by hand. If there are
any discomfort moving described as below, it is necessary to loosen the screws <5>, <7> and adjust
the base bracket <1> position.
* The X-Y table become heavy during moving by hand.
* X-Y table cannot move in each direction independently. For example, the movable race Y <3> moves
slightly during the movable race X <4> moving by hand.
<1>: Base bracket <2>: Shaft holder <3>: Movable race Y <4>: Movable race X
<5>: Screw (Safety socket bolt M5X14) <6>: Washer (Small washer 5)
<7>: Screw (Socket bolt M4X12)
<5>
<6>
<7>
<1>
<3>
<2>
<4>
Y direction
X direction

- 12 -
3-9. Installation of the perfect stitch unit (Installation of the motor drive unit)
(1) Install the motor base support <1> and spacer <2> to the bottom of machine arm with four screws <3>.
In this time, fix the four screws <3> temporary.
(2) Attach the block <4> to the machined groove which has left side of machine arm with screw <5>.
When tightening the screw <5> tighten the screws <3> and screw <6> alternately.
(3) Check again each screws <3> and screw <5>, <6> tightened firmly.
<1>: Motor base support
<2>: Spacer
<3>: Screw (Socket screw M4X20)
<4>: Block <5>: Screw (Safety socket bolt M4X12)
<6>: Screw (Socket bolt M4X16)
<4>
<5>
<6>
<1>
<3>
<2>

- 13 -
(4) Install the motor drive unit <7> to the motor base support <1> with each two of screws <8> and
washers <9>. In this time, fix the screws <8> temporary because it is necessary to adjust the motor
drive unit <7> position later. In the other hand, please note that the timing belt <10> is not to be bend
until attach to the driven belt pully.
<8>
<1>
<10>
<9>
<7>
<1>: Motor base support
<7>: Motor drive unit
<8>: Screw (Socket bolt M8X40)
<9>: Washer (Large washer 8)
<10>: Timing belt

- 14 -
3-10. Installation of the perfect stitch unit (Installation of the clamp rotating unit)
(1) Attach the timing belt <3> to the clamp rotating unit <1> then, install it to the support bracket <2> and
adapter <5> which has machine head with two of screws <4> and each three of screws <6>, washers
<7>.
<1>
<2>
<4>
<3>
<5>
<7>
<6>
<1>: Clamp rotating unit <2>: Support bracket <3>: Timing belt
<4>: Screw (Button bolt M4X6) <5>:Adapter <6>: Screw (Socket bolt M4X12)
<7>: Washer (Large washer 4)