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Solutions of FAQ

Cleaning Parts Cleaning Times Remark
(1) Air filter of stop motor Once a week  
(2) Air filter of power supply box Once a week  
(3) Frame guide rails Once a week (before oil)  
(4) Needle bar case slide rails Before oil  
(5) Rotary hooks Before oil With a brush
(6) Thread take-up springs Every day  
Other parts Clean properly  

Cleaning instructions

Parts Times Remark
(1) Thread take-up lever gears Once a week, No.2 white oil  
(2)Connecting rod and front & rear metal parts Once a week, No.2 white oil  
(3) Needle bar case slide rails Once a mouth, butter  
(4) Needle bar sliding parts Once a week, No.2 white oil Remove cover plate of needle bar case
(5) Rotary hooks 1-2 times a week, No.2 white oil? Clean with a brush before oil
(6) Gears for rotary hooks Once per 2-3 months, butter Remove needle bar
(7) Driving chain Once a week  
(8) Main shaft of needle bar driver Once a week, No.2 white oil Remove cover plate of needle bar case
(9)Frame drivin rails Once a week, butter  

Unable to Start

Probable causes Actions
Belt is loose or broken Tighten or replace belt
Fuse for power or circuit blown out Check ampere capacity and replace fuse
Needle position signal or one-rotation signal is not detected Adjust needle position with wrench so that needle position LED come on
Frame limit switch is actuated Move frame to appropriate position
Abnormality warning lamp in drive unit is on Clean air filter
Incomplete contact of connectors in control box Securely couple connectors
Incomplete contact of connectors in main shaft drive motor control box Securely couple connectors

Color change incorrect

Probable causes Actions
Incorrect stop position Manually set main shaft to fixed position
Needle position and one-rotation signals are not detected Adjust needle position with wrench so that stop position indicating lamp comes on
Incorrect needle bar position Set position correctly
Incorrect take-up lever position Adjust take-up lever so that it coincides with others in position at fixed position
Relay or fuse for color change defective Replace relay or fuse

Upper thread defective incomplete

Probable causes Actions
Thread take-up spring incomplete contact Securely couple connectors
Tension base connector incomplete contact Securely couple connectors
Upper thread breakage timing contact incomplete Clean and adjust the upper thread breakage timing contact

Jump incomplete

Probable causes Actions
Connector incomplete contact Securely couple connectors
Fuse for jump circuit defective Replace fuse
Jump solenoid defective Replace solenoid
Needle bar driving block wear Replace needle bar driving block

Deformed design

Probable causes Actions
Frame drive belt is too tight Securely couple connectors
Frame guide rails are clogged with foreign materials Clean the rails
Frame drive circuit defective Replace
Memory plate defective Replace
Overall weight of the frame is excessive Decrease R, P. M
  • The machine doesn't detect after thread break.
    • First check whether thread break detect is set as yes in the parameter setting.
    • In parameter setting thread break detect has been set as yes. But after thread break in all heads, the machine still doesn't detect.

      Check the indicator LED of the main board:
      - D29, D30 for machine type 91
      - D16, D18 for machine type 95
      - L35, L36 for machine type 07
      - XJ, DXQD for machine type 08/18/28/X16/X26

      When the machine is under normal running conditions, D30 of machine type 91,D18 of machine type 95, L35 of machine type 07, XJ of machine type 08/18/28/X16/X26 should be flashing, and D29 of machine type 91, D16 of machine type 95, L36 of machine type 07, DXQD of machine type 08/18/28/X16/X26 should be lightening. Otherwise there must be problem with the main board and the main board needs to be changed.
    • When there is no problem with the above indicators

      Check the link between CZ018 (for 91/95)/ A8 plug (for 07)/ CZ0812 (for 08)/CZ5012 (for 18/28)/CZ669(for 158)/CZ609(for 108)/CZ709(for 118/128)/CZ7913(for X16/X26) and the thread detect board of the last machine head (3 position thread detect board is cZ1 and 2 position thread detect board is CZ011). If it's not linked, that means that signals are not transferred to the thread detect board and you should repair it to get link.
  • One machine head doesn't detect while others operate well.
    • There is problem with the thread detect board of the head which needs change.
    • Check the plug connection of CZ1 (3-position thread detect board) or CZ011 (2-position thread detect board).
  • Wrong alarm (indication lights of all the thread detect boards turn on when the machine runs for several circles.) The thread detect board is damaged. (the board number: DXYMB, EF104, EF119)
  • Thread breaks in one head and then all the thread detect board indication lights are on.
    • Check whether the 12V voltage is right. (When it is lower than 10V, the power needs to be changed.)
    • It can be caused by the thread detect board problem of one machine head. Remove the signal lines of the thread detect board one by one until you find the damaged board and change it.
    • Check according to I. 3 to see if the signal lines are in short circuit.
  • When one machine head repairs stitch after thread break, all the other indication lights are on.
    • Check the indication light D36 (for machine type 91)/D21 (for machine type 95)/L37 (for machine type 07)/FSW (for machine type 08/18/28). When the machine repairs stitch, these lights should be on. If not, the main board has problem and needs to be changed.
    • Check according to I.3 to see whether the signal lines are connected.
  • False alarm for bottom thread detect function If a certain needle of one head can't work and there is alarm, check first the small wheel of the needle position. If OK, pull off the connection cable between the head's bottom thread board and thread break detect board to see if there is still the false alarm. If no, the bottom thread detect board needs to be changed.

Malfunction Remove Guidance for BECS-09

Trouble phenomenon

Analysis and judge method

Remove method

Error message: E-64
Chain-stitch color-changing over limit

Check if the color-changing rheostat is connected correctly.
1 Check the voltage of the 2 terminals of the rheostat, see if it is 2.5V. Check the voltage of the middle terminal, see if it is between 0 to 2.5V. if not?
2 Rheostat position is not correct.

 

 

Fix the rheostat correctly.

 

In the color-changing menu set the rheostat to the current needle position rheostat.

Chain stitch color-changing over time

1 Shut the power, check if the machine run correctly under color-changing state.

Adjust the machine to run correctly.

2 Check if the looper driven servo motor work.(The looper can back to the origin in embroidering state.

Check the servo motor driver.

Error message : E-66
Chain stitch half rotate error

Check if the rheostat position is near the set position in the color-changing menu,

Set the value of the rheostat position according to its real mechanical position. Notice : the value of the A position rheostat should be 100(+/-1). If the value float above +/-2, place a 0.1 � capacitance between the middle terminal of the rheostat and ground.

Error message: E-67
Chain stitch needle position error

 

As above

 

As above

Error message : E-71
Thread-loosing motor run in counterclockwise direction.

Press the up button in the thread-loosing menu, see if the thread-loosing position change from 0 to 3. See if the value of the rheostat is getting bigger.

If thread-loosing position does not change correctly, change the wire connection of the motor to rectify its run direction.

If the value of the rheostat is getting smaller, change the wire connection of  the  rheostat.

Error message: E-72
Thread-loosing motor over time.

Check the thread-loosing motor, driver and mechanism, see if they run correctly.

Connect the signal wire  of the thread-loosing motor and the trimming motor to the x, y signal wire , move the frame by hand to see if the motor run correctly.

Error message : E-73
Thread-loosing position error

After check the thread-loosing motor run correctly,

In thread-loosing menu, set the value of thread-loosing rheostat to 30. After press 3 to confirm, set the value of the rheostat to this value.

Error message: E-74
Scissor can not reach its position.

1?Open the looper base cover check if  the proximity switch functioning, if not

Replace the proximity switch.

2?If the proximity switch function, see if trimming function is good with the looper base cover open, if not

looper base cover influence the proximity switch, mechanism adjustment is needed.

3?Others.

Adjust the trimming distance in trimming menu.

Error message: E-75
Trimming motor over time.

1  Check if the trimming motor work well. If not

Replace the stepper motor.

Check to see if the board BBQ2003 is over current and can work well. If not

Replace the driver BBQ2003

2  Check to see if the proximity switch is good. If not

Replace the proximity switch.

Error message : E-76
Looper shuttle position error
Error message :E-77
Looper motor over time

1 Check to see if the value of the servo motor parameter is set correctly.

If you select SANYO series servo motors and PY series drivers, set the parameter value according to the supplement debugging manual.

2 Check to see if the proximity switch work well. If not

Replace the proximity switch.

Error message: E-78
D shaft motor over time
Error message: E-79
D shaft motor position error

As above.

 

As above.

 

Error message: E-80
Needle height not the same

1?Select assistant mode, select the item 8 (needle height adjustment), to see if the heights of all the needles are the same.

In the needle height adjustment menu, select the current needle height, press “enter” to ensure the needles are all in the current height.

2?Check to see if the control software is the latest

Change the software to the latest one.

3?Check to see if the control software is the latest

Change the software to the latest one.

Error message: E-81
Board N communication error

1 Check to see if the linker between the main board and  E9511  is firm. If the insert-core of the linker damaged

Replace the linker.

2 Check to see if the communication cable is good. If not

Replace the communication cable.

3 Check to see if the switch DIP in E9511 is set correctly. If not

Change the setting.

4 Check to see if the control codes  correct. If not

Change the codes to the correct one.

5 Check to see if the wire connection of the power 12V and 24V of E9511 are correct, and if the wires damaged.

 

Replace the power wire.

6 Board E9511 damaged.

Replace E9511.

7 Main board damaged

Replace the main board/

8 12V  switch power supply of the E9511 damaged

Replace the power supply.

 

Error message: E-82
Board N busy

The deal method is the same as :Board N jump motor over time

 

Error message: E-83
Board N data error

The deal method is the same as :Board N communication error.

 

Error message: E-84

Board N jump motor run in the counterclockwise direction.

1 The motor run in the counterclockwise direction.
Check to see if the motor wire and the jump rheostat are connected correctly.

Change the wire connection.

2 Check to see if the jump rheostat is loose. If so

Firm the rheostat.

3 Rheostat damaged.

Replace the rheostat.

4 If the output motor torque is not big enough, the deal method is the same as: Jump motor over time.

 

Error message: E-85

Jump motor N over time.

Select assistant mode

1 If the motor does not run, check to see if the 24V power is well and if the power supply wires are connected correctly. If not,

Replace the power supply wire.

2 Something wrong with the 24V switch power. Check to see if the power board and   damaged. If so

Replace the switch power supply board or

3 Check to see if the connection of the motor is correct. If not

Correct the wire connection of the motor.

4 The motor run over its aim position. Check the wire connection of the rheostat and check if the rheostat damaged. If so

Replace the rheostat or its connecting wire.

5 The motor run over its aim position. Check to see if the rheostat is firm and if the value of the rheostat is correct according to the mechanical position.

Reinstall the rheostat.

6 The torque of the motor is not big enough. Check to see if it is overload. Check the set current in switch DIP, see if it is suitable.

Reset the current value set in switch DIP.

7 Check if the voltage of power 24V in E9511 is too low.(while moving the head , the voltagel should be no lower than 21V)
If it is too low

Enhance the voltage of the 24V switch power, of replace with more thick wire.

8 Check to see if the type of the motor is correct. If the motor is just the type, check if the motor is good(check if each phase resistance is good). If not

Replace the motor immediately.

9 Board E9511 damaged.

Replace board E9511.

Error message: E-86
Jump motor N switch damaged.

1 Check to see if the head switch board is damaged. If so

Replace the switch board.

2 Board E9511 damaged.

Replace board E9511.

Error message: E-87

Head N needle height error.

1 Select the assistant mode , select item 8(needle height adjustment) in the menu, to see if all the needles are in the same height.

In the needle height adjustment menu, select the current needle height, press “enter” to ensure the needles are all in the current height.

2 Select the assistant mode , select item 8(needle height adjustment) in the menu, to see if all the needles are in the same height.
3 Check to see if the rheostat and the connection wire are loose. If so

Fix the rheostat well.

4 See if the value of the rheostat in the needle adjustment item of the menu twinkles too frequently.

Replace the communication wires (the wire must be twisted-pair), or reduce the interference (such as the connect machine to ground well).

5 Check to see if the main board codes is the latest.

Change the codes to the latest one.

6 remove method is the same as: Jump motor N over time.

 

Error message: E-88
No available head

Select the assistant mode,

Select the head in the menu.

BECS-XX2/XX8 Error explanation

  • Error explanation

    • No.

    Error Code

    Error Explanation

    1

    Pull the bar before the confirm lamp lit.

    2

    Pull the bar to return when it returns to the end point.

    3

    No patterns in the memory.

    4

    The main shaft stops error.

    5

    The frame over limit.

    6

    Memory loss of the data process board.

    7

    Memory loss of the control board.

    8

    Stepping motor error.

    9

    Color changing over time.

    10

    Half return error.

    11

    Needle position error.

    12

    Main motor over time.

    13

    Color changing over limit.

    14

    The basic pattern properties error of the packed patterns.

    15

    No basic pattern of the packed pattern.

    16

    Thread catching not at original point.

    17

    Thread trimming not at original point.

    18

    Thread trimming over time.

    19

    E35

    Encoder abnormal

    20

    E48

    Open too much files.

    21

    E60

    Encoder abnormal

    22

    E61

    Disk is write-protected.

    23

    E62

    Over time.

    24

    E63

    File not exist.

    25

    E64

    Catalog full.

    26

    E65

    Disk full.

    27

    E66

    Disk error.

    28

    E67

    A target with this name already exists!

    29

    E68

    Illegal call.

    30

    E69

    Sector ID destroyed.

    31

    E70

    Sector not found.

    32

    E71

    Reset failed.

    33

    E72

    No medium.

    34

    E73

    Initialization error.

    35

    E74

    DMA malfunction.

    40

    E75

    DMA bound error.

    41

    E76

    Sector ID error.

    42

    E77

    CRC error when reading disk.

    43

    E78

    Parity error when reading disk.

    44

    E79

    FDC controller malfunction.

    45

    E80

    Tracking error.

  • Examine and Remove Methods of Solenoid Electric Leakage (Voltage Measurement)

    Solenoid electric leakage can easily be found in electric installation, it will cause the periphery boards destroyed directly with unknown reason. So, after electric installation, or at the time of on-site maintenance, the examination on solenoid electric leakage will be necessary.

    How to judge the solenoid electric leakage
    • Static state measurement

      After power on, take a multimeter (a digital multimeter will be better), make it at range of DC 20V, measure the voltage between 12V of switching power supply and the machine frame (earth). The value is UAB.

      • If UAB is less than DC 2V, then the solenoid has no electric leakage, and the machine solenoid installation is all right. (Note: Because the DC12V and the machine frame is not the same earth, even if the machine has no electricity, there still will be some stray voltage, but under 2V.)
      • If UAB is more than DC 2V, then it shows that the machine frame has DC voltage.
    • Dynamic state measurement
      • To measure the jump solenoid: pull the switch bar to stop when embroidering, measure as "Static state measurement" as above with multimeter at the moment of stop. If UAB is less than DC 2V, then the solenoid has no electric leakage, if more than DC 2V, it has.
      • To measure the thread-trimming and thread-holding solenoids: press "manual thread-trimming" key, measure as above when trimming thread.
    • Judge the range of solenoid electric leakage and the methods

      When measuring the voltage between the 12V of switching power supply and the machine frame (UAB) with multimeter, you can examine the change of the value of UAB to judge the type of the electric leakage solenoid.
      • Pull out of the 24V plug, which is the jump solenoid's power supply, and the thread -catching, thread -trimming and thread-holding solenoids plugs from the power board. If UAB>2V, then shows the solenoid has no electric leakage. It can only be short circuit between the DC voltage and the machine frame because of the poor insulation of the wires. Please check the wire. You can find the electric leakage point by exclusion method. If the voltage UAB is less than 2V, then it is the electric leakage point.
      • After solving the electric leakage may be caused by the poor insulation, insert the 24V plug which provide power to the jump solenoid, if now UAB is still less than 2V, then it shows the head solenoid has no electric leakage. If UAB is more than 2V, then, the jump solenoid has electric leakage. Under this situation, you can use exclusion method to take off the jump solenoid one by one, at the same time to examine the change of the voltage. When one jump solenoid was removed, and UAB changed, then it shows that it's the very jump solenoid that has electric leakage, please replace it, and go on, until UAB is all right.
      • After doing all things as (2) said, please insert thread -catching, thread-trimming and thread holding solenoids plugs in power board, do as (2) said to go on to find the electric leaked solenoid.

        When doing as above, please pay attention to the following:
        • Be sure to insert and pull the plug when power off.
        • Because it is live-wire work, so, when measuring the leaked solenoid, pay attention to safety to against the electric shock.

Malfunction Remove Guidance for BECS-91/95/XX2/XX8

About stepping motor driver

Trouble phenomenon

Analysis and judge method

Remove method

System warning:
stepping motor driver malfunction, or the frame does not move when push the “move frame” key.

1 Stepping motor driver over-current (red over-current indicator is light)
2 Power supply malfunction of Stepping motor driver, the fuse is broken.
3 The cable from Main Board to stepping motor driver is not all right.
4 Move frame in four directions : X+DR, X-DR, Y+DR, Y-DR, to see if the corresponding indicating lamp is light, if not then?
5 Mechanical malfunction.

Remove malfunctions, or replace the damaged parts or the driver.

Replace main board

Repair the machine.

Frame cannot lock up

1 Stepping motor driver MS-21 malfunction.

——Replace the stepping motor driver MS-21.

2 When it’s 5-phase stepping motor driver BBQ5203, please check the two terminals of the stepping power supply to see if it is AC100V or not.

——Check the fuse of the stepping power supply.

3 Measure the voltage between P1 and P2 of the 8P plug in the stepping motor driver to see if it is DC 140V.
Measure the voltage between P3 and P7 to see if it is AC 7V;
Measure the voltage between P4 and P8 to see if it is AC 17V. If not

Check the fuse on the power supply board in the stepping motor driver.
Replace the power supply board in the stepping motor driver.

Frame lose step
The movement is not continuous

Pattern out of shape

1 The cable from CZ7011 on Main Board  to stepping motor driver is not all right.
2 X-Axis or Y-Axis direction control board in stepping motor driver MS-21 damaged,
or stepping motor damaged.

Repair to make it reliable.

A.If pattern out of shape in X-Axis direction when embroidering, please cut the power off, then exchange the left signal plug and stepping motor plug with the right plug. Then power on to start embroidering, if the pattern out of shape in Y-Axis direction but not X-Axis, then shows that the original X-Axis direction control board in the driver is damaged, please replace it with a new one

B.If pattern out of shape in Y-Axis direction when embroidering, please cut the power off, then exchange the left signal plug and stepping motor plug with the right plugs. Then power on to start embroidering, if then the pattern out of shape in X-Axis direction but not Y-Axis, then shows that the original Y-Axis direction control board in the driver is damaged, please replace it with a new one
C.By doing as above, the pattern out of shape still in original direction, then maybe the motor malfunction, please replace with a new one.

Malfunction Remove Guidance for BECS-91/95/XX2/XX8

  • About jump solenoid

    • Trouble phenomenon

    Analysis and judge method

    Remove method

    All jump solenoids can not be locked, all needles come down

    Check to see if the 24VDC power supply is right or not.

    Repair the power supply.

    Check the voltage between the 2 terminals of the fly-wheel diode D2 on Thread Break Detecting Board with voltmeter of one head. Method: let the thread break detecting switch on one at down-position, lock up the head, pull the switch bar to start embroidering, the voltage should be 8V±5%, if not, then:

    Repair or adjust the rheostat W on Main Board.
    If it’s BECS-02/08/18/28, modify the jump solenoid’s parameters.
    If <8V±5%, please increase the value;
    If >8V±5%, please decrease the value.

    One head cannot be locked.

    1.Check the solenoid to see if it damaged.
    2.Check the dynatron on Thread Break Detecting Board to see if it damaged.
    3.Check to see if there’s something wrong with the installation between jump solenoids and needle bar driving slider.

    Replace or repair the damaged parts.
    Replace Thread Break Detecting Board

    +Re-install or repair the damaged parts.

    If jump solenoid electric leakage occurs, please refer to chapter 5.2.2 “Examine and Remove Methods of Solenoid Electric Leakage”

  • About floppy disk driver

    • Trouble phenomenon

    Analysis and judge method

    Remove method

    FDD indicator is always light when power on.

    1.The 34P FDD signal cable reversely connected.
    2.The FDD damaged.

    Repair or replace the FDD

    Cannot read patterns from floppy disk, or pattern reading error

    1 The format of the pattern doesn’t accord with system requirement.
    2 Poor compatibility of disk or disk damaged.

    Replace the floppy disk.

    3 The signal cable between FDD and Main Board damaged, or the power supply cable damaged.

    Repair or replace the damaged cable.

    4 The FDD damaged.

    Replace the FDD.

    5 The Main Board damaged.

    Replace the Main Board.

    6 Check the operation box to see if there is some distortion, which lead to the FDD installation position changed.

    Take down the FDD, reinstall it, and adjust to make it horizontal.

  • About thread- trimming system

    • Trouble phenomenon

    Analysis and judge method

    Remove method

    Thread-trimming does not function

    1 Measure the DC voltage between the P2 and P3 of CZ3 on the power supply board with the multimeter. The normal value is DC90V±10%, if abnormal?

    Replace the Power Supply Boa
    The bridge rectifier B1, the capacitance C1, C2(4700u), the white cement resistance R19 -R21 damaged. Please replace the damaged components.

    2 Trim thread in manual mode, and observe the indictor on Main Board to see if it is bright. If not, then shows that the Main Board fails (no output signal).
    If bright, then check the cable from Main Board to Power Supply Board.

    Replace Main Board

     

     

    Replace or repair the damaged cable or connectors.

    3 Check the position of solenoid tray to see if it all right.

    Adjust the position to make it suitable.

    4 Check the thread-trimming solenoid to if it is all right.

    Replace the thread-trimming solenoid

    5 Check the relative cables and connectors to see if it is all right.

    Reconnect them.

    6 Check the dynatron on Power Supply Board with multimeter when power off to see if it is all right, if not,

    Replace with another dynatron of this type.

    7 If it’s Stop-to-Trim mode. Then check E734 board, if the trimming solenoid does not function.?

    Replace the power supply board E734.

    Thread-catching does not function

    1 The judge and remove methods are the same as above. The resistance value of the thread catching solenoids in parallel connection is more than 5O. The indicator of thread-catching solenoid is L34 (GX). The MOS on power supply board are M1, M2, M3 and M4.

    Repair or replace the damaged part(s).

    2 If thread-catching by motor, then check E733 board. If thread-catching not function. ?

    Replace the power supply board E733.

    Thread-catching or Thread-trimming position error

    Check the thread-catching (or thread-trimming) proximity switch with one metal piece, and observe the GXJC (or JXJC) indictor to see if it is bright, if not, then

    Check the connection of proximity switch to make it all right.
    If the connection is all right, then replace the proximity switch with a new one.

    Thread-holding does not function

    1 Measure the AC voltage between P4 and P5 of CZ6 on power supply board with the multimeter. The normal value is AC 63V, if abnormal?

    ——Check the power supply voltage.
    ——Check if there are some loose connections.
    ——Replace the transformer.

    2 Measure the DC voltage between P2 and P3 of CZ3 on the power supply board with the multimeter. The normal value is DC 90V±10%, if abnormal?

    ——Check if the connectors are loose or not.
    ——Replace the power supply board.

    3 Check the cable from Power Supply Board to thread-holding solenoid to see if it all right.

    Repair to make it reliable.

    4 Check to see if there’s any short-circuit between the lead wire of thread-holding solenoid and machine frame with mutimeter.

    Check each thread-holding solenoid one by one, if any short-circuit exists, please replace the solenoid

    5 Check the thread-holding indictor KX on Main Board to see if it is bright. If not, then Main Board fails (no output signal).

    Replace the Main Board.

    6 Check the dynatron on Power Supply Board with multimeter when power off to see if it is all right, if not

    Replace another dynatron of this type.

    7 Check to see if the connection between the power supply board and the main board is all right

    Repair to make it all right.

  • About operation box

Trouble phenomenon

Analysis and judge method

Remove method

LCD doesn’t display

1 Measure the 5V output of switching power supply to see if it is all right.
2 Measure the 220V AC power supply to see if it is all right.

——Make the connection reliable.
——Replace the switching power supply.
——
Check the machine power supply.

3 Check to see if the cable from 5V regulated power supply to Signal Transfer Board is all right.

Repair to make it reliable.

4 TO check the connection between Main Board E808, E850, E840, E860, E870 and LCD Signal Transfer Board to see if it is all right.

Repair to make it all right.

5 LCD has no background light.

——Check the two terminals of inverter to make the connection reliable.
——Replace the damaged Inverter Board with a new one.
——Replace the LCD with a new one.

6 Check the Main Board E9501, E808, E850, E840, E860, E870 to see if it is all right.

Replace Main Board with a new one.

7 Check the Signal Transfer Board E852 to see if it is all right.

Replace Signal Transfer Board with a new one.

8 Check to see if the connection between the two terminals of the 40P cable on LCD Signal Transfer Board is all right.

Repair to make it all right.

Display stripes on the screen, or screen blinking.

1 Check to see if the cable from operation box to LCD screen is all right.

Repair to make the connection reliable.

2 LCD screen damaged.

Replace the LCD with a new one

3 Interference

To find the interference source.
1. Make the connection from motor cover to machine frame reliable
2. Make the connection from motor cover to the grounding terminal of stepping motor driver reliable
3. Check each solenoid to see if electric leakage happened. (Please refer to chapter 5.2.2 “Examine and Remove Methods of Solenoid Electric Leakage”)

Malfunction Remove Guidance for BECS-91/95/XX2/XX8

  • About power supply

    • Trouble phenomenon

    Analysis and judge method

    Remove method

    Air Break Switch Broken

    1    Due to the imbalance of 3-phase power inlet, the current suddenly increased, then the overheat protection of air break switch functioning.

    Adjust electric network voltage to make it in standard range.(±10%)

    2    There’s a 3-phase 3-wire RCD (residual current device) in power supply circuit.

    Replace it with a 3-phase 4-wire RCD, or remove it.

    3    Lack phase of 3-phase power supply of main shaft motor.

    To check by getting rid of the load (including power supply transformer, servomotor driver, and servomotor)

    4    Machine overload (mechanical transmission system over damping)

    Check the relative mechanical parts, and adjust the mechanical transmission system.

    5    Short circuit happened between windings of main transformer in power supply box.

    Replace transformer.

    6    Release malfunction

    Replaces release.

    7    Emergency stop switch haven’t reset.

    Turn the emergency stop button clockwise to reset.


  • About main shaft motor

    • Trouble phenomenon

    Analysis and judge method

    Remove method

     

    Error displaying:
    MAIN MOTOR OVERTIME!

     

     

    1 Check to see if the power inlet lack phase, if so?

    To measure the voltage of input power with voltmeter and repair.

    2 Air break switch protection functioning.

    Shut off first to examine if the power inlet lack of phase, or if the motor overloaded, then power on again.

    3 Servomotor driver error

    To check the cable between the connector CZ706 on main board and the servomotor driver to see if well connected.

    4 Servomotor driver damaged

    To see if the parameters of the servomotor driver is right. You can replace the driver by looking up the driver’s maintenance manual according to the displaying error code

    5 Main shaft motor damaged.

    Replace the main shaft motor.

    6 machine malfunction:
    Up shaft blocked
    Down shaft blocked
    The belt of main shaft is broken or loose.

    Turn off the power, then rotate the main shaft with handle, check the malfunction point. 
    Replace the belt.

    7 The 3A fuse pipe on the main shaft control board is broken? If so,

    Replace the fuse.

    8 To check if the connectors are joined reliably, if there are some pins damaged?

    To repair or replace the pins

    9 If the main shaft control board failure.

    Replace the main shaft control board.

    10 Main board failure

    Replace the main board.

    The electromagnetic driven main shaft slow start speed is 80 rpm, if less than 80 rpm.

    Adjust the rheostat VR2 clockwise on the main shaft control board to achieve 80 rpm.

    The electromagnetic driven main shaft slow start speed is 80 rpm, if more than 80 rpm

    Adjust the rheostat VR2 counterclockwise on the main shaft control board to achieve 80rpm.

    The electromagnetic driven main shaft speed is less than the setting Max. Speed of 700 rpm.

    Adjust the rheostat VR2 clockwise on the main shaft control board to achieve 700 rpm.

    The electromagnetic driven main shaft speed is more than the setting Max. Speed of 700 rpm.

    Adjust the rheostat VR2 counterclockwise on the main shaft control board to slow down to 700 rpm.

    Notes: Rheostat VR3 is set to standard value in the factory, so any adjusting of VR3 is forbidden.  The VR3 has been replaced with precise resistance on the Main Shaft Board MCB-4 and MCB-5.

    Electromagnetic main shaft motor climbing

    1 Adjust the rheostat VR1 counter -clockwise on the main shaft control board.

    The default value of VR1 is 30K (the resistance value between pin2 and pin 14 of chip U2). Please measure this value after power off.

    2 If the machine still has trouble after the above adjustment, you should check to see if the capacitance C6 on the main shaft control board is wrong? ?

    Replace capacitance (C6 is 2.2uF/35V tantalum capacitance)

    3 To check whether the bolt connecting the shaft and the encoder loosed?

    To screw the bolt tightly at the 0 degree.

    4 Check to see if the mechanical transmission part is normal? ?

    Adjust the belt or the chain.

    5 The main shaft control board has some problems.?

    To replace the MCB board.

    6 f the machine is still climbing after the above operation, then check to see whether the brake sheet of main shaft motor is damaged, If so?

    Replace the brake sheet.

    7 The parameters of type BECS-95/XX2/XX8 also can be adjusted.?


    Enter assistance mode by keyboard, then, change the setting of "SET BREAK PARA." and "MAIN MOTOR PARA". The greater the BREAK PARA. Value, the further the stop position behind, and the less, the further ahead.

    Servomotor Driver

    1?Check to see if something wrong with the cable between the main board and the servo controller. If so?
    2?Look up the servo control system maintenance manual according to the error type.

    Replace the damaged cable.

    The red indicator lamp of AC Induction motor controller (FV-01) lights up to alarm.

    1?Check to see if the input voltage of the controller is normal. ?
    2?Check to see if the cable between the main board and the controller is all right. ?
    3?Interference

    Standard voltage:220V±10%

    Replace the damaged cable.

    Be sure the FV-01 is grounded well. It’s suggested that connect the shells of the FV-01 and the motor to reduce the interference to the system.

    4?The controller of FV-01 failure

    Replace FV-01.

    Main shaft can not stop at 100 degree precisely

    1 The set screw connecting the encoder with the main shaft loose.

    Adjust the machine to make the main shaft stop at 100 degree. Adjust the encoder, when the character which displaying 100 degree in computer do not blink, then tighten the set screw.

    2 Parameters error

    Enter parameter setting menu, to modify the “Set shaft brake parameters”
    If the cursor at 102.5 degree when stop, reduce the value of parameter.
    If the cursor at 97.5 degree when stop, increase the value.
    (Note:initialized value is 5)

    Main shaft run over

    1 If it’s BECS- XX2/XX8, please enter the encoder testing menu to check the APL, BPL, 0PL to see if it is right.

    0 encoder pulse
    0PL=14
    Continuous encoder pulse
    APL=1000
    BPL=1000

    Replace the encoder

    Check to make it connect well.

    Replace the main board .

     


  • About color-changing system

    • Trouble phenomenon

    Analysis and judge method

    Remove method

    error displaying

    color-changing over limit

    color-changing over time

    half rotation abnormal

    needle position abnormal

     

    1 Check to see if the “half rotation” indicator and needle position indicator on Needle Position Board are lit or not. If not,  please check the 12V DC switching power supply, if no output, then ?

    Replace the switching power supply

    2 Check if the connector on Needle Position Board well fixed or not, if the pins damaged, then ?

    Replace the damaged pin.

    3 Open the machine cover over Needle Position Board to see if there’s something wrong with the mechanical parts, if so, then ?

    Adjust the mechanical parts.

    4 Check to see if the needle position indicator changes by rotating the motor and the connecting rod with handle. If the indicator does not change, or does not display right, then, the Needle Position Board damaged. ?

    Replace the Needle Position Board

    5 To check the power supply board to see if the fuse is broken. The power supply board are: E9102 of Type BECS-91/95/XX2; 6BPB, E733, E734 of Type BECS-XX8?

    Replace the fuse.

    6 If the color-changing motor heating-up, and not run well, then something wrong with the Power Supply Board, ?

    Replace the Power Supply Board E733.

    7 When the color-changing is rheostat mode, and color changing failure, then check to see if the rheostat is damaged or not. ?

    Replace the rheostat.

    8 Check to see if Encode Board (EF119) is damaged or not. ?
    9 To check Board E9505 or Board E721?

    Replace the EF119 board.

    Replace the E9505 or E721 board.

    Change color clockwise, but not counterclockwise

    Check the plug & cable between the main board and the power supply board to see if it’s damaged. Check CZ021 on Power Board E9102; Check CZ1 on 6BPB; Check CZ332 on E733, and check CZ342 on E734.If damaged?
    power supply board failure ?

    Replace the plug and cable

     

     

     

    Replace the power supply board.

    Change color counter -clockwise, but not clockwise

    Check the plug & cable between the main board and the power supply board to see if it’s damaged. Check CZ021 on Power Board E9102; Check CZ1 on 6BPB; Check CZ332 on E733, and check CZ342 on E734.If damaged?
    power supply board failure ?

    Replace the plug and cable

     

     

    Replace the power supply board. Note: new power supply board has replaced the solid relay with discrete cell.

    Change color both clockwise and counter –clockwise, but over-limit each time

    To check the diode D1 and D2 on Power Supply Board E9102; check the diode D7 and D8 on 6BPB; check the diode D3 and D4 on E733; and check the diode D1 and D2 on E734. ?

    Replace the damaged parts.
    Replace the power supply board.


  • About thread break detecting system

    • Trouble phenomenon

    Analysis and judge method

    Remove method

    All heads do not detect.
    (Note: if one head set as boring state, then if has no thread break detecting function.)

    1?Check to see if has set thread break detecting function in menu?
    2?Check the Thread Break Startup indicator and spring switches indicator on main board to see if the signal all right. The Thread Break Startup Indicators are: D30 of BECS-91, D18 of BECS-95, DXQD of BECS-XX2/XX8. The spring switches indicators are: D29 of BECS-91, D16 of BECS-95, XJIA in main board of BECS-XX2/XX8. If the indicators cannot light up?
    3?Main Board has malfunctions.

    Set the menu right, or replace the damaged parts.

     

     

     

     

     

     

     

    Replace the Main Board.

    4?Check with voltmeter to see if  the 12VDC power supply of Thread Break Detecting Board is right,  if not ?

     

    Replace the power supply.

    When one head is embroidering, all the red indicators on Thread Break Detecting Boards are bright.

    1?Check to see if the 12VDC power supply is right?
    2?Check to see if there’s some short-circuit between Encode Board and Thread Break Detecting Board?
    3. Encode Board DXYMB? EF104 damaged,
    4. The Under Thread Detecting Board on one head damaged.

    Replace or repair the damaged parts and power supply.

    Replace the Encode Board EF104

    Get rid of the Under Thread Detecting Board one by one. If the malfunction vanished when remove one, then this damaged, please replace by a new one.

    When mending, all the other red lamps on Thread Break Detecting Boards of other heads are bright.

    Check to see if the FSW indicator on Main Board is bright, the indicators are: D36 of BECS-91, D21 of BECS-95, and PSW of BECS-XX2/XX8.if not, then?
    If bright, check to see if the signal cable between the socket on Main Board and Encode Board EF104 or 3-position thread break detecting board is right or not. If not, ?

    Repair the damaged parts, or replace the Main Board.

     

     

    Repair the signal cable.

    The red indicator lamp on Thread Detecting Board of one head does not lit when thread break, but the other heads’ red indicators lamp lit.

    1?Check to see if the Encode Board fails.
    2?Check to see if the Needle Position Board fails.
    3?Check to see if the cable from Encode Board to Needle Position Board, and the cable from Encode Board to Thread Break Detecting Board, are correct. If so, ?

    Repair or replace the damaged cables, parts, or boards.

    Non-regulation thread break detect. (That is, do not detect when thread break happened on one head, meanwhile the other heads wrongly detected, so cause abnormal to the machine.

    1?Check to see if the 12VDC power supply is correct?
    2?Check to see if the connectors on boards are well?
    3?Check to see if the Encode Board is correct.
    4?Short-circuit in the 20P cable.

    Repair the damaged parts, or replace the Encode Board.

     

     

    Replace the 20P cable.

    The red indicator of one head often lights up when embroidering, so cause abnormal to the machine.

    1.Something wrong with the Thread Break Detecting Board EF120 on this head.
    2.Something wrong with the Under Thread Detecting Board EF103 on this head.
    3.The under thread detecting wheel is not sensitive

    Replace Thread Break Detecting Board EF120

    Replace Under Thread Detecting Board EF103.

    Adjust the mechanical detecting wheel.

    Thread break ratio too high

    1.Electric leakage happened.
    2.Something wrong with the machine.

    1.Connection from motor cover to machine frame should be reliable.
    2.Connection from stepping motor cover to grounding terminal of stepping motor driver should be reliable.
    3.Check each solenoid to if electric leakage happened. (Please refer to chapter 5.2.2 “Examine and Remove Methods of Solenoid Electric Leakage”)
    4.Check relative mechanical parts.


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