Case Analysis Of Bao Max Maintenance (Four)

Case 1:

The scene phenomenon: on startup, it will report 11 fault codes or 11 fault codes in use.

Failure analysis: ERR-11, synchronous failure, electronic control system can not detect the needle stop signal.

First of all, it is a failure to start on a startup, or in the course of using it, there are times 11 fault codes.

If you start up, you will report 11 fault codes for three reasons:

The synchronous sensor can not sense the location of the magnetic steel of the stop needle.

2. Synchronous sensor is bad.

Synchronous sensor green red two lights no matter how to adjust the location of magnetic steel is not bright, replace synchronous sensor.

Circuit board failure.

Synchronous sensor green red two lights no matter how to adjust the magnetic steel position and replace synchronous sensor are not bright, replace servo electronic control box computer board.

If 11 fault codes are reported in the use process, there are two reasons.

Belt loosening.

Check whether the belt on the motor is loose or not and tighten it up.

2. There are stitches on the motor wheel or hand wheel.

Check whether there is a sewing thread on the motor wheel and hand wheel, and remove it.

Case two:

Troubleshooting for motor faults.

According to troubleshooting code maintenance, such as 13 failure code, check the motor encoder plate and encoder connection line is damaged.

In addition, it is possible to observe whether the grating is in the middle of the encoder components (after long running, there may be a pmission between the motor axes), and knock it right.

(2) report 08 fault code, which is abnormal for encoder components on motor encoder board.

Turn the motor belt wheel with your hand to see if there is any resistance to judge whether it is caused by bad insulation between the motors.

(3) report 01 fault code, use multimeter to measure phase resistance test to see if there is obvious imbalance. If there is, explain the short circuit between turns, you need to replace the motor.

(4) report 16 fault codes for motor encoder and grating fault.

5. When the motor is low speed, it has abnormal noise and excessive noise, indicating that the bearing is damaged and the bearing of both ends of the stator can be replaced.

Case three:

The scene phenomenon: a boot on the E-08 fault code, an occasional E-08 fault code.

Failure analysis: E-08, motor block failure.

Elimination steps:

First, determine whether the ER-08 fault code is reported on a machine, or use the ER-08 fault code after a period of time.

If it is a machine, it will report the ER-08 fault code. Please follow the following steps: first, check whether the electrical code line plug is connected to the computer box or check whether the plug is inserted; then, according to the instructions, measure the motor initial angle of the P46 parameter (see the instructions), do not replace the motor encoder again; finally, the controller fails, and the circuit board can be replaced.

If the ER-08 fault code is occasionally reported during operation,

First, judge whether the alarm is on the tangent line. First, check whether the location of the magnetic steel on the mechanical stop is factory value (proofreading), then resume the travel parameters according to the instructions P21 and P46 to measure the motor initial angle.

Second, judge whether the machine is stuck, pay special attention to whether the shuttle is stuck or not, and eliminate the machine fault.

Check the position of the tangent cam (adjusted to the factory value).

4. Alarm when making thick materials, adjust P01 to 201, or adjust the P03 parameters (as small as possible without affecting the speed).

If the above methods can not exclude faults, it may be a circuit board problem.

Case four:

Failure analysis: Err-16 failure, the machine can not work properly.

Elimination steps:

First of all, it is known whether it is a failure code to boot, or an occasional fault code.

1. If the machine starts to report failure, first test the initial angle of the motor (the initial angle of the test motor is changed to 0002 in the system parameter P46 to do the automatic test, see the instructions). After testing, check whether the monitoring parameter SP4 is around 200. If it is 0000, please replace the electrical encoder and retest the initial angle of the motor.

Secondly, it is necessary to test the initial angle of the motor first, and to see if the monitoring parameter SP4 changes greatly during the test. If there is a great change, it may not be a problem, but it still needs to be observed for some time.

If there is no further fault, it indicates that the motor angle is wrong before reprocessing.

If there will be any malfunction during the observation period, check whether the ground wire of external power is charged.

Because most factories do not install the normal grounding method to connect the ground, the live line will interfere with the normal use of the electronic control. In the absence of multimeter, the ground wire can be removed and observed for a period of time.

If there is no trouble again, the factory electrician can get the ground wire well.

If the above steps are not checked after checking, replace the control panel.

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The scene phenomenon: the display screen does not appear malfunction code, the machine can use, but does not have the cutting line and the reverse seam function.

Failure analysis: the machine can operate normally, indicating that there is no problem in the motor control loop.

Maybe there are some problems in the following aspects: the pedal does not give the signal for cutting the seam, the electromagnet connector is not connected well, the electromagnet power supply circuit is 24 volts without electricity.

Elimination steps:

1. Restore the motor to the factory settings.

If the machine's P46 parameter is set to 1, there is no seam cutting action. The factory settings must be restored first.

Second, step on the foot pedal, when the machine is running, press the seam switch to observe whether there is a seam action. If there is action, it can basically be judged as a pedal problem, adjust the position of the rocker arm to test it, or replace the pedal sensor.

(3) carefully check whether the connecting wires of each electromagnet are reliable, and use a multimeter to check whether the electromagnet is normal.

4. If all of the above aspects are excluded, then open the electrical control box, use the multimeter to measure the output of the 24 volts of the electromagnet power supply circuit board, or replace the test with a good circuit board.

If the judgement is a 24 volt PCB problem, the maintenance will mainly detect the safety valve and the 3842 chip.

Case six:

Scene phenomenon: no trouble code shows that the needle bar jitter is severe during stopping and shearing.

Fault analysis: belt is too loose, motor initial angle is not right, cut line angle is wrong.

Elimination steps:

First turn off the power.

(1) use fingers to press the belt outside the belt cover to see if it is too loose. This is mainly on the newly installed machine.

In addition, we should also pay attention to whether the belt pulley of the handwheel and motor is tangled.

Processing method: tighten the belt and remove the entanglement in the slot of the belt wheel.

2. When the thread is cut, the needle bar will shake after cutting the needle.

Processing method: compare the angle of shear line angle of P31 to P33 parameter.

Flat knife: P31-175 P32-60 P33-120

Round knife: P31-185 P32-50 P33-180

If the above operations fail to solve the problem, the initial angle of the motor should be detected at this time.

Change the system parameter P46-0000 to P46-0002 and enter the measuring angle according to P.

Into the monitoring parameter SP4-XXXX, it shows the actual value, for reference, and then step on the pedal.

The normal SP4- is about 260.

If the angle of the motor is re measured, it is found that the motor is swinging left and right, unable to complete 360.

At this point, turn off the power supply, remove the motor, turn on the motor rear cover, and notice if the grating behind the motor is loose.

Processing method: detect motor initial angle.

The grating is loosened and the grating is fixed again.

Where the grating appears loose, remove the reload and check the initial angle of the motor.

Note: because the position of the grating is moving, the angle between the angle and the 260 is a bit big, so the angle is needed after loading.

Case seven:

The scene phenomenon: boot screen display E-01 fault code, the machine can not work properly.

Fault analysis: E-01, hardware overcurrent fault, circuit board or motor short circuit cause system overcurrent protection.

Elimination steps:

First, determine whether 01 fault codes are reported for a single machine, or 01 fault codes after a period of time.

If it is the former, check the following items:

(1) there is no obvious component burning on the circuit board.

Check whether there is a short circuit in the IGBT of the control motor on the power supply part, and whether the resistance in series with the IGBT pipe angle is damaged or replaced.

Check whether the thermistor is damaged, and determine whether the resistance value is within the specified range (15~20 ohms).

If not, replace it.

Check whether the 2136 integrated circuit on the circuit board is damaged, and the damage is replaced.

After eliminating the electric plate problem, check whether the electrical resistance between the three phases of the motor is normal, or whether there is a three phase short circuit between the shell or phase, and change the motor.

Check whether the external voltage of the motor is too low, whether it is lower than the minimum voltage value of the product 170 Volts, or check whether the three-phase busbar capacitance is broken.

Check motor initial angle.

If it is the latter, it focuses on checking whether the current sensor of the power supply sometimes fails, and can be replaced directly.

When repairing the 01 fault, it is necessary to use multimeter to check whether the devices and parts mentioned above are within the prescribed limits. If not, the replacement can be made within the prescribed limits.

01 the faults are scattered. These are only the most common parts of the site.

Through these ways can not be excluded, please return to office maintenance.

Case eight:

PMXAH50-55 no shear line and no reverse seam.

Check the 32 volt switching power supply panel.

It is easy to see from the above methods that the whole system is divided into small parts of the circuit to find faults. First, add the working voltage or add a control voltage, then measure the fault loop. According to the voltage change of the working point in the loop, the fault point can be determined, and the components can be judged well.