Handheld laser welding gun welding head problem solving

Performance:

The motor overheats on the home page and cannot be soldered

Cause Analysis:

Thermal is not plugged in or damaged

Troubleshooting:

①At the same time, test whether the trigger signal is normal. In some cases, the aviation socket is loose, which will result in no two signals. The aviation socket is located 80cm behind the wire of the welding gun.

② Directly short-circuit the 5/6 pins of signal interface 1. If it is connected, the main board is fine, and continue to the next step.

③Measure the on-off of the safety lock clip to 5 feet

③ Measure the on-off between the copper nozzle and 6 feet. In some cases, the line is broken. You can use a multimeter to measure the on-off of the signal.

Manifestation:

  In the welding state, after pulling the trigger, the air is sent to the wire, and the red light is normally visible, but the laser cannot be emitted

Cause analysis:

Logically, the signal emitting the laser is also emitted when the air is out, when the laser does not receive the light signal (port failure) or when the laser has a problem

Solution；

(1) First exclude the presence of an alarm in the laser itself

(2) Where it involves normal after shutdown and restart, most of them may be resettable alarms of the laser itself, it is recommended to contact the laser manufacturer or monitor the internal alarm

(3) For whether the laser has received a trigger signal, two schemes to test

The simplest thing is to link the laser's monitoring software to see which signal is missing. In addition, the signal port of the signal interface three can be measured Typically, the laser emits light only when it receives an enable/PWM/analog signal, so we can measure whether the signal is emitted in the operating state

(Be sure to measure each port of the signal interface three when the air is out of the welded state)

Enable signal: 2/4 pin output 24V voltage

PWM modulation demodulation signal: 6/7 pin   Output voltage 24V

Analog signal: 4/5 pin equal proportional voltage, 10V at full power

If the above signal is normal and still does not emit light, contact the laser manufacturer to deal with it

If one of the enable/PWM has no voltage, it can be used together, such as PWM connecting the enable signal pin

If there is no voltage in the analog quantity and the red light is a line, return to the factory to repair or replace the motherboard

If there is no voltage in the analog, and the red light is a point, check whether the 15V switching power supply ± is reversed

④When welding aluminum and galvanized sheet, this material will damage the lens more easily than other materials, so the minimum power should be used for welding.

⑤The quality of the protective mirror also determines the durability of its use. It is recommended to use the original lens

⑥At high power, compared with low power, the loss of the lens will increase, which is an uncontrollable range

⑦ When the above can not be dealt with, you can replace the F200 focusing lens + lengthened and wide scale tube to reduce splashes (additional purchase is required)

7.In the welding state, the output is intermittent, and the wire feed/air is intermittent

Performance:

In the welding state, the output is intermittent, and the wire feed/air is intermittent

Cause Analysis:

Trigger button signal or safety lock signal lost

solution：

According to its operation logic, only when the [Laser Trigger Signal] and [Safety Lock Signal] are valid, the light will be emitted (the laser state is normal), and there is no alarm on the home page.

When the light is intermittent, check the above two signals through the monitoring page, which will disappear. For the disappeared signal, do the next monitoring.

If both signals are present

①Safety lock signal disappears

Clamp the safety lock clip directly on the scale tube to see if it is normal. If it is normal, it may be the cause of the plate. Some plates such as rust or oil will cause poor contact.

②The trigger button signal disappears

Try pressing the trigger button hard, if the signal flashes, there may be a bad trigger button contact, replace the trigger button (new and old models are not common)

③ Unable to detect signal loss

Because the refresh frequency of the detection page is much lower than the sampling interval of the chip, it returns to normal after an instantaneous disconnection, and the detection page cannot be seen in this case.

In view of this situation, short-circuit the 5/6 pins of the signal interface 1 to make the safety lock take effect, and then solder it normally to see if it will appear.

8.copper burner

Cause Analysis:

During the welding process, heat diffuses to the copper nozzle and causes damage. The processing process should first analyze the heat source, lens astigmatism, red light polarization or external material heat conduction.

solution:

Make sure before handling

①The red light is centered (polarized light will cause the light to hit the mouthpiece)

②Appropriate scan width (usually within 5, usually set to 3)

③The focus is 0 focal point (the scale tube can be set to 0)

1. First, emit light to the ground from a long distance, and check whether the copper nozzle is hot. If it is not hot, it means that the lens has no problem and there is no astigmatism. If it is hot, the damaged lens needs to be replaced.

2. If the welding is hot under the above normal conditions, it means that the material conducts heat during welding. In actual use, the outer corner copper nozzle is more likely to be damaged than the inner corner, and red copper copper nozzles can be used.

3. The welding method also affects the heat, try to weld the welding head and the material at 45°∠ welding

4. Highly reflective materials such as aluminum plates will also cause the copper nozzle to become hot, which is uncontrollable

9.After the power is turned on, the motor at the rear of the welding head whistles / the swinging red light is abnormal / overheating / the swing width cannot be adjusted

Problem phenomenon:

After the power is turned on, the motor at the rear of the welding head whistles / the swinging red light is abnormal / overheating / the swing width cannot be adjusted

Problem cause and solution:

The driver in the control box controls the motor to swing. When there is a signal error or the driver does not match the motor, the above problems may occur.

We should first check whether the wiring is normal, and then deal with the abnormal noise by adjusting the motor drive, as follows

①The terminal of the connecting wire between the driver and the motor is in poor contact (SUP20S model)

In the welding gun of SUP20S, the connection terminal is built-in. Poor contact may cause abnormal signal and cause howling. Try to unplug and plug again.

②There is an open circuit in the five-core aviation plug of the connecting line between the driver and the motor (SUP15S model)

On the welding gun of SUP15S, the motor signal and power supply are connected through the air plug interface (two black wires). The air plug interface should be disassembled to check whether the welding pins of the car are broken or soldered

③ Prerequisite: If the swing is normal, there is no red light flashing, and the wiring is confirmed to be OK, it means that the driver and the motor do not match or interfere

This occurs on newly installed equipment or equipment with a tip replacement and can be improved by adjusting the driven potentiometer.

Potentiometer position: Y-axis (left side of the picture below) from left to right above the plug, the seventh position

Adjustment method: Use a flat-blade screwdriver to screw in one direction under the power-on state. If there is no response after more than 10 turns, screw it back to reset, and then continue to screw in the other direction.

(If adjusting the seventh potentiometer has no response, then adjust the fourth one from left to right)