What is the reason for the slow ignition response of the TIG400 welder

Do you mean that the slow response refers to the arc, is there a high frequency?

Look at the welding machine, is there any air supply in advance?

1: The cable of the welding torch is broken. The micro switch is broken.

2.With or without a power input. 3.

Contact can ignite 4The motherboard is broken. It's simple.

In fact, you still have to test it yourself. I didn't know about your little TIG welding machine. Does the fan move.

Pressing the switch machine has no action. See if the high frequencies are available. These are all things to know.

There are so many reasons why you can't arc. Generally, I repair more because of the welding torch.

It is possible that the above situation will occur due to the defect of the high-voltage pack, but it is generally not a faulty high-voltage pack. TIG welding machine is not a simple welding machine with argon protection. In this case, on the one hand, the no-load voltage is low, and on the other hand, the capacitance capacity of the high-voltage arc striking loop may be reduced.

If there is no problem with the above, then the welder design is normal. Argon arc welding is the use of inert gas argon, when the melted flux is fused with the base metal during welding, in order to prevent the flux from being oxidized at ultra-high temperatures, inert gas (argon) is used to isolate the air, protect the solder joint, maintain the chemical composition, and thus protect its mechanical properties. Therefore, when the welding machine is designed and manufactured, there is a design delay, ventilate before the arc starts, and use argon to exclude other gases around the workpiece first, so as to achieve the effect of isolation protection, so there will be a normal delay, generally 1-2 seconds, and there are also settings of 2-3 seconds.

Look at the welding machine, whether there is air supply in advance.

1. Check whether the external power fluctuates greatly, 2Whether the ground wire is reliable to the workpiece.

3. It may be a problem with the welding machine itself.

Inverter welding machine current large fault analysis ideas.

The inverter welding machine controls the pulse width of the output waveform by controlling the control voltage of the PWM circuit, thereby controlling the output current. When the current is large and the fault is not adjustable, it should be checked from several aspects:

1. Poor contact or disconnection of the grounding terminal of the given current potentiometer;

2. If the negative feedback signal is lost, the check connection of the shunt is used, and the power supply of the Hall sensor is checked by the Hall current sensor, and the probability of damage to the Hall sensor is generally very small, but it cannot be absolutely ruled out;

3. The amplification circuit of the given signal or feedback signal is damaged, and the control signal input terminal of the PWM circuit remains unchanged no matter how the given potentiometer is adjusted.

It is rare for the PWM control chip to be damaged, and the output pulse width is still the largest despite the change in the input signal. However, it is necessary to consider models with poor isolation of feedback signals from output.

It could be that there is a problem with the welding current locator.

That's when the circuit board controls the valve relays (mostly relays) are broken.

There are two main reasons for not arcing. One is that there is no electricity in the main circuit. Second, there is no high frequency.

First of all, press the gun switch and listen to whether there is a rustling high-frequency sound, if not, it means that there is a problem with the high frequency. The high-frequency problem does not mean that the main circuit is good, so it is necessary to continue to detect, short the tungsten needle with the ground wire and then press the gun switch, which should be in working condition at this time. Adjust the current knob, the current should be continuously adjustable.

If it is not adjustable or there is no current, the main circuit is broken.

Have you turned off the gas test switch, if there is no fire, it is a problem with the welding machine, continue to check.

It seems to be a malfunction of the TIG welding machine.

The switch of the main circuit part of the control board, the triode or field tube that controls the gas valve relay is directly short-circuited, and the gas is straight-through, and the other circuits are gone.

1. First of all, check whether the input power supply is normal, whether the contactor or air switch is normal, see if there is a fault of disconnection in the internal main circuit, and if there is no problem with the main circuit, check whether the driving circuit of the control circuit IGBT is normal.

2. Determine whether the DC output of the 220V rectifier bridge is normal, and the normal should be around DC250V.

3. First disconnect the DC voltage of DC250V, measure the G pin of each inverter MOS tube, and see if there is a driving voltage? If there is, check the MOS transistor and output rectification fast recovery diode, if not, check the relevant circuit of the control board.

4. Check whether there is a short circuit in the rear stage of the welding machine, so that the whole circuit is protected.

5. IGBT is not broken down, and there are many reasons for no output, and the specific situation is analyzed on a case-by-case basis.

If there is electricity in the input and the welding machine is working normally, then it is necessary to see if the internal wiring points of the output have fallen off, or whether the external wiring screws have rusted. If the vibration of the welding machine is very light, and the vibration is not felt when the hand is placed on it, and the input voltage is normal, then it is necessary to consider the single fault of the machine.

I don't know what brand you bought, I used Huayilong inverter welding machine, and I used it for more than a year without any problem.

Check whether the IGBT high-frequency coupling transformer is normal.

1. Check whether there is normal voltage input in the mains.

2. Check whether the switch input has normal voltage input.

3. Check whether there is normal voltage from the switch output to the bottom plate connection column.

4. Test whether the resistance value of the four thermistors connected in series of the starting protection circuit of the bottom plate is within the normal range.

5. Open the silicon bridge socket, turn on the machine to see if the fan rotates, turn it to normal 6, plug in the silicon bridge wire, unplug the bottom plate and turn on the six-core wire on the upper plate to see if the fan rotates, turns into auxiliary electricity, and does not turn into a silicon bridge or capacitor short circuit.

What do you mean? Let's be clear.