Guangzhou EACO Welding Equipments Manufacture Blog

Gas delivery problem. If the gas is turned on, the tank is full, and the flow rate is adjusted correctly, check the hose for kinks or leaks that could reduce the flow to the nozzle. Make sure all connections are tight and that gas is not leaking anywhere. Spraying soapy water on the connections can help you find leaks. Too much gas This can also be a problem if the gas is flowing too fast, as it can create turbulence. If the gas flow is too fast, the current can break the weld pool and cause pinholes or cracks. It's like the wind making waves on a lake. This is primarily a problem with aluminum. The gas is contaminated with moisture. If the gas cylinder is not handled properly, moisture can mix with the shielding gas. This is rare, but does happen from time to time. Make sure the gas company has properly cleaned the bottles and filled them with welding grade gas. Airflow or wind Fast moving air can disrupt the flow of shielding gas and cause oxidation. tIG welding is best done insi...

TIG welding is a great way to join metals and it produces beautiful welds. However, if you are not careful, pinholes may appear in the weld path of   TIG welding . How to stop pinholes when TIG welding?The best way to prevent pinholes when TIG welding is to avoid some common causes, such as ✱ The shielding gas does not protect the bead ✱ Part of the weld is contaminated ✱ Amperage is set too high ✱Welding arc is too long ✱You are pushing the bead too fast ✱The current cuts off too quickly at the end of the weld Any one of these problems is easy to fix if you know what to look for. Gas problems The high temperatures in TIG welding can cause the weld to oxidize in the air. The torch provides a shielding gas that protects the weld from oxygen when it is extremely hot. If the gas is not distributed correctly, pinholes and cracks can result. What can destroy the shielding gas? The gas is not turned on. We've all done this before. If the gas is not turned on, the arc will produce more s...

One of the biggest benefits of having a foot pedal and control amplifier is that you can pulse weld manually. If you do not have   a TIG machine with the pulse option , do it yourself. Press and release, press and release at a steady rate and you are pulse welding. By laying it down, you can reach the peak amplifier. Then, by backing off, you lower to the base amplifier. However, it does take some practice to get the timing and pressure consistent. Being able to pulse is useful if you are welding very thin metal, and you can adjust your pulse with the foot pedal.   Limitations of the foot pedal If you do not have a machine capable of high frequency TIG, you cannot use a foot pedal. If you have a multi-process machine that can do TIG, but it only lifts arc TIG (like all UNIMIG multi-process machines), you cannot use a foot pedal. You can't use foot pedals because they act similar to the buttons on a high-frequency flashlight - press them once and the arc will automatically igni...

The foot pedal or foot controller can be used to control the current intensity of the welder while welding. Weld overheating? Release the pedal and lower the amplifier to allow the weld to cool. The foot pedal gives you full control without having to stop and readjust during the weld. They should only be used when TIG welding , since stick welding uses welding pliers instead of a torch and the current intensity of the MIG depends on the wire feed speed. This is no big deal considering that TIG usually requires more control over low amperage on thin metals.   Why do I need a foot pedal? TIG welding can often seem quite daunting at first. Especially if you have a dedicated  TIG welding machine  with a hundred little lights, options and settings. Okay, not that many, but the little pyramid of welding parameters on your TIG welder can be overwhelming. If TIG is already in the minority, why on earth would you use a foot pedal to add another variable to the mix? Since the inter...

Pulse welding focuses the arc and makes the weld path smaller, so it stays in place. It's not only easier to control, but you still have full penetration. The puddle freezes as you enter the basic amp portion of the pulse cycle, and the cooling at that moment helps the weld to level out. The longer you spend on the background amplifier, the better the "puddle freeze" effect, which is what creates the appearance of a stacked dime. Pulse welding also completely eliminates spatter, so you don't have to do any post-weld cleanup.   When should we pulse weld? ❉ Stainless steel, aluminum and other highly thermally conductive metals Pulse not only helps prevent sheet metal distortion, but is often used with known heat sink metals. Cooler welds provide all the penetration needed without exploding the metal with excessive heat. ❉ Misalignment Welding The cooling of the puddle makes it smaller meaning it is less likely to drip. If you weld misaligned, the use of pulses will keep...

Pulse welding is a form of welding in which the amperage alternates between high and low points. It keeps the overall heat input to the weld low, while still achieving the proper depth of melt. Its pulse frequency, what the peak amperage is, what the base amperage is, and how long it spends at either amperage setting can all be adjusted to fit the weld you are making.   Pulse Percentage (%) The pulse percentage is the amount of time each pulse spends in peak and base amperage. If you set the percentage to 50%, this means that 50% of the pulse period will be peak amperage and 50% of the pulse will be base amperage. You can adjust this either way, where 90% is almost entirely peak amps and 20% is almost no peak amps. The more time you spend on the peak amp portion of the pulse, the more penetration you will get, and vice versa.   Pulse Frequency/Pulse Hertz Pulse frequency or pulse hertz is the same thing: the number of pulses per second. For example, UNIMIG AC/DC machines have ...

Typical plasma cutting machine air pressure ranges from 4-8 SCFM with a pressure of 90-120 PSI. this article details the air pressure requirements for plasma cutting machines and some of the conditions necessary to keep the system stable.   What is the air pressure for a plasma cutter? A plasma cutter is really the best tool for your shop. It helps in cutting different metals of various shapes quickly. The basic requirement of a plasma cutter is compressed air. The plasma cutter air pressure gauge provides you with an accurate reading to set the air pressure. Plasma cutters are very similar to electric welding.  A superheated arc heats the compressed air of the system to a point where it transforms into plasma. Usually, a starting arc is required to create the plasma. To be precise, the air pressure required for a plasma cutter is about 4-8 SCFM at 90-120 PSI. This plasma cutter air pressure is a generalization for cutting steel between 3/8" and 7/8" thick.    Some o...