Welder World Blog

Posts Tagged ‘Plasma’

Harbor freight 7018 stick electrodes and Longevity weldmax lc-518d multiprocess stick tig plasma cutter. longevity-inc.com I just got this machine and I just wanted to try it out. It’s raining outside and I just felt like burning some rods. these are harbor freight rods and they are not bad but they are more expensive than lincoln electric rods at home depot. I’m not doing any tig welding or plasma cutting yet because I have not hooked it up for that yet.

Experience Longevity Welding at www.longevity-inc.com or www.lweld.com. Longevity Welding Equipment is an industry leader in providing welding professionals and enthusiasts affordable plasma cutting and TIG/MIG/ARC welding equipment for over 6 years. Check out our welding community at www.freeweldingforum.com to see how our customers rate our equipment and how Longevity Welding is quickly becoming recognized as a competitor to the overpriced leading brands. This demonstrations shows the new Pilot Arc starting technology from the Longevity WeldAll 200PI Plasma Cutter and TIG/ARC Welder. The unit will be featured on sale at www.longevity-inc.com or www.lweld.com We urge you to experience welding like never before at www.longevity-inc.com and do not forget to join the fastest growing welding community at www.freeweldingforum.com Thank you all, Longevity Welding

This is a cut of the Longevity logo for entry into their contest.

• ISBN13: 9781557885135
• Condition: NEW
• Notes: Brand New from Publisher. No Remainder Mark.

Product Description
A newly-updated, state-of-the-art guide to MIG and TIG arc welding technology.

Written by a noted authority in the field, this revised edition of HP’s bestselling automotive book-for over 20 years-is a detailed, instructional manual on the theory, technique, equipment, and proper procedures of metal inert gas (MIG) and tungsten inert gas (TIG) welding.

Welder’s Handbook, RevisedHP1513: A Guide to Plasma Cutting, Oxyacetylene, ARC, MIG and TIG Welding

IGBT Plasma Cutters

Plasma cutting in simple is a process through which steel and metal of different sizes and thickness is cut through the plasma torch. During this process, the inert gas or compress air used in some machines is blown at very high speed from the nozzle and at the same time electrical arc is made from the gas of nozzle to the surface needed to cut which turns some of the as to plasma. This plasma is suitably hot to easily melt the metal that is cut and it also moves fast to blow the metal far from the present cut. Additionally Longevity plasma arc cutters and several other applications also use IGBT plasma cutting technology which enables for Longevity to provide more commercial plasma cutting equipment.

The starting method

The Longevity IGBT plasma cutters generally use a different method to start the pilot arc and are built for professional metal working environments. Some IGBT plasma metal cutters might often use high frequency starting technology, high voltage circuit just for the starting process and others use Pilot Arc starting technology, where the torch enables a constant arc without touching the work piece. A Longevity IGBT plasma cutter featuring high frequency starting technology is more affordable, but also possesses a technological inferiority because of spark gap maintenance, difficulty of repair and you might also find a huge amount of radio frequency emission. Those plasma cutters which work near sensitive electronics like computers or CNC hardware would use the contact start method. The electrode and nozzle would be in contact. Here the nozzle would be the positive and electrode is the negative. So, when the plasma cutter gas starts to flow nozzle would be flown forward. However the other method which is less common is the capacity discharge in the main circuit through silicon controlled rectifier. In most cases Longevity uses Pilot Arc starting technology with IGBT Plasma Cutters because of the popularity and importance of a quick starting arc.

Inverter IGBT plasma cutters

The analog plasma cutter would generally need above 2 kilowatts and they also use heavy mains frequency transformer. The inverter plasma cutters generally rectify the main supply to the DC supply which is give as a high frequency transistor to nearly 200KHz. Some higher switching frequencies would give even greater efficiencies in transformer which allows its weight and size to be reduced.

The transistors that were commonly uses before were MOSFETs but today IGBT plasma cutters are highly being used in commercial or industrial applications where the demand of the size of the amperage is high. When placed parallel with MOSFETs and one transistor activates too early then, it can lead to cascading problem of one of the quarters of inverter. However with the newer invention and by using IGBTs, the Longevity Testing Team was able to avoid this problem. The IGBT plasma cutter can be commonly found in several high current plasma metal cutting machines that put out more than 60amps of power.

The Longevity ArcMate M200 IGBT Mig Welder is the first device to include IGBT technology in the Longevity Welding Equipment lineup, which achieved great success for MIG Welders able to compete with the leading brands and it enabled a it opened the doors for other IGBT welders and plasma cutters. After carefully testing a number of IGBT products by the Longevity Testing Team and well received recognition from welding professionals, it lead to the launch of the IGBT plasma cutters and welders full line up. These units are of top notch quality, are easily portable and can compete with any major brand that is today available in the market regarding both the price and quality.

In order to help you choose IGBT or MOSFET Welders/Cutters, you will come to a conclusion more accurately after taking into consideration the pros and cons of both technologies, along with the purpose of their use, commercial/industrial/professional or enthusiasts. To make a decision you will need to understand what type of application you are going to use the welders for whether it is commercial welding or garage or small shop welding take your pick of equipment is the best alternative for those who wish to make an informed choice. Remember, the IGBT welders and cutters are bit a pricier so please take that into account as well.

Longevity MOSFET Welders/Plasma Cutters use MOSFET technology, which is most commonly used when the amplification or switching of electronic signals is the need of the hour. Longevity has designed welding equipment featuring MOFET technology to keep the cost low for hobbyist and enthusiasts. Longevity uses MOSFET technology in plasma cutters and welders that require less strenuous use or on less powerful, smaller amperage equipment. This technology, when applied in a welder/cutter can ensure optimum utilization of available electrical power so that too much power is not allowed to flow through the circuit gateway of the device. This technology of MOSFET Welders and plasma cutters is quite beneficial in ensuring that the gateways of coupling circuits do not burn out due to overexposure to high voltage current flow. This metal oxide semi conductor field effect transistor technology is a popular choice among users of welding equipment if they are looking for a compact yet highly efficient machine to perform exceptional welding jobs. This genre of welders has been gaining in popularity from the time the MOSFET technology was invented in 1959 by two extremely dedicated research scientists of Bell Labs who have been extremely devoted to electronic research. Since the invention, Longevity MOSFET plasma cutters and welders are enable the welding population to use smaller and more affordable welding/cutting equipment for their jobs.

IGBT Welders are those welding machines which employ the Insulated Gate bipolar Transistors in their internal electronic circuits. The IGBT is a power semi conductor device with three terminals well known for its high efficiency and fast switching. It is being fitted in many modern electronic appliances, including cars, stereo systems and even refrigerators, apart from IGBT. This technology is very effective where there is a high requirement of switching amplification. The IGBT Welders have technology that is designed to rapidly switch the device on and off, and this allows the machine to synthesize complex wave forms with both, pulse with modulations and low pass filters. The IGBT can compile the gate drive feature of MOSFET with the low saturation and high current capabilities of the bipolar transistors of former fame. The IGBT technology is used in controlling large amounts of power. These welders are quite popular with the users who require high pulse ratings in comparatively low prices. Longevity IGBT Welders and Cutters are built for more commercial and heavy duty applications. The use of this technology allows Longevity to provide welding equipment that is designed for professional and industrial job requirements.

Whichever of the two, MOSFET vs IGBT Welders/Plasma Cutters that you may choose, Longevity has a variety of models in both technologies and all can be viewed at www.longevity-inc.com. With easy transportability and a greater amount of superiority in the welder features, Longevity welders and plasma cutters are truly world class. If you are deciding which is better and still having a hard time concluding, please note that both IGBT or MOSFET technologies are covered by Longevity’s unmatched 5-YEAR parts and labor warranty. Without a doubt, an inexpensive means to achieve the perfect balance between technology and excellent output, the welder models that are available at Longevity truly offer a better durability to the clients.