The Kemppi FastMig X 450 is a modular MIG/MAG welder for heavy production, made up of an inverter power source, a WFX 300 wire feeder and a Cool X liquid cooler. The documentation gives 450 A at a 60% duty cycle and 350 A in continuous work at 100%, on a 400 V supply. The machine welds synergically, with pulse and double pulse, and it also handles a covered electrode.
What this machine is for
This is a power source for stations that work in long cycles at high currents. The CC/CV system gives a welding current of 450 A at a 60% duty cycle, and under a continuous load of 100% it gives 350 A, so the machine suits thick fillet and multi run welds on carbon and alloy steel. Liquid cooling keeps the torch in check when you weld thick aluminium sections at currents of the order of 350 to 450 A. The maker aimed this model at the shipbuilding industry, pipeline building, offshore structures and the machine industry.
The second group of jobs is thin sheet and root runs. The WiseThin+ program works with a cold short arc and holds the parameters on the edge of melting sheet from 0.8 mm to 3 mm, also in the vertical down position, with a changing gap between the edges. WiseRoot+ steers the run of the short circuit when you lay a root layer with full penetration, with no ceramic backing. Pulse and double pulse put the transfer of metal in order and give an even ripple on aluminium and on acid resistant alloys.
The machine goes to plants that join the production of heavy structures with work on thin parts: the prefabrication of pipelines in petrochemistry, the welding of acid resistant tubes with control of heat, pressed parts in the motor trade, repairs in the field from a generator, and hard facing and repairs of buckets and attachments of construction machines with a covered electrode. The modular build means that you move the source, the feeder and the cooler together on a trolley and extend the station with longer interconnection cables.
The maker pointed to work such as the building of drilling towers and offshore platforms, the laying of root layers on petrochemical pipelines, the production of thin walled pressed parts in the motor trade, work on thick materials in shipyards and ports, tight welds on acid resistant tubes, and the hard facing of buckets and scoops of mining machines with a covered electrode.
Features and equipment
- Inverter multiprocess CC/CV source, 450 A at a 60% duty cycle: the fast answer of the system to changes in the arc holds a steady penetration on thick structural parts.
- Cool X liquid cooler of 1 kW with a 3 litre tank: the fluid runs in a closed circuit and takes the heat from the torch, so the gas nozzle and the contact tip work longer.
- WFX 300 feeder with a four roll DuraTorque drive on 32 mm rolls: four driven rolls lead the wire without slip in the liner, also at high feed speeds and with torches 5 m long, and you set the pressure by hand for a given alloy.
- Feeding of aluminium wires up to 2.4 mm: a strong drive with a teflon liner in the torch leads the soft filler without jamming.
- Measurement of the arc voltage straight in the welding zone: the system makes up for the drops of voltage on long earth cables, so the parameters at the end of the torch agree with the setting also when the feeder stands tens of metres from the source, vertically or horizontally.
- Work from a generator of 35 kVA and up: filters and chokes damp the swings of voltage from a combustion generator, which helps on a site with no mains.
- Pulse and double pulse (Double Pulse): digital shaping of the pulse tears off the drops without spatter, and the double pulse lays an even ripple close to a TIG run and lowers the amount of heat put in, so thin aluminium and acid resistant sheets distort less.
- WiseRoot+: a process for root layers, which steers the rise of voltage in the short circuit phase and protects the root against falling in and against burn through, and on pipe joints it takes the place of the slower laying of a penetration run by TIG.
- WiseThin+: a cold short arc for sheet from 0.8 mm to 3 mm, which according to the maker cuts thermal distortion by more than 25% against a classic arc, with a changing gap between the edges and welding in forced positions.
- MMA mode: an alternative CC characteristic for covered electrodes, useful on repairs in a trench and in wind, where the shielding gas will not stay over the pool.
Technical data
| Brand | Kemppi |
|---|---|
| Type | modular MIG/MAG welder with an MMA mode |
| Supply voltage | 400 V, tolerance from -15% to +20% |
| Mains fuse | 35 A delayed |
| Maximum current at a 60% duty cycle | 450 A |
| Current under a continuous load of 100% | 350 A |
| Welding current given on the record | up to 500 A |
| Minimum power of the generator | 35 kVA |
| Open circuit voltage MIG/MAG | from 80 to 98 V |
| Wire feed mechanism | 4 roll DuraTorque, 32 mm rolls |
| Power of the liquid cooler | 1 kW, 3 litre tank |
| Weight of the source | 38 kg |
| Cooling | liquid |
| Processes | synergic MIG/MAG, pulse, double pulse, MMA |
| Diameter of aluminium wire | up to 2.4 mm |
| Sheet thickness in the WiseThin+ program | from 0.8 mm to 3 mm |
What you get
- Kemppi FastMig X 450 inverter power source
- WFX 300 wire feeder with a four roll DuraTorque drive
- Cool X liquid cooler of 1 kW
What to watch out for
The machine needs a 400 V three phase socket and a circuit with a 35 A delayed fuse, and the tolerance of the mains reaches from -15% to +20%. For work from a generator take a unit of 35 kVA and up with AVR voltage stabilisation, or the electronics of the inverter get voltage spikes. The cooler holds 3 litres of fluid, so you check the level and the flow before the shift, and on aluminium you set the pressure of the rolls by hand to the hardness of the wire. The measurement of the arc voltage works properly only on original Kemppi cables with a control core. The source alone weighs 38 kg, but the whole set with the source, the feeder, the cooler and the trolley takes two people to move.
The product record gives a welding current up to 500 A and the documentation of the maker 450 A at a 60% duty cycle, so when you choose the parameters keep to the values from the documentation. Settle with us what the set holds, the state of the torch and the cables and the full set of rolls before you buy, because the equipment for this class of current is picked to the diameter of the wire and the length of the torch.
For work at 450 A you need interconnection cables of the right cross section and a liquid cooled torch, and for the MMA mode a separate electrode holder rated for high currents. WiseRoot+ needs a repeatable bevel and a steady width of the gap, or the program will not hold the root. WiseThin+ works properly with a steady flow of multi component gas and wire of steady quality. On aluminium count on a change of the liner for a teflon one and on setting the rolls for wire up to 2.4 mm.
This unit is sold
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