The Kemppi FastMig X 450 is a modular, inverter CC/CV power source for MIG/MAG, pulsed MIG/MAG and MMA. The documentation gives 450 A at a 60% duty cycle at 40°C and 350 A at a 100% duty cycle, with a supply of 400 V with a tolerance of +/-15% and a 35 A slow blow fuse. The power source has protection class IP23S and weighs 38 kg.
What this machine is for
This is a power source for heavy industry and series production. The CC/CV circuit on IGBT transistors handles thick steel plate, structures welded in many runs and aluminium, where control of the fusion and the look of the face count. Continuous work at 350 A with a 100% duty cycle means long beads with no breaks, and the Cool X liquid cooling of 1 kW keeps the torch in check even at an ambient temperature reaching 40°C.
The Wise software turns this power source into a tool for repeatable production. WiseRoot+ lays the root run with no ceramic backing and bridges wide gaps left by imprecise assembly, WiseFusion shortens the arc and according to the maker lowers the heat input by about 20%, and WisePenetration holds a steady current when the free wire stick out changes. The pulse gives spray transfer of metal at a low current, that is welding of thin aluminium and stainless steel with no burn through.
The maker aimed this model at shipbuilding and offshore structures, at the production of construction and mining machines, at the prefabrication of pipelines and pressure vessels, at advanced aluminium structures and at series production where the parameters have to be documented. The modular build lets you extend the set with a SuperSnake intermediate feeder and work up to 25 m from the power source.
Modularity also means that you match the station to the task: the power source stays in place, and you set the feeder with the panel by the part. The transport trolley has room for a gas cylinder, so you roll the whole set around the hall without disconnecting the cables. The electronics are parted from the cooling air stream, which limits the settling of metal dust on the inverter boards.
Features and equipment
- Four roll DuraTorque feed mechanism in the WFX series feeders: four drive rollers remove wire slip also with long cables, and you change the rollers with no tools.
- Feeder housing of plastic with double walls: it protects the wire from dirt and moisture.
- Cool X cooler of 1 kW: it takes the heat when you weld at 450 A and stops the work by itself when it detects a shortage of coolant.
- Protection class IP23S: work in the hall and on an open assembly station, with the electronics parted from the cooling air stream.
- Transport trolley with room for a gas cylinder: you move the whole station around the hall.
- X37 panel with 100 memory channels, 10 for each of 10 users, and a lock on the settings: you call up tested parameters and protect them against an accidental change, which matters when you work to a WPS.
- MatchLog: with a short press of the button in the torch you switch between two power levels while welding, for example on a changing wall thickness.
- Control from the handle of the FlexLite GX torch: you correct the parameters without walking up to the power source.
- WiseFusion: the circuit holds a very short arc no matter how the hand moves, which gives deeper fusion with a smaller pool and less distortion.
- WiseRoot+: a short arc for root runs in pipes and sheet, according to the maker up to three times faster than laying the root with TIG.
- WisePenetration: the welding current is corrected when the distance from the tip to the material changes, so the fusion stays the same along the whole weld.
- Synergic MIG/MAG and pulsed mode: you pick the type of wire, the gas and the diameter, and the machine sets the characteristic and moves smoothly between short arc and spray arc.
- Helper functions: MMA with Hot Start, Arc Force and Anti-Stick, 2T and 4T logic, gas flow before and after welding, burn back, soft start, wire feeding and gas test.
- SuperSnake intermediate feeders: an extension of the set when the operator is to work further from the power source, up to 25 m.
- Steady feeding of flux cored and aluminium wires: the drive guides them surely and at the same time gently enough not to crush soft filler.
Technical data
| Brand | Kemppi |
|---|---|
| Model | FastMig X 450 |
| Type | modular inverter CC/CV power source |
| Supply voltage | 400 V, 3 phase, tolerance +/-15% |
| Welding current at a 60% duty cycle and 40°C | 450 A |
| Welding current at a 100% duty cycle and 40°C | 350 A |
| Slow blow fuse | 35 A |
| Wire feed speed | from 0 to 25 m/min |
| Protection class | IP23S |
| Minimum generator power | 35 kVA |
| Weight of the power source | 38 kg |
| Cooler | Cool X, power 1 kW |
| Control panel | X37, 100 memory channels |
| Cooling | liquid |
| Processes | synergic MIG/MAG, pulsed MIG/MAG, WiseRoot+, WiseFusion, WisePenetration, MMA |
What you get
- Kemppi FastMig X 450 inverter power source
- WFX series wire feeder with the DuraTorque mechanism
- Cool X liquid cooler of 1 kW
What to watch out for
The supply is three phase 400 V with a tolerance of +/-15% and a 35 A slow blow fuse, and for work from a generator you need a unit from 35 kVA. Class IP23S lets you work outside the hall as well, but it does not free you from shielding the machine against rain. Liquid cooling needs a check of the level and the flow before the shift, because the circuit will stop the welding itself when the coolant runs short. The power source alone weighs 38 kg, and the set with the feeder, the cooler, the cylinder and the trolley takes two people to move. The wire feed speed reaches 25 m/min, and SuperSnake intermediate cables extend the working reach to 25 m from the power source.
The product data sheet gives a welding current up to 500 A, while the documentation gives 450 A at a 60% duty cycle, so pick the parameters from the documentation. The X37 panel with memories and a lock on the settings takes a moment to set up the user accounts. The maker states that digital settings shorten the time to get ready for work by more than 30% against analogue machines, but in practice that depends on how you describe your programs. Before you buy, settle the set of rollers, the state of the liquid cooled torch and whether you need intermediate cables.
For work at 450 A you need a liquid cooled torch and cables of a cross section matched to that current class, and for aluminium a teflon liner and U groove rollers. WiseRoot+ works properly with repeatable edge preparation and a steady gap width, so you will see the gain from this process only after you sort out the preparation of the joints. When you weld at a long distance from the power source, count the drops on the cables and think about an intermediate cable instead of adding more metres of cable.
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