The best multiprocess welding machines in 2023

In this article

The best multiprocess welding machines in 2023

Spread the knowledge


A multiprocess welding machine is the best of two worlds -or several worlds- for saying so. With the same machine, you will be able to perform MIG, TIG, STICK, and other welding processes, just by changing the mode in the panel.

Of course, not all multiprocess welding machines are exactly the same. So, in this article, our experts decided to define which ones they will give a medal to this year. So, let’s review in detail each one of them, and reveal the pros and cons of multiprocess welding machines. But let’s get started by explaining why they might be needed.

Why might a multiprocess welding machine be needed?

A multiprocess welding machine is a need in any workplace where it is required to switch between processes constantly. The need for this constant change could be the different types of metals or thicknesses that you might need to weld in a single day. That is usual for repairs and upgrades because they face different metals to weld.

It is also essential when the same welder must be moving around (for example on a construction site). They need a portable welding machine that can be used for any welding process, at any moment.

If you are in a welding learning process, you also might need to settle for a multiprocess welding machine. That way you can experiment and learn all welding processes without the need to buy several machines (and all the money that would cost).

Another possible reason to get a multiprocess welding machine can be the need to tackle two or more welding processes on a regular basis, but you don’t have either the budget or the room to have separate dedicated machines. In this particular case, we would recommend you double-check that the multiprocess welding machine you are planning to get performs fine the welds you need to do. That is especially the case with aluminum.

This being said, let’s go for the top 5 multiprocess welding machines for this year.

Everything you need to weld

More than 40 years of welding experience

5th place: Ronch Raptor R500MP

The Ronch Raptor R500MP is an inverter multiprocess welding machine with outstanding arc stability. It can perform MIG, TIG, STICK, and FCAW. It comes equipped with protection systems for temperature, voltage (V), and current (A) sensors.

Ronch Raptor Duty R500MP

Highlights of the Ronch Raptor R500MP

Processes: MIG, TIG, STICK, FCAW
Current Type: AC
Input Hz: 50/60 Hz
Input Voltage: 3~220/380/440 VAC + 10%
Shipping Dimensions: 30 x 16 x 28 inches
Weight: 118 lbs
Work Cycle (40º C 10min): 500A at 60% 39V / 390A at 100% 34V

A few details about the Ronch Raptor R500MP

The Ronch Raptor R500MP multiprocess welding machine adopts the latest insulated gate bipolar transistor (IGBT) power module, which can change work frequency to medium frequency so as to replace the traditional hulking work frequency transformer with the cabinet medium frequency transformer. This welding machine is characterized as portable (with the use of a cart), lightweight (in comparison with its counterparts), low consumption, etc.

This welding machine is suitable for all positions welding for various plates made of stainless steel, carbon steel, alloyed steel, etc. It is also applied to pipe installment, mold mend, petrochemical, architecture decoration, car repair, bicycle, handicraft, and common manufacture. It can perform all the most used welding processes.

The Ronch Raptor R500MP multiprocess welding machine has overvoltage, overcurrent, and overheat protection functions. If any one of these situations happens, a light in the front panel will be lit and the output current will be shut off automatically to protect itself and prolong the equipment using life.

Features of the Ronch Raptor R500MP

Protection: Equipped with temperature, voltage, and current sensor protection systems
Wire Diameter (Solid) 0.8 -1.6 mm
Wire Diameter (Tubular) 1.2 – 2.0 mm
Current Range (A): 45 – 500 A
Electrode Diameter: 3/32” (2.4mm) – 3/16” (5.0mm)

4th place: Miller Pipeworx 400

The Miller Pipeworx 400 is a multiprocess welding machine simplified and optimized for pipe fabrication shop welding. The Miller Pipeworx 400 systems streamlined set-up with one-touch welding, quick process changeover, and Pulsed and Modified Short-Arc MIG processes, which makes training and turn-around times faster than ever before.

Miller Pipeworx 400

Highlights of the Miller Pipeworx 400

Processes: Air Carbon Arc Cutting and Gouging (CAC-A), Flux Cored (FCAW), MIG (GMAW), Multiprocess, RMD, Stick (SMAW), TIG DC (GTAW-DC)
Current Type: DC
Input Hz: 50/60 Hz
Input Voltage: 220/230/240 V – 460/480 V
Shipping Dimensions: 29 x 20 x 32 inches
Weight: 225 lbs.
Duty Cycle: 400 A at 36 VDC, 100% duty cycle

A few details about the Miller Pipeworx 400

Simple Process Setup: Clearly labeled controls in easy-to-understand welder terminology. Requires just a few basic steps to set up a new weld process, resulting in less training time and minimizing errors from incorrect setups.

The front panel was designed by welders for welders. Only backlit controls are adjustable to eliminate confusion. Memory feature stores four programs for each selection: Stick, DC TIG, and MIG (left and right side of feeder). Beneficial when using multiple procedures, multiple process parameters, or multiple welders and eliminates the need to remember parameters.

Quick Process Changeover: No need to manually switch polarity or cables and hoses between processes. Simply push a process selection button to choose a welding process. PipeWorx ‘Quick-Select’ technology automatically selects the welding process, the correct polarity, cable outputs, and welding parameters.

Quick process changeover eliminates set-up time for switching cables and gas hoses. Also, reduces the risk of weld reworks due to incorrect cable connections.

Multiprocess Machine: Weld processes are optimized to deliver superior arc performance and stability specifically for root pass, fill, and cap pipe welding. Includes conventional Stick, DC TIG (Lift-ARC™ or HF Start), Flux-Cored, and MIG welding processes.

Also features the advanced RMD® and Pulsed MIG processes that deliver superior quality welds, increase productivity, and reduce rework and training.

Streamlined System: Wind Tunnel Technology™ and Fan-On-Demand™ provide system protection in the dusty shop environment.
Innovative cable and gun storage manage clutter for a cleaner, organized weld-cell area. Cables remain connected to the power source and do not need to be switched for the different welding processes. All system components have been selected to meet the needs of a pipe fabrication shop.

Features of the Miller Pipeworx 400

  • Weldable Metals: Steel, Stainless Steel, Specialty Metals
  • Input Phase: 3-Phase
  • Amperage: Stick: 40–400 A / DC TIG: 10–350 A / MIG/flux-cored: 10–44 V, 400 A 
  • Max Open Circuit Voltage: 90 VDC
  • Weld Output: CC / CV
  • Rated Carbon Diameter: 5/16 in (7.9 mm)
  • Industries Interests: Construction, Shipbuilding, High Purity Processing, Fabrication, Mechanical Contracting, Pipe Fabrication, Construction, Pressure Vessel, Education, Training
  • Portability: Lift Eye (Standard), Running Gear, Cart (Standard)

3rd place: Miller Dimension 650

The Miller Dimension 650 has been developed for harsh environmental conditions and output requirements that range from power-intensive to precise.

Miller Dimension 650 ArcReach

Highlights of the Miller Dimension 650

Processes: Air Carbon Arc Cutting and Gouging (CAC-A), Flux Cored (FCAW), MIG (GMAW), Multiprocess, Stick (SMAW), Submerged Arc (SAW), TIG (GTAW)
Current Type: DC
Input Hz: 50/60 Hz
Input Voltage: 380/400/440 V – 460/480 V
Shipping Dimensions: 17 x 29 x 32 inches
Weight: 158 lbs.
Duty Cycle: 650 A at 44 VDC, 100%

A few details about the Miller Dimension 650

Rugged and Durable Inside and Out: All aluminum construction makes the machine resist corrosion for long life. With exclusive technologies including Wind Tunnel Technology™ and Fan-On-Demand™, the Dimension 650 will withstand the elements and keep on working.

Smaller and lighter: Reduced size and weight result in 40% less floor space than the previous model giving a package that exceeds the welding performance of larger, heavier machines.

Power Efficient: High electrical efficiency and excellent power factor mean that you can get more welding done using less power. On 460 VAC input power, the Dimension 650 at the rated output can operate on a 50-amp service. Four machines can work at maximum loads simultaneously, drawing less amperage than the three previous models.

Improved Arc Performance: High-quality performance from power-intensive to precise. Gouging mode provides 800 amps of usable power, a full 650 amps of power at a 100-percent duty cycle.

Perfect for heavy gouging with 3/8-inch carbons. Three wire modes(GMAW/FCAW/SAW)for simplified setup and optimized arc performance. Solid and flux-cored wires with gas offer exceptional short-arc MIG precision to weld thin metals with less risk of distortion or burn-through and premium Flux-Cored welding with gas.

Flux-Cored (self-shielded) welding performance is exceptional, especially with wires commonly found in infrastructure construction. Sub Arc mode provides the capability to retrofit into non-digital Sub Arc applications.

Excellent Stick and Lift Arc TIG performance. Arc control is beneficial when welding with Stick and solid wires for easier fine-tuning of tough-to-weld materials and out-of-position applications.

Features of the Miller Dimension 650

  • Weldable Metals: Steel, Stainless Steel, Specialty Metals
  • Input Phase: 3-Phase
  • Amperage: 15–815 A, 10–65 V
  • Max Open Circuit Voltage: 87 VDC
  • Weld Output: CC / CV
  • Industries Interests: Construction, Heavy Equipment Manufacturing, Infrastructure, Manufacturing, Railcar, Shipbuilding
  • Portability: Lift Eye (Standard), Running Gear, Cart (Optional)

2nd place: Miller Multimatic 255

The Miller Multimatic 255 is built for professionals in the maintenance, repair, and operations (MRO) segments, as well as in light manufacturing and fabrication. The Miller Multimatic 255 is a small, versatile welding equipment with an intuitive setup to increase efficiency and productivity. This inverter multiprocess welding machine is easy to use, portable and delivers versatility for faster uptime and performance.

Miller Multimatic 255

Highlights of the Miller Multimatic 255

Processes: Aluminum Welding, Flux Cored (FCAW), MIG (GMAW), Multiprocess, Stick (SMAW), TIG DC (GTAW-DC)
Current Type: DC
Input Hz: 50/60 Hz
Input Voltage: 208 V – 220/230/240 V – 460/480 V – 575 V
Shipping Dimensions: 20 x 14 x 25 inches
Weight: 84 lbs.
Duty Cycle: MIG: 230 A at 25.5 V, 60% duty cycle / Stick: 200 A at 28 V, 60% duty cycle / TIG: 275 A at 21 V, 60% duty cycle

A few details about the Miller Multimatic 255

Versatility: Multiprocess Capabilities of MIG, Pulsed MIG, Stick (6010), DC Lift Arc TIG and DC Pulsed TIG

Easy-to-understand interface: 7-inch color LCD display ensures proper machine setup and parameter selection, reducing setup time and increasing weld time.

Auto-Line™ Technology: For portability and reliability this inverter power supply allows for any single-phase input voltage hookup (208–575 V) with no manual linking, providing convenience in any job setting. Ideal solution for dirty or unreliable power.

Pulsed MIG welding delivers higher quality: Lower heat input for less distortion on thin materials, less spatter minimizes post-weld grinding and rework allowing more welding time. Perform welding applications that couldn’t be done in the past

Auto-Set™ Elite: Offers predefined weld settings to increase ease of use and ensure that the job is done right for operators of all skill levels.

The program mode allows easy saving and recall of favorite weld settings: Deliver more productivity and consistent quality by welders of all skill levels by using prequalified weld settings. Minimize the supervisor’s need to intervene.

MDX-250 MIG Gun w/ AccuLock™ S consumables: AccuLock liner loads from the front and locks at the front and back to insure proper alignment for flawless wire feed path. New rubber over mold and ball-and-socket handle design improves grip and reduces welder fatigue. New Industrial Bernard AccuLock™ S contact tips provide superior Spray and Pulsed MIG arc performance.

Portability: The machine only weighs 84 lb. Weight is reduced by more than 50 percent compared to transformer welding machines

Optional EZ-Latch™ running gear: Operators no longer need to use a lift truck to load the machine and running gear into the truck. Latches secure the machine to running gear. Simply loosen the latch retaining knob and rotate the latches to disengage the machine from the running gear for easy portability

Generator Compatible: The Multimatic 255 will be able to operate and provide a full output when powered by generators with 12000 Watt (12K) output or higher. The limited output will occur when used with smaller generators.

Features of the Miller Multimatic 255

  • Weldable Metals: Steel, Stainless Steel, Aluminum
  • Material Thickness: Mild Steel 22 ga. – 1/2 in. (MIG) / Mild Steel 24 ga. – 3/8 in. (TIG) / Mild Steel 16 ga. – 5/16 in. (Stick) / Aluminum 18 ga. – 1/2 in. (MIG)
  • Input Phase: 1-Phase
  • Amperage: 5 A – 350 A
  • Input Amperage: 34.7
  • Max Open Circuit Voltage: 81 VDC
  • Weld Output: CC / CV
  • Industries Interests: Auto Repair, Boat, Yacht, Commercial Truck and Trailer, Construction, Education, Training, Fabrication, Farm and Ranch, Maintenance and Repair, Manufacturing, Metal Art, Sculptures, Racing, Customizing, Restoring
  • Portability: Handle(s), Running Gear / Cart (Standard)

1st place: Miller XMT 350 Fieldpro with Suitcase ArcReach 12 Wire Feeder

The Miller XMT 350 Fieldpro with Suitcase ArcReach 12 Wire Feeder represents a step forward a more efficient welding operation. Backed by ArcReach® technology, it increases productivity in the field.

Miller XMT 350 Suitcase ArcReach 12

Highlights of the Miller XMT 350 Fieldpro

Processes: MIG (GMAW), Pulsed MIG (GMAW-P), RMD®, Stick (SMAW), TIG (GTAW), Flux-cored (FCAW), Air carbon arc cutting and gouging (CAC-A), Induction heating
Current Type: DC
Input Hz: 50/60 Hz
Input Voltage: 208 V – 220/230/240 V – 380/400 V – 460/480 V – 575 V
Shipping Dimensions: 17 x 13 x 24 inches
Weight: 93 lbs.
Duty Cycle: 350 A at 34 VDC, 60% duty cycle / 300 A at 32 VDC, 60% duty cycle

A few details about the Miller XMT 350 Fieldpro

ArcReach® Technology: ArcReach capabilities increase job site productivity and efficiency by eliminating the time spent tracing weld cables hundreds of feet back to the power source because weld operators can make voltage adjustments at the ArcReach wire feeder or remote.

Increased Uptime: The XMT 350 FieldPro welders and ArcReach accessories have been extensively field-proven and deliver the performance you need with ruggedly constructed internal components and Wind Tunnel Technology™.

Improved Jobsite Safety: The chances of slip, trip, and fall injuries are decreased because ArcReach technology allows weld operators to make parameter changes at the wire feeder or remote instead of having to travel through multistory and cluttered job sites back to the power source.

AccuLock Consumables: AccuLock can transform the way businesses manage their MIG welding gun consumables, helping them to optimize productivity, operating costs, and welder confidence. Fewer tip changes, less troubleshooting, and more beads worth bragging about.

Cable Length Compensation (CLC™): This ensures that the voltage a weld operator sets is the voltage they get by automatically adjusting voltage based on weld cable length, even hundreds of feet away from the power source.

Exceptional Arc Performance: The XMT 350 FieldPro systems maximize weld quality, reduce training time, and minimize weld defects even while using weld cables that are hundreds of feet long.

Maximum Fleet Compatibility: Get the benefits of ArcReach when you pair XMT 350 FieldPro welders and ArcReach feeders with other ArcReach-compatible products.

Adjust While Welding: Weld operators have more control and can Adjust While Welding (AWW™) to make fast, easy weld parameter changes at the wire feeder or remote — even while the arc is on. Only Miller offers this advanced solution.

Control Panel Locks Out: Inadvertent parameter changes by other job site workers can be avoided because connecting an ArcReach accessory to the power source automatically locks out the power source’s panel controls.

Auto-Process Select™: Decrease the chance of an incorrect weld process being used because Auto-Process Select automatically sets the power source to the correct weld process based on the polarity applied to the welding accessory.

Auto-Line™ Technology: Work in more places with Auto-Line technology which automatically calibrates the power source to operate properly when connected to any primary input voltage ranging from 208-575 volts, single or three-phase, 50 or 60 Hz,  with no manual linking required.

ArcReach Heater Compatibility: Take charge of your field preheating and bakeout applications up to 600 degrees Fahrenheit (315°C). This system uses induction heating to generate heat in workpieces, so welders can do their own preheating quickly and safely. A part of the ArcReach technology platform, the ArcReach Heater is an accessory for select ArcReach welding power sources.

Features of the Miller XMT 350 Fieldpro

  • Weldable Metals: Steel, Stainless Steel, Specialty Metals
  • Rated Carbon Diameter: 1/4 in (6.4 mm)
  • Input Phase: 1- and 3-Phase
  • Output Range 10–38 V, 15–425 A 
  • Max Open Circuit Voltage: 75 VDC
  • Weld Output: CC / CV
  • Industries Interests: Auto Repair, Commercial Truck and Trailer, Construction, Education, Training, Fabrication, Maintenance and Repair, Manufacturing, Metal Art, Sculptures, Racing, Customizing, Restoring

Ask the experts

Our experts are ready to help you

Multiprocess welding machine pros and cons

There are clearly more advantages than disadvantages regarding multiprocess welding machines, but, anyway, let’s see about a few of each one.


Money-saving: A multiprocess welding machine is usually slightly more expensive than a single-process machine. Now, is quite cheaper than buying 3 different machines to be able to perform all the same welding processes. So, when you do the math, you save some bucks by getting a multiprocess welding machine.

Versatility; You don’t need to have several machines to tackle all your different welding jobs, but only one will do it.

Portability: Imagine that you need to move around in a construction site with 3 machines, plus the accessories to use them. That doesn’t sound so portable. Well, with a multiprocess, you will need a single machine. This is even more evident when welding aluminum because in that case, you will need a spool gun, which is really portable.


Not all the functions: In some cases, a multiprocess welding machine has fewer specific functions available than single-process machines. So, if your welding job is quite specialized, a multiprocess might not be the best option for you.

Lower work duty cycle: In some cases, depending on the make, a multiprocess welding machine could have a lower work duty cycle in comparison to single process machines.

A key point for you to get all the advantages and none of the disadvantages of multiprocess welding machines is getting one good model from a well-known brand, like Miller. They really care about manufacturing reliable and trustworthy equipment.

So, what multiprocess welding machine is for you?

Now is your turn to define that. We have shown you in this article 5 models that can suit different needs. If you have come to the conclusion that a multiprocess welding machine is what you want, your production needs might be the reason why you would choose one of these.

If you want some help here, feel free to contact us. Our consultants have decades of experience in dealing with multiprocess welding machines.

Request more information

This Post Has 2 Comments

  1. Jony

    I agree with your statement about the multiprocess welding machine. Using this machine makes it easier to work with another welder.
    Thanks a lot for sharing your experience.

  2. The concept of multiprocess welding machines in 2023 is simply groundbreaking. These machines are like Swiss Army knives for welders, offering a seamless transition between MIG, TIG, STICK, and other welding processes. The article rightly highlights their diverse applications, from handling various metals in a single day to providing portable solutions for welders on the move. For welding enthusiasts, they are a cost-effective means to master multiple techniques without investing in multiple machines. However, it’s essential to heed the article’s advice and carefully evaluate the machine’s performance for your specific welding needs, especially if you’re dealing with challenging materials like aluminium. A multiprocess welding machine is undoubtedly the welding world’s best friend in 2023!

Leave a Reply

The authors

Codinter Editorial Team

Codinter Editorial Team

The Codinter Editorial Team is composed of a diverse and multinational group of specialists, researchers, and writers, equipped with field experiences throughout decades of developing solutions with technology for industrial purposes.

Spread the knowledge


Stay with us

We want to share what we have learned from the decades of experience we have with products and services for the industry in America. All this educational content is now at your disposal.