The Miller Dynasty® 400 Wireless Complete W375 is a 400 amp AC/DC TIG welder package that comes complete with wireless remote amperage foot control, TIG torch with accessories, water cooler with 4 gallons of coolant, shielding gas regulator with hose and running gear with cylinder rack. It features advanced AC waveforms and pulsed TIG welding. The Dynasty 400 operates on either single phase or three phase input power. Miller's Auto-Line™ technology allows connection to any input voltage in the world while using half the power of a non-inverter welding machine.
The Dynasty 400 offers design improvements over previous Dynasty 350 models. New design benefits include: increased resistance to adverse environmental conditions, memory card port for easy software updates or expansion and improved arc stability for AC welding. The Cooler-On-Demand™ feature operates the Coolmate™ TIG torch cooling system only when needed, saving power and unnecessary wear and tear on the water cooler. The Pro-Set™ feature automatically sets welding parameters for you, eliminating guesswork. The Dynasty 400 can also be run in manual mode, allowing you to customize your own welding parameters.
Direct replacement for the Miller Dynasty® 350 Complete with wireless foot control.
AC/DC TIG (GTAW)
Pulsed TIG (GTAW-P)
Air carbon arc (CAC-A) - 1/4 in. maximum
Heavy Industrial Apps
Precision Metal Fabrication
Pipe and Tube Fabrication
Aluminum Ship Repair
Anodized Aluminum Fabrication
Auto-Line™ allows for any input voltage hookup
(208–575 V) with no manual linking,
providing convenience in any job setting.
Ideal solution for dirty or unreliable power.
Meter calibration allows digital meters to
be calibrated for certification.
Cooler Power Supply (CPS)
is an integrated 120-volt
dedicated-use receptacle for
the Coolmate™ 3.5.
Wind Tunnel Technology™
protects internal electrical
components from airborne
contaminants, extending the
Fan-On-Demand™ power source
cooling system operates only when
needed, reducing noise, energy use
and the amount of contaminants
pulled though the machine.
Lift-Arc™ provides AC or DC
arc initiation without the use of
Blue Lightning™ high-frequency (HF)
arc starter for non-contact arc initiation.
Provides more consistent arc starts
and greater reliability compared to
traditional HF arc starters.
Program memory features nine
independent program memories
that maintain/save your parameters.
Auto-postflow adjusts the length of
postflow time based on the amperage
setting, shielding your tungsten
and eliminating the need to set the
Wireless remote compatible (Wireless Foot Control Included) - fully compatible with Miller
wireless remote control solutions —
so you can work the way you want
AC TIG Features
AC Pulsed TIG standard
0.1 to 500 PPS
AC Balance (50-99%) controls the amount of oxide cleaning (amperage time in EN) which is essential for high quality welds on aluminum.
AC frequency (20-400 hz)controls the width of the arc cone and the force of the arc.
Advanced AC Waveforms
DC TIG Features
DC Pulsed TIG standard
0.1 to 5,000 PPS
Exceptionally smooth and precise arc for welding exotic materials.
Stick Features (AC/DC)
Tailored arc control (DIG)
arc characteristic to be changed for
specific applications and electrodes.
Smooth running 7018 or stiffer, more
Hot Start™ adaptive control provides
positive arc starts without sticking.
AC frequency control
adds stability for
smoother welds when AC Stick welding.
Comes complete with
Dynasty® 400 AC/DC TIG/Stick welder
Coolmate™ 3.5 water cooler
Weldcraft™ W-375 torch kit and accessories
AK4C torch accessory kit includes 3 nozzles,
3 collets, 3 collet bodies and 3 pieces of 2% ceriated
tungsten electrodes (1/16, 3/32 and 1/8 inch)
Coolant (4 one-gallon bottles of 043810)
Wireless remote foot control and receiver (300429)
Quick Reference Guide
This item ships Free via standard ground shipping within contiguous U.S.
I'm thinking about buying the Miller engine driven welder Bobcat that supplies 3-phase power. Could I run this 350 Dynasty off of it?
Miller advises that they do not recommend running the Dynasty 350 on the Miller Bobcat 3 Phase (907505) because it would draw too much power and potentially put too much "stress" on the generator. Ultimately it would run but you would not be getting the full potential of either machine.
How many pulses per second. Any big differences between 350 and 280 besides amps?
PPS Pulses per second (Hz): DC = 0.1 – 5,000 PPS / AC = 0.1 – 500 PPS
Miller advises that the Dynasty 350 and Dynasty 280 have radically different power sources and should not be compared. The Dynasty 350 is a heavier, less portable machine with 36 memory locations to save your welding parameters - (9 AC TIG, 9 AC Stick, 9 DC TIG and 9 DC Stick) The Dynasty 350 will also have out of the box independent amperage control.
Can I use miller suite case extreme 8vs with the miller dynasty 350
You can run an 8vs feeder off of a Miller Dynasty 350 Wireless Foot Control TIGRunner Complete 951402however it is not the best way to go.. The 8vs has a cv/cc switch .. The Dynasty 350 is a constant current (cc) machine.. You will need to position the switch in the cc position.. You will not get the best welds using this set up but it will work
Other than choices of gas, tungsten, and filler wire plus the electrical hookup, will I need anything else before I start to weld?
The Miller Dynasty 350 Wireless Foot Control TIGRunner Complete 951402 is a complete package.. Just add gas , Filler wire and hook up to your electric and you are ready to go.. It even comes with a 3 sizes of 2% cerium tungsten electrodes (1/16, 3/32, and 1/8 in)
Hands down the best machine I've ever used for TIG welding.
By Art R.
Leslie Mi. 49251
May 15, 2016
Not much it can't weld steel or aluminum, some absolutely beautiful aluminum welds....Best Deal hands Down....
By Auto Engineering
Simply the best....
February 25, 2016
The Dynasty was the fourth Miller welder we added to our shop so we do like the brand. But the 350 Tig Dynasty is just outstanding. Once you go into the advanced settings AC you can tune a bead to perfection. The pulse per/sec setting combined with the amplitude modulated freq setting can produce the perfect Marangoni effect to agitate a puddle so that it's free of any flaws or trapped bubbles. And on DC you can push the freq setting up to 5000 per second (!) which allows you to lay down a 1/8"-1/16" bead with penetration. Simply the best machine I've ever seen in this price range.
PS; As serious hobbyists not professional welders we are producing welds that we would put up against a lot of pros in terms of quality.
ConsHaven't seen any yet.
Will do it all!
January 20, 2014
We hooked machine to three phase 220. I have not found any metal this machine will not weld from two inch aluminum to 22 ga. stainless steel with proper prep. I welded two coke cans together! While welding two inch plate never had a problem with duty cycle [ preheat]. Forty years welding.
Proseasy to use!
Ft. Lauderdale, Fl
June 24, 2013
Just set up this machine today and was welding 3 x 1 1/2 x 1/4 inch aluminum channel. The welder was real smooth and even. Tungsten was super stable at 330 amps and weld bead held smaller than on a syncrowave 350. Only reason I gave it a 4 star is the duty cycle could be a little better. Awesome welder. I have welded for over 30 years.