UNIMIG VIPER 120 SYNERGIC MIG KUMJRVM120 Questions & Answers

Hi Phil, in terms of gasless wire, the VIPER 120 SYNERGIC is designed for mild-steel flux-cored gas. For stainless on this machine you would need gas-shielded stainless steel wire.

So in simple terms is that a No? It won't weld without a gas? Does any of your Welders weld without gas hooked up for ssteel. ?

No, not with this machine. Gasless Stainless Steel wire is very specialised, and also quite expensive. We always would recommend to weld Stainless Steel with a gas-shielded wire, using a 98-2 Argon-C02 mix gas. This will be much cheaper, much more effective, and a better result when welding than with stainless gasless wire.

Ok Thanks.

Hi if this is the first time you have put wire through its a normal Thing I Thought the same thing the first time I Put the wire through once the wire has passed through and come out the torch it will slow down to normal wire feed speed depending on what you have it set on Rem to keep Hose as straight as poss when first putting Wire Through also remove the copper Tip

Also Make sure you have the correct feed roller in the right way up depending on Solid core wire or Flux core

Enjoy its a great wee Machine

Hi Jim, Read my comment on this machine. I would not run 0.9 wire, go for 0.8 as a max! Set the machine for 0.6 and it should work well. Gasless, or flux core is very specialised welding, but good for welding galv tube. I can not see anyone using it for general welding, just use sticks. I use 0.9 wire to spray arc welds on 25 mm plate @ 250 amps,

Thanks for quick feedback! The whole synergic thing is a bit too simplistic for my liking, I'd rather control the amps wire speed etc myself, but for $200 off gumtree, I couldn't argue :-), I'll give your suggestions a go, and see what happens. 0.9 I used to run on the migomag welding 50506angle and 32nb med tube all day everyday. Be glad to get this little baby going well as it can

Pure Argon is not the go with MIG welding, it will give shallow penetration but a wider bead profile in a weld. You need a an argon/carbon dioxide mix, Ar/CO2 mix is a 75/25 ratio, with 75% of it being argon and 25% of it being CO2. They are a simple unit, a bit of practice and work the knob to find the correct spot for you. They are also sensitive to roller pressure, too tight it wont roll out as needed.

Yep was just trying it cos I had it there, would normally use Corgon52, or modern equivalent and yes playing with the roller pressure as well

I would say that it is 3 metres. I don't like longer leads as they tend to strangle the wire. The machine is very light and it's easier to move it close to the job.

Ok thanks that should work fabbing up a frame .

Good feed rollers help with feed . For the price it sounds ok for home welding

You can weld 1mm sheet but you will need to be careful not to burn through the sheet. You'll need to use tacking and stitching techniques. Give this article a read, it details some of this info on how to do it: external link 

Hey Keith, is it cutting out right away when welding? Are you running it on an extension lead? Also if you could please email me some pictures of your setup charles@unimig.com.au I’ll be able to identify your issue.

Yes cutting out straight away. And no plugged in to wall socket. No matter the settings it's the same result cuts out straight away will send pic and video

For such thin materials use .6mm wire and it's best to do small weld cycles allowing the metal to cool down. For such thin materials TIG is definitely recommended but it is still possible with mig.

Hi John, the VIPER 120 SYNERGIC is not suitable for aluminium welding, it's only for Steels / Stainless. For aluminium MIG welding, you'd need to move up to the VIPER 182 Mk II.

So do you need an aluminium spool gun or can you use the normal mig touch if I bought the viper 185

Hi John. You can do either. If you want to use a regular MIG torch, you'll just need to change the torch liner over to an aluminium torch liner, as well as use aluminium contact tips.

Thanks guys I’m not happy with myself should of looked into it before I bought the viper 120 I just thought you could of changed the liner in any mig anyway thanks guys

Hi Daniel, this definitely sounds like a warranty claim if you've only had it for three months, particularly if you are getting a heat warning right from the start. Take it back for a replacement.

Hi Daniel, Our service team will be able to help you with that, give (02) 9780 4200 a call, and select service (Option 2). You can also send them an email at service@unimig.com.au

All good returned to total tools and its on its way to uni mig

For Stainless Steel

Go to your nearest Bunnings as they have the best range 1kg reels of gassless mig wire I know of, they might have it if it exists.

don't think so never seen in bunnings or total tools if you find some let the world know wayne

Yes, mine came with one reel of 0.8 gassless wire included. Bunnings sell it.

Yes it did, question was for stainless steel

no chart just let viper do the job

No I don’t, I put up to 3/4 strength power for 5-6mm plate and down to about 1/4 power for 2mm. As Wayne said, just let the viper do the job. Every mig welder needs adjustment for metal thickness until you get to know your welder and what settings are best, a chart is only a guide.

Absolutely...

The safe maximum length is 'Absolutely..'. Does this mean that you can use an extension lead of infinite length?

Hi Kyle, the VIPER 120 SYNERGIC can only weld Mild Steel or Stainless Steel.

Hi Stevie, the maximum thickness you can weld is 6mm.

Hi Lindsay, I can confirm that the VIPER 120 can run Stainless Steel wire.

Hi mate, how thick is the material you will be working with?

The welder is good for 4mm steel, which should be sufficient for a stock crate. Whether the welds will be strong enough is down to the person using the welder and not the welder itself.

Hi Steve, not that machine mate it’s designed for steel only. For aluminium I would recommend our Viper 185 external link