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Old 08-04-2014, 10:05 PM   #1
lilbill
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Default Anybody familiar with this welder ?

i bought this off craigslist today the seller knew nothing about it. Air Products AC/DC 150 amp welder does arc and tig. good,bad,ugly ? i gave $300 for all of it. helmet is new.
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Old 08-04-2014, 11:14 PM   #2
Destralo Roach
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Default Re: Anybody familiar with this welder ?

I could be wrong but I think thats early Miller...
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Old 08-04-2014, 11:17 PM   #3
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Default Re: Anybody familiar with this welder ?

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Originally Posted by Destralo Roach View Post
I could be wrong but I think thats early Miller...
i read that miller made some stuff for air products . any guess as to model or age ?
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Old 08-04-2014, 11:43 PM   #4
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Default Re: Anybody familiar with this welder ?

I just had a 185 220 that was from the 1970's pree motor driven.. couldnt find any info on it either...

I'd say no later than the 70's
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Old 08-05-2014, 12:23 AM   #5
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Default Re: Anybody familiar with this welder ?

i had an Air that looked damn near like that. is there a plate on the back with the serial # and model #?
replacement parts for mine came from the local Miller dealer. it was a pretty good machine for tig on steel / stainless. never got it running great on aluminum (i was used to a high frequency machine).

i'd happily still have it today if it hadn't been stolen
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Old 08-05-2014, 09:31 AM   #6
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Default Re: Anybody familiar with this welder ?

Looks like a steal . The hood - bottle and leads are worth a couple hundred
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Old 08-05-2014, 10:30 AM   #7
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Default Re: Anybody familiar with this welder ?

If it works, good buy.

Those older machines work well and in some cases can produce a smoother arc. There is little to go wrong with them.

Usually a scratch start with DC welding. You can use the high frequency with DC to help start the arc but it's real function is to stabilize the arc with AC. 150 Amps won't weld much beyond 1/8 to 3/16 aluminum without a ton of preheat.
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Old 08-05-2014, 10:43 AM   #8
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Default Re: Anybody familiar with this welder ?

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Originally Posted by ELpolacko View Post
If it works, good buy.

Those older machines work well and in some cases can produce a smoother arc. There is little to go wrong with them.

Usually a scratch start with DC welding. You can use the high frequency with DC to help start the arc but it's real function is to stabilize the arc with AC. 150 Amps won't weld much beyond 1/8 to 3/16 aluminum without a ton of preheat.
i'm new to tig and even after years of practice i'm still an amatuer with gas, arc and mig. i am pretty good with a torch on light gauge stuff though.
i've wanted a tig for awhile so i could play with stainless . i've got buddies that are real welders to handle what little aluminum i mess with. this thing weighs a frikin ton and i've heard the old copper wound machines were good ones, i just never heard of air products brand.
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Old 08-05-2014, 11:07 AM   #9
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Default Re: Anybody familiar with this welder ?

Bill,
It looks like it might be similar in features and power to a Miller Econo-Tig which is a nice little machine, at least I'm happy with mine. It ought to work real good on your stainless stuff, and you'll probably end up find your self tackling some aluminum with it too, which it should handle although heavier sections will require some auxilliary pre-heat. Our welding background and experience sounds pretty similar, I never got into TIG until after spending most of my life welding with stick, gas, or MIG. I was pretty amazed by the control TIG gave me over the weld puddle. Have fun with it .

Geo.
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Old 08-05-2014, 11:12 AM   #10
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Default Re: Anybody familiar with this welder ?

The newer machines have smaller transformers in them and use electronic circuitry to profile the arc.

When I first started to learn TIG back in the mid 80s the shop had an actual HeliArc machine from the Linde corp. Watercooled by hooking it to the city water supply and dumped out in the back yard. Scratch start only, the knob on the torch controlled your gas supply, no gas lenses or such fancy stuff. You had to know your shit, pick the right amp setting and you changed your speed and to some extent torch height and filler rod insertion to control your heat. Not unlike using a gas torch, your machine is like that.

I now have two Miller Syncrowaves. One 250 Tigruner package and a 200 aircooled. Both are very sweet machines. My 250 is about 15 years old now and have only had to do routine maintenance and the 200 is about 6-7 years now. I bought it used from a failed 4X4 Fab shop with about 50 hours on it for $1500.00 and the only thing I would want different is to put a Tigrunner package on it. That aircooled torch gets hot!
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Old 08-05-2014, 11:19 AM   #11
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Default Re: Anybody familiar with this welder ?

thanks for the input guys. i do believe this is the miller version of this welder : http://www.sterlingmachinery.com/637...er+Econo+Twin/
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Old 08-05-2014, 11:29 AM   #12
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Default Re: Anybody familiar with this welder ?

^^^it sure does. I can't tell from your pics, but do you have a control on your torch head or is it scratch-start and full-bore only?
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Old 08-05-2014, 01:10 PM   #13
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Default Re: Anybody familiar with this welder ?

My employee Dr Marvelus has the EconoTwin with the High Freq just like yours. Not a terrible machine.

Follow him on IG if you like: http://instagram.com/Dr_marvelus
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Old 08-05-2014, 01:31 PM   #14
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Default Re: Anybody familiar with this welder ?

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Originally Posted by old.wrench View Post
^^^it sure does. I can't tell from your pics, but do you have a control on your torch head or is it scratch-start and full-bore only?
you got me, i'm new to this shit, remember ? here's some pics of both ends of the tig torch, shouldn't there be wires on this ?
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Old 08-05-2014, 03:58 PM   #15
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Default Re: Anybody familiar with this welder ?

Water cooled torch.

The knob should control gas flow.

The high frequency should be an on-off thing and not dependent on arc starting. Usually in DC mode it should be scratch start.
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Old 08-05-2014, 08:33 PM   #16
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Default Re: Anybody familiar with this welder ?

You have a gas valve on your torch head,and you use the brass connector to go to your argon tank and you attach your stick rod stinger to the loop on the connector to get your power to the torch head.Your torch lead carries the current through the casing which is shielded with metal.
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Old 08-05-2014, 08:36 PM   #17
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Default Re: Anybody familiar with this welder ?

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You have a gas valve on your torch head,and you use the brass connector to go to your argon tank and you attach your stick rod stinger to the loop on the connector to get your power to the torch head.Your torch lead carries the current through the casing which is shielded with metal.
Shit, you're right.
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Old 08-05-2014, 09:41 PM   #18
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Default Re: Anybody familiar with this welder ?

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Originally Posted by nmaineron View Post
You have a gas valve on your torch head,and you use the brass connector to go to your argon tank and you attach your stick rod stinger to the loop on the connector to get your power to the torch head.Your torch lead carries the current through the casing which is shielded with metal.
ah so. you say connect the stick rod stinger to the loop. just clamp it with the rod holder or does it attach to the output socket on the machine ?
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Old 08-05-2014, 10:42 PM   #19
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Default Re: Anybody familiar with this welder ?

found this pic in the owners manual pdf. looks like there is an adapter that bolts to the torch cable and plugs into the stinger socket ?
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Old 08-05-2014, 11:26 PM   #20
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Default Re: Anybody familiar with this welder ?

ok i think this thread has gone on long enough...

On with the Motorcycles........

Roach.
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