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Posted by fran...123 on January 6, 2009, 10:42 am
Please log in for more thread options
Hi,
I have been looking at specifications of some commercial dc inverter welders
like Lincoln invertec 275 or Miller CST 280 and notice that the welding
voltage is somewhere around 28 and for the tig specific machines it is more
like 14.
I was wondering if anyone here would know if there really is any difference
in the characteristics. I like the big fat electrodes like 7024 or 7018 in
flat position as much as possible or tig for small stuff or when I really
hate splatter which is quite often besides I have hundreds of pounds of
steel tig wire. I currently have a Murex transformer welder which I was
told by the welder repair place where I once got a after flow relay it was
an airco re branded. As best as I can tell it says welding voltage of 40
volts on the back. I really can't tell the difference from medium range and
big dial lower Vs high range with big dial lower. Generally there is
supposed to be some difference at least for the dc generator type. I don't
intend on getting rid of my dinosaur but want something for another
location. Don't need any solenoids intend on using an argon water shut off
to hang the torch on.
Thanks
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Posted by Ernie Leimkuhler on January 7, 2009, 12:17 am
Please log in for more thread options
> Hi,
>
> I have been looking at specifications of some commercial dc inverter welders
> like Lincoln invertec 275 or Miller CST 280 and notice that the welding
> voltage is somewhere around 28 and for the tig specific machines it is more
> like 14.
>
> I was wondering if anyone here would know if there really is any difference
> in the characteristics. I like the big fat electrodes like 7024 or 7018 in
> flat position as much as possible or tig for small stuff or when I really
> hate splatter which is quite often besides I have hundreds of pounds of
> steel tig wire. I currently have a Murex transformer welder which I was
> told by the welder repair place where I once got a after flow relay it was
> an airco re branded. As best as I can tell it says welding voltage of 40
> volts on the back.
That is likely the Open Circuit Voltage, or OCV.
Welding voltage will be lower, but a high OCV makes many stick
electrodes happier, such as 6010 and 7018.
> I really can't tell the difference from medium range and
> big dial lower Vs high range with big dial lower. Generally there is
> supposed to be some difference at least for the dc generator type. I don't
> intend on getting rid of my dinosaur but want something for another
> location. Don't need any solenoids intend on using an argon water shut off
> to hang the torch on.
>
> Thanks
>
>
>
The CST 280 is a really nice Stick machine.
I got the school to buy one 3 years ago, and it has been great.
It is only a rudimentary TIG welder, but can accept a foot pedal.
It has no gas solenoid, and only has Lift-Arc TIG start, and it is
restricted to 220 volt - 460 volt, single, singel or 3 phase.
If you want a really good DC TIG machine, that is also a really good
Stick machine, and don't need the higher amps, I recommend the Maxstar
200 SD.
It has High Freq. start, digital readout, can weld from 1 - 200 amps,
has the gas solenoid, and because it has "Autoline" it can run on any
voltage from 120 volt to 460 volt, single or 3 phase, 50 or 60 hz.
At $2500 it is a bit more than the CST 280, which lists around $2300,
but is a more versatile machine.
I have had a Maxstar 200 DX (DX means it has the pulser/sequencer) for
7 years and absolutely love it.
I have done a lot of structural welding with it and routinely do onsite
Stainless TIG for brewery repairs.
In Stick mode it runs 6010 and 7018 like butter.
The 200 DX runs around $2800, the SD is around $2500.
Their simpler little brother is the Maxstar 200 STR which is really
just a smaller CST 280 since it is a stick machine with basic TIG, but
it does still have Autoline, and only costs around $1650.
I got the school to buy one last summer for campus repairs so I could
bring my 200DX home.
So far it has been another excellent machine.
Where it comes to Inverters I believe Miller really has the better
technology.
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Posted by TinLizziedl on January 7, 2009, 1:14 am
Please log in for more thread options Yep, what he said. We have Maxstar 200 DX machines everywhere in the
shipyard, and I love 'em! Great for stick and tig, I love having a
machine I can trust to keep running, whether it's at 30 A for really
small tig, or 200 A for lightweight (1/4") CAC.
From personal experience over the last 4 years, I want a Miller MaxStar
200 DX a little more than I want my two front teeth!
--
Tin Lizzie
"Elephant: A mouse built to government specifications."-Lazarus Long
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Posted by fran...123 on January 7, 2009, 11:02 am
Please log in for more thread options
Ernie Leimkuhler wrote in message
>
>> Hi,
>>
>> I have been looking at specifications of some commercial dc inverter
welders
>> like Lincoln invertec 275 or Miller CST 280 and notice that the welding
>> voltage is somewhere around 28 and for the tig specific machines it is
more
>> like 14.
>>
>> I was wondering if anyone here would know if there really is any
difference
>> in the characteristics. I like the big fat electrodes like 7024 or 7018
in
>> flat position as much as possible or tig for small stuff or when I really
>> hate splatter which is quite often besides I have hundreds of pounds of
>> steel tig wire. I currently have a Murex transformer welder which I was
>> told by the welder repair place where I once got a after flow relay it
was
>> an airco re branded. As best as I can tell it says welding voltage of 40
>> volts on the back.
>
>That is likely the Open Circuit Voltage, or OCV.
>Welding voltage will be lower, but a high OCV makes many stick
>electrodes happier, such as 6010 and 7018.
>
>> I really can't tell the difference from medium range and
>> big dial lower Vs high range with big dial lower. Generally there is
>> supposed to be some difference at least for the dc generator type. I
don't
>> intend on getting rid of my dinosaur but want something for another
>> location. Don't need any solenoids intend on using an argon water shut
off
>> to hang the torch on.
>>
>> Thanks
>>
>>
>>
>
>The CST 280 is a really nice Stick machine.
>I got the school to buy one 3 years ago, and it has been great.
>It is only a rudimentary TIG welder, but can accept a foot pedal.
>It has no gas solenoid, and only has Lift-Arc TIG start, and it is
>restricted to 220 volt - 460 volt, single, singel or 3 phase.
>
>If you want a really good DC TIG machine, that is also a really good
>Stick machine, and don't need the higher amps, I recommend the Maxstar
>200 SD.
>It has High Freq. start, digital readout, can weld from 1 - 200 amps,
>has the gas solenoid, and because it has "Autoline" it can run on any
>voltage from 120 volt to 460 volt, single or 3 phase, 50 or 60 hz.
>At $2500 it is a bit more than the CST 280, which lists around $2300,
>but is a more versatile machine.
>I have had a Maxstar 200 DX (DX means it has the pulser/sequencer) for
>7 years and absolutely love it.
>I have done a lot of structural welding with it and routinely do onsite
>Stainless TIG for brewery repairs.
>In Stick mode it runs 6010 and 7018 like butter.
>The 200 DX runs around $2800, the SD is around $2500.
>
>Their simpler little brother is the Maxstar 200 STR which is really
>just a smaller CST 280 since it is a stick machine with basic TIG, but
>it does still have Autoline, and only costs around $1650.
>I got the school to buy one last summer for campus repairs so I could
>bring my 200DX home.
>So far it has been another excellent machine.
>
>Where it comes to Inverters I believe Miller really has the better
>technology.
The question I was after was the maxstar ones rate tig at 16 volts give or
take and stick at 25 volts give or take while the cst 280 rates both
processes at 26 volts for comparable amps connected to single phase, so
what is the difference going to be at say 150 amps on tig using the one
which only has 26 volts and the other which when set on tig is at 16 volts.
Whether it is miller Lincoln thermal arc model choices are similar. I have
been known to use helium or helium mix as well. The rod I have is E70s-6.
The welder I have now will draw 91 amps at 230 volts probably something like
400 amps output and that is where (pretty sure) it is rated at 40 volts I
think the open circuit is like 80 volts. It has high frequency and I have a
super separate box for high frequency since I don't think the one in the
machine works that great however just scratch start or scratch start on a
piece of copper isn't all that bad if the buzzing noise is annoying.
I see the maxstar models don't de rate on single phase, I had a color
brochure a few years ago and thought they did. The cst 280 is really only
good for 200 on single phase the way the specs look and weight wise has less
stuff in it than the invertec 275.
http://www.millerwelds.com/pdf/spec_sheets/DC29-5.pdf maxstar200str
http://www.millerwelds.com/pdf/spec_sheets/DC32-0.pdf maxstar200 sd lx dx
http://www.millerwelds.com/pdf/spec_sheets/DC29-55.pdf cst 280
Fran
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Posted by Ernie Leimkuhler on January 7, 2009, 10:57 pm
Please log in for more thread options
> Ernie Leimkuhler wrote in message
> >
> >> Hi,
> >>
> >> I have been looking at specifications of some commercial dc inverter
> welders
> >> like Lincoln invertec 275 or Miller CST 280 and notice that the welding
> >> voltage is somewhere around 28 and for the tig specific machines it is
> more
> >> like 14.
> >>
> >> I was wondering if anyone here would know if there really is any
> difference
> >> in the characteristics. I like the big fat electrodes like 7024 or 7018
> in
> >> flat position as much as possible or tig for small stuff or when I really
> >> hate splatter which is quite often besides I have hundreds of pounds of
> >> steel tig wire. I currently have a Murex transformer welder which I was
> >> told by the welder repair place where I once got a after flow relay it
> was
> >> an airco re branded. As best as I can tell it says welding voltage of 40
> >> volts on the back.
> >
> >That is likely the Open Circuit Voltage, or OCV.
> >Welding voltage will be lower, but a high OCV makes many stick
> >electrodes happier, such as 6010 and 7018.
> >
> >> I really can't tell the difference from medium range and
> >> big dial lower Vs high range with big dial lower. Generally there is
> >> supposed to be some difference at least for the dc generator type. I
> don't
> >> intend on getting rid of my dinosaur but want something for another
> >> location. Don't need any solenoids intend on using an argon water shut
> off
> >> to hang the torch on.
> >>
> >> Thanks
> >>
> >>
> >>
> >
> >The CST 280 is a really nice Stick machine.
> >I got the school to buy one 3 years ago, and it has been great.
> >It is only a rudimentary TIG welder, but can accept a foot pedal.
> >It has no gas solenoid, and only has Lift-Arc TIG start, and it is
> >restricted to 220 volt - 460 volt, single, singel or 3 phase.
> >
> >If you want a really good DC TIG machine, that is also a really good
> >Stick machine, and don't need the higher amps, I recommend the Maxstar
> >200 SD.
> >It has High Freq. start, digital readout, can weld from 1 - 200 amps,
> >has the gas solenoid, and because it has "Autoline" it can run on any
> >voltage from 120 volt to 460 volt, single or 3 phase, 50 or 60 hz.
> >At $2500 it is a bit more than the CST 280, which lists around $2300,
> >but is a more versatile machine.
> >I have had a Maxstar 200 DX (DX means it has the pulser/sequencer) for
> >7 years and absolutely love it.
> >I have done a lot of structural welding with it and routinely do onsite
> >Stainless TIG for brewery repairs.
> >In Stick mode it runs 6010 and 7018 like butter.
> >The 200 DX runs around $2800, the SD is around $2500.
> >
> >Their simpler little brother is the Maxstar 200 STR which is really
> >just a smaller CST 280 since it is a stick machine with basic TIG, but
> >it does still have Autoline, and only costs around $1650.
> >I got the school to buy one last summer for campus repairs so I could
> >bring my 200DX home.
> >So far it has been another excellent machine.
> >
> >Where it comes to Inverters I believe Miller really has the better
> >technology.
>
>
>
> The question I was after was the maxstar ones rate tig at 16 volts give or
> take and stick at 25 volts give or take while the cst 280 rates both
> processes at 26 volts for comparable amps connected to single phase, so
> what is the difference going to be at say 150 amps on tig using the one
> which only has 26 volts and the other which when set on tig is at 16 volts.
> Whether it is miller Lincoln thermal arc model choices are similar. I have
> been known to use helium or helium mix as well. The rod I have is E70s-6.
>
> The welder I have now will draw 91 amps at 230 volts probably something like
> 400 amps output and that is where (pretty sure) it is rated at 40 volts I
> think the open circuit is like 80 volts. It has high frequency and I have a
> super separate box for high frequency since I don't think the one in the
> machine works that great however just scratch start or scratch start on a
> piece of copper isn't all that bad if the buzzing noise is annoying.
>
> I see the maxstar models don't de rate on single phase, I had a color
> brochure a few years ago and thought they did. The cst 280 is really only
> good for 200 on single phase the way the specs look and weight wise has less
> stuff in it than the invertec 275.
>
> http://www.millerwelds.com/pdf/spec_sheets/DC29-5.pdf maxstar200str
> http://www.millerwelds.com/pdf/spec_sheets/DC32-0.pdf maxstar200 sd lx dx
> http://www.millerwelds.com/pdf/spec_sheets/DC29-55.pdf cst 280
>
>
Well I am not sure how to answer you.
I can say that having used a LOT of machines: inverters, generators and
transformers, I love the way the Maxstar runs stick, and TIG.
Smooth and precise.
Lincoln's large Inverters are OK, but I still prefer Miller.
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>
> I have been looking at specifications of some commercial dc inverter welders
> like Lincoln invertec 275 or Miller CST 280 and notice that the welding
> voltage is somewhere around 28 and for the tig specific machines it is more
> like 14.
>
> I was wondering if anyone here would know if there really is any difference
> in the characteristics. I like the big fat electrodes like 7024 or 7018 in
> flat position as much as possible or tig for small stuff or when I really
> hate splatter which is quite often besides I have hundreds of pounds of
> steel tig wire. I currently have a Murex transformer welder which I was
> told by the welder repair place where I once got a after flow relay it was
> an airco re branded. As best as I can tell it says welding voltage of 40
> volts on the back.