Mansfield
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| posted on 3/11/07 at 07:22 PM |
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My TIG is here too! Trials are promising.
I won one of the Rehmann TIG160 units last week (Friday) and it was here on Wednesday. All as advertised - top service.
From the first arc I struck I could tell that TIG was for me, at last I can see a proper weld pool! Hello instant and controllable weld pool. MIG is
too quick for me.
I haven't got any filler rod and only a mini bottle of argon so the trials were limited but all seems well.
I didn't really have a clue on set up, it was all done one 55 amps, gas was a hiss, 1.6mm gold end (universal?) tungsten, pressure was a bit of a
hiss. All this was done on a 5 amp fuse as that was all I had.
One of the things I really like about the unit (apart from the price  ) is the length of the power and torch leads - the welder can live in the
middle of the garage and the torch can reach all around a chassis. Great for those weld one side then the other distortion cancelling moves.
Obviously I need proper gas, filler wire and LOTS of practice but I am pleased with the operation of the machine and the process.
Here are some pictures, no filler rod but it is a weld.
 
Description
 
Description
Dont really know what all this aero is about, seemed to be worse when I held the weld pool to long. Hardly worth worrying about at this stage with
such a ropey set up.
 
Description
Penetration is there if a little blurry.
 
Description
I think this weld is exhibiting something called 'tungsten inclusions'.
 
Description
Big thanks to 907 for your help thoughout the should I, shouldn't I process and to the_fbi for buying one in the first place - a good move I
think.
David
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Confused but excited.
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| posted on 3/11/07 at 07:27 PM |
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Niiiice.
Bugger, now I want one as well!
Tell them about the bent treacle edges!
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mark chandler
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| posted on 3/11/07 at 07:34 PM |
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Gas with hiss, that will deplete your bottle quickly, you need just a tad of gas to protect the work so keep turning it down to a whisper.
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Mansfield
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| posted on 3/11/07 at 07:36 PM |
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They have gone as low as £88, high as £155, mine was £122 (all plus £11 postage).
Go on - you know you want to.
I am glad I did, dont know if I will be if I have to test the warranty though.
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Mansfield
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| posted on 3/11/07 at 07:49 PM |
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I couldn't really hear the hiss over the HF start noise so I just turned it up and it seemed to work.
Today was just to see if the unit worked before I commit the same money again to an argon rental contract.
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short track 123
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| posted on 3/11/07 at 08:24 PM |
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On steel about 5 or 6 LPM of gas flow should be a good starting point.
MiG wire ( if you have some ) will be fine to use as well. But can be a bit of a hassle making it straight.
Hope this helps
Jason
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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tks
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| posted on 3/11/07 at 08:30 PM |
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ok,
think about the fact that the more time you take the more heat is in your peace and thats often for a chasis not good.
thats the reason that mig is more often used because its faster and "colder"
also think that if you don't apply rod, you eat meat away and your welding HIGH isn't much.
The above comments are always meant to be from the above persons perspective.
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big_wasa
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| posted on 3/11/07 at 10:19 PM |
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I really want to try tig and didnt think you could get one with Hf for that sort of dosh, with out shipping from china 
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Mansfield
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| posted on 3/11/07 at 10:25 PM |
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You are not that far from me, welcome to have a try with my kit.
Very different to MIG more like super lovely gas welding from my first impressions.
U2U me if you want a go.
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big_wasa
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| posted on 3/11/07 at 10:38 PM |
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cheers, may take you up on it when im not so busy.
Ive only done an hour or so on Gas, and that was years ago.
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the_fbi
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| posted on 3/11/07 at 10:45 PM |
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This video is well worth watching. I've not used mine for Tig yet, but a very very good set of lessons and info.
http://thepiratebay.org/tor/3647745/Covell_TIG_Welding_Basics_(imburne)
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Mansfield
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| posted on 3/11/07 at 11:06 PM |
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I cant get that link to work properly, some of the spin offs from that link look interesting though.
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Mansfield
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| posted on 3/11/07 at 11:08 PM |
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Offer is open anytime big_wasa, would be much better when I have some proper gas and filler rod.
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907
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| posted on 3/11/07 at 11:59 PM |
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Hi David,
Considering you didn't use filler wire that is a cracking first go with a Tig. 
When you get some, you will find that those little pin holes will no longer be a problem.
I've had several U2U's about these welders and if I have been of help to any of you then I'm a happy bunny.
So, get out there, get welding, and next time there's a poll "scratch build or kit" lets see a few more votes for the chassis
builders.
Who was it that had a sig, "Kits are for Girls"? 
(No offence intended)
Good luck to all
Paul G
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wilkingj
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| posted on 4/11/07 at 10:01 AM |
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I got a Rehmann as well.. Thanks to 907 for the advice.
I got this link from a welding forum...
Its a calculator for TIG Welding currents.
Obvioulsy for Miller Welders, but a good starting point for anything else.
Hope its of use to anyone on here.
Linky
[Edited on 4/11/2007 by wilkingj]
1. The point of a journey is not to arrive.
2. Never take life seriously. Nobody gets out alive anyway.
Best Regards
Geoff
http://www.v8viento.co.uk
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D Beddows
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| posted on 4/11/07 at 08:49 PM |
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Well I've just joined the Rehmann club as well - after reading the last couple of TIG threads and considering the price it's hard to
resist
I can MIG weld to a decent standard but I've never enjoyed it , always much preferred gas for the control you get and the look of the finished
weld so I'm really looking forward to giving TIG a go
Kits are indeed for girls! - no offense to girls intended
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Confused but excited.
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| posted on 4/11/07 at 09:27 PM |
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You are soooo dead, when Fozzie reads this! 
Tell them about the bent treacle edges!
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Alex B
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| posted on 5/11/07 at 12:13 AM |
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Why? ........has he had a sex change.
Are the units Chinese right enough? I heard they had been reported to Ebay for the Made in Germany thing.
Alex
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D Beddows
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| posted on 5/11/07 at 08:55 AM |
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For the price I don't really think it matters 
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Alex B
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| posted on 5/11/07 at 10:00 AM |
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Too true mate........just wondered if it was going to come to an end because of this.
Alex
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wilkingj
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| posted on 5/11/07 at 11:20 AM |
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quote:
Originally posted by Alex B
Are the units Chinese right enough? I heard they had been reported to Ebay for the Made in Germany thing.
Alex
From the advert:
This machine has been developed by
famous German Welding producer REHMANN as a combination
in order to provide TIG workstations and electrode manual
welding stations with high-quality, yet reasonably priced equipment ... blah blah...
The heart of the device is an IGBT inverter made by SIEMENS and based on transistor technology, which is much more sturdy
and durable than the MOS-FET electronics currently used in many Chinese inexpensive lightweight inverters.
It says developed by Rehmann, not MADE.
The Inverter is Made by Siemens.
It doesnt say WHERE.
Now Siemens may or may not have a factory in China.
I have had the lid off mine before I even powered it up. Being a Radio Ham of some 25 years, Ive looked inside a fair few bits of kit.
It Looks far eastern, but nearly all the chips have numbers that I recognise. I wouldnt go as far as saying its Top quality, ie no Brand Name chips
etc. But its certainly very reasonable for the money.
My logic went like this:
My SIP150 Mig cost me £225 about 8 years ago. It has saved / made me several times that in saved money, and jobs done for next to nowt, and items
repaired, ie Kids bikes, Lawnmower etc etc etc.
I got my 200 Amp Rehman for £185 + £12 postage. I consider that very reasonable.
Does it REALLY MATTER where it was made?
As long as it works and give reasonable results for less than £200 its got to be a bargain.
I have seen the 200 Amp on going for £241 at the most (so far), their buy It Now price is £345 for the 200 Amp and £255 for the 160 Amp jobs.
Mine works just fine. I'm not overly impressed by the way they generate the HF... Its basically a spark transmitter! Look thru the vents when
you start to weld, you can see the spark gap providing the HF Start. However, crude - yes, but it does work well.
So far, its a reasonable bit of kit.
If it goes Bang... then I only lost a couple of hundred squids, not the best part of a grand.
EDIT:
At source (in China) a 200Amp Tig is $140 See
LINKY
Add Postage of a 23kg package, ship half way round the world, Add VAT, and someones profit. Its still a pretty good price.
[Edited on 5/11/2007 by wilkingj]
1. The point of a journey is not to arrive.
2. Never take life seriously. Nobody gets out alive anyway.
Best Regards
Geoff
http://www.v8viento.co.uk
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JonBowden
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| posted on 5/11/07 at 01:56 PM |
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last time I did anything with electronics, a MOS-FET was a transistor
Jon
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tks
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| posted on 5/11/07 at 01:59 PM |
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nope thats never been the case!
the principles of a transistor and a MOSFET are totally different..
a mosfet needs a charge of current to conduct.
and a transistor needs a flow of current to conduct. the hFe then decides how much current it lets go past.
in a mosfet its just everything or nothing..
(when fully or not charged)
Tks
The above comments are always meant to be from the above persons perspective.
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iank
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| posted on 5/11/07 at 02:10 PM |
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You might want to look up what the T in MOSFET stands for
Though Field Effect Transistors do work completely differently than bipolar Transistors.
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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Alex B
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| posted on 5/11/07 at 02:12 PM |
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Excellent Wilk..........power to the people......
Alex
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