Larry Jaques wrote:
On Fri, 30 Sep 2016 17:11:58 -0700, Gunner Asch
wrote:
On Fri, 30 Sep 2016 09:50:33 -0700, wrote:
So, after looking at tubular reviews I decided the TIG 200 was a
good buy.
Are you referring to ewe-tubular reviews, Eric?
Tried it out last night for the first time. Just on 120 volts. I
was able to weld .125 thick 6061 using 3/32 filler rod with no
problems. I fidled with the AC balance and the default 75% setting
works great. I did try the 90% setting and even though it welded
well the weld appearance was not so good, not shiny. Played with the
frequency setting and it was really interesting to watch the arc
width change. I didn't weld much with the DC but did try out the
pulse feature. It is obvious that I will need too learn how to use
the pulse feature but I can see how it will be great for thin
stuff. The high frequency start function works well, it will throw
an arc about 5/8 inch.
I have a few small gripes. It uses an air cooled torch and comes
with regular, not gas lens, cups and so on. The torch is a pretty
good one for an air cooled torch, a model PTA-17F. It has the
flexible head.
I bought gas lens stuff for the torch when I bought the welder. My
first welds were made on steel with the standard cup setup and the
gas flow I usually use with gas lenses. I noticed porosity right
away. Changing to a gas lens and the porosity went away and the weld
appearance improved greatly.
Were you using less or more gas with the standard cup?
The post flow is about 5 seconds and cannot be adjusted. This must
be to cool the torch.
The pedal doesn't have the same feel as the old heavy one for the
Miller welder so I am not sure when I have stepped on it enough to
start the welder. This wouldn't be a problem except there is a
slight delay between stepping on the gas and the arc initiation. A
couple times I didn't think I pressed far enough and the arc
started really hot.
After welding stops if the pedal is pressed right away there is
that damned delay. Another small gripe but I will get used to it.
I am going to make up a water cooling adapter for when the welder
is used in the shop as well as adding a post flow time external to
the machine. I already have the right adjustable time delay relay
so it will be pretty easy (I think) to use the pedal switch to
trigger the time delay relay.
Eric
]
Thanks for the review!
Yes, interesting review.
That 5 second post cool is very important on
a air cooled torch. Remember you are not just cooling the torch, but
the hose/electrode as well. And it can get prettttty warm at the
higher ranges..so you have to pump some gas at it to try to get it
cool.
Newb here. Aren't the delay, and the resultant flow of gas while the
weld cools, necessary to keep the weld from getting brittle? Even my
little $200 Harbor Freight TIG has that post-arc time delay before the
gas shuts off. Wish it had DC and high-freq start. sigh
Do machines with water cooled torches not have that delay?
tilts head
You're right about the gas pre-flow delaying the arc . The pre is to give
the arc some ionized (by the HF) gas to help start as well as shield . The
after is to prevent oxidation as the weld cools . I think the gas lens setup
gives better shielding with less gas than standard cups , at least it seems
that way for me . Also , Jody has some excellent videos on all those
controls and what they do .
The Everlast EX250 I got a couple of years ago has all those bells and
whistles , and his videos have been a really big help to me on how to use
them . It also came with both a new water cooled and a used air cooled
torch that they tossed in for free . I still haven't used the water cooled
one ... but I'm pretty sure the pre flow delay is set by the machine and not
the torch .
--
Snag