The difference between my project and yours, if I am not missing
anything, is that you have a filter and I do not, and, also, I have a
heat exchanger and fan (like a radiator) for cooling and you do not.
As far as safety (having the torch cooler running when welding), I
simply plug mine into my welder's AC output. Said output is powered up
by my microcontroller at the proper moment.
Looks like you use the same kind of laundry detergent I use, too!
Great minds smell alike, right? :)
I just got started with a little "scratch start" TIG unit, but it is
Scratch start just seems ridiculous! (it was a lot cheaper than a cooler
version, though) Seems to me as soon as you start your arc with that
scratch, you've already fouled your tungsten! Thoughts?
"Grant Erw> Check it out, guys ..
Igor, yours is a whole lot more complex than mine! The only reason I'm
using a filter is that I figure crud is inevitable in a metal shop,
also there's a reason all that stuff clogged up the pump in its former
life (on a Bernard torch cart at Boeing).
I see how your pump is switched, but if the torch gets warm, it seems like
you'd want to keep water running through it for awhile after postflow
I may cut a square of plywood to sit between my bucket and the pump,
and put some carpet on it, that's a good idea.
Not really, I only have the extra radiator and a fan.
Maybe that is true. For myself, I decide that since the whole system
is isolated, (tight lid on the bucket) there is not much crud that
could get into the system. Also, crud would hopefully stay at the
I turn it on when I begin preflow, and turn it off when I turn off
postflow, that seems to work out okay so far.
The "put carpet under everything that vibrates" is an idea that I
learned from Gunner. It works exceedingly well.
High-Freq is the way to go. Lift-arc and scratch starting can both
stick your tungsten to the work, and can contaminate both the tungsten
and the weld pool.
You'll find that your electrodes last a lot longer with high-frequency
Dang, dang, dang. I saw a carbonator pump the other day at a yard sale for
$2, and thought, "What in the world would I EVER use one of those for?"
Just like tossing "stuff". Within three days I need EXACTLY that "stuff".
Whats that - blue can - dog briskets or food ? I have some white ones with
'green sand' and stuff within.
Looks like a good general purpose concept for most cooling.
Hum - mill, lathe, saw, TIG. I think I'd have one for machines and a clean
one for the TIG - notice the filter...
Martin H. Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
TSRA, Life; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal.
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member.
The more surface area of liquid exposed to the CO2 gas, and the more
stirring, the faster the CO2 dissolves. In soda fountains they use a
small water tank partly full of water and partly full of CO2 gas under
pressure, and the pump draws liquid out and sprays it back in to get
lots of surface area and mixing. Otherwise the tank would have to be
MUCH bigger to get the water carbonated fast enough for a reasonable
flow rate out of the fountain and into a glass :-). I assume they draw
liquid from the bottom and dump the return in the top of the tank, but I
guess they could just put the liquid back in the bottom. Not sure how
they regulate the water level in the tank.
Carl Ijames carl dott ijames aat verizon dott net
(remove nospm or make the obvious changes before replying)
That looks good!
One thing to look out for on the carbonator pumps is that they need a
high pressure bypass or pressure regulator before the torch. The pump I
used (which looks pretty similar to yours) will pump 90+ PSI into the
restriction that my torch provided. The torch (a Weldcraft WP20) is only
rated at 60PSI input pressure. If nothing else, you might put a pressure
gauge on the pump outlet.
There's an actual Bernard water cooler on our local craigslist for $100, so
I ran down there today to take a look. There is no regulator whatever on it.
There is a dial but I think it indicated coolant temperature, not pressure.
I read the manual for my water-cooled torch, and also the CK Worldwide torch
specifications. Neither specified a max pressure.
I modeled my setup after Ernie's. Ernie has used his daily for many years
with many TIG torches and to my knowledge has never had any problem stemming
from unregulated water pressure.
I think I'll just stay away from Weldcraft torches. :-)