So, what is the considered opinion of the group as to the importance of the
direction of the grind? Thanks!
Aligning the grooves along the axis of the tungsten;
The current flow along wires and tungsten is along the outer surface (mostly
or totally? faded memory at work here). So grooves along the axis will have
less resistance to current flow and provide you with an arc that is more
stable.
Grooves across the axis increase the resistance to current flow, as well as
providing multiple locations for an arc to form, giving you a rougher arc.
From my very limited experience with TIG welding I have noticed a difference
but it is not something that may jump out at you.
If I am way off please feel free to jump all over it.
Thank You
John Noon
"Jeff Nelson" <jeff_...@agilent.com> wrote in message
news:10306399...@cswreg.cos.agilent.com...
Gary
I new my memory was coming up short just not where. Never even thought of DC
or HF current and with TIG that would be important.
This also explains why I would notice a difference in grinding method only
part of the time. Someone may ask why I was grinding my tungsten's wrong, I
was trying to determine what differences it would create in the finished
weld. This is what happens when you get bored, I even experimented with
asymmetrical grinding to see if it would be possible to aim the arc off to
one side.
John Noon
"Gary Coffman" <ke...@bellsouth.net> wrote in message
news:aunsmu828orsai1mj...@4ax.com...
Ciao,
David Todtman
You will find that if you grind the tungsten, with all grind scratch marks in
line with the tungsten, that you will get better control, and easier starts,
especially at low amperages or on an older TIG machine with iffy High freq.
Personally I prefer to point the tungsten up, rather than down, so no burr forms
at the tip of the tungsten.
Give yourself every advantage possible.
Go here for the full write up.
Pro-Fusion - Tungsten Data http://www.Pro-FusionOnline.com/tungsten/
There are a lot of bad habits in industry because some guy figured out that he
"can get away with it".
He then tells his buddies and pretty soon they all think they "can get away
with it ".
That does not make it good practice or worth emulating.
Trust the experts here.
Welding engineers spend a long time coming up with stuff, and it is not hooey.
Some welding engineers actually know what they are talking about.
--
--
The difference between genius and stupidity is that genius has it's limits....
(Albert Einstein)
Smaller equipment is far more practical when trying to get into tight areas.
Which explains why something like this is never mentioned in books.
John
"David Todtman" <dtodtmanR...@shaw.ca> wrote in message
news:KMvb9.229765$f05.12...@news1.calgary.shaw.ca...
Jeff,
You have asked something that you will get a number of suggestions as
to the right way, what matters and what doesn't. Some of this you
will have to figure out yourself. With that said, I will give you my
thoughts. I believe in doing everything the best I can. I take great
pain in doing the best grind I can on every tungsten I prepare. Most
of the welds I do have something to do with aircraft. People fly in
them and they fly over many more. It has to do with getting the best
out of everything you do. If you shortchange any part of your work
then you have not done the best you can. If you are working on things
that do not put anyone at risk then do what you want, however, if
someone's safety depends on your work then be sure it is the best you
can do.
Just my two cents worth!
Eric D
Pat