Hello,
I have a Hobart Cybertig 300. A couple of years ago it started running
wide open on amperage. It runs the maximum on low, med, or high range.

The potentiometer does nothing to control it and I tried it with and
with out the pedal hooked up.

The Gater board was sent to Innovat for repair and they said it was
ok.

Any help would be appreciated.

JAckal

On Sat, 20 Feb 2010 19:51:10 -0800 (PST), the infamous JAckal
scrawled the following:

Hello,
I have a Hobart Cybertig 300. A couple of years ago it started running
wide open on amperage. It runs the maximum on low, med, or high range.

The potentiometer does nothing to control it and I tried it with and
with out the pedal hooked up.

The Gater board was sent to Innovat for repair and they said it was
ok.

Any help would be appreciated.

Sounds like a shorted pot or pedal. Is that pot on the Gater board or
external to it? (Hopefully external since Innovat cleared the board.)
Can you borrow another pedal to see if it controls the juice?

--
"Just think of the tragedy of teaching children not to doubt."
-- Clarence Darrow

On Feb 21, 9:41*am, Larry Jaques wrote:
On Sat, 20 Feb 2010 19:51:10 -0800 (PST), the infamous JAckal
scrawled the following:

Hello,
I have a Hobart Cybertig 300. A couple of years ago it started running
wide open on amperage. It runs the maximum on low, med, or high range.

The potentiometer does nothing to control it and I tried it with *and
with out the pedal hooked up.

The Gater board was sent to Innovat for repair and they said it was
ok.

Any help would be appreciated.

Sounds like a shorted pot or pedal. *Is that pot on the Gater board or
external to it? *(Hopefully external since Innovat cleared the board.)
Can you borrow another pedal to see if it controls the juice?

--
"Just think of the tragedy of teaching children not to doubt."
* * * * * * * * * * * * * * * * * * * * *-- Clarence Darrow

Yeah the pot is separate, I unhooked the pedal and check it . It is
OK. I put the dummy plug in the front so it would have panel
control.Pot is ok too.

Jackal

On Feb 21, 3:51*am, JAckal wrote:
Hello,
I have a Hobart Cybertig 300. A couple of years ago it started running
wide open on amperage. It runs the maximum on low, med, or high range.

The potentiometer does nothing to control it and I tried it with *and
with out the pedal hooked up.

The Gater board was sent to Innovat for repair and they said it was
ok.

Any help would be appreciated.

JAckal

I helped a friend trouble shoot a Airco Tig welder. Not sure who
really made the welder, I do not think that Airco manufactured it. It
also had a low, medium, and high range and was running the maximum on
all ranges. The control on it used a saturable reactor . The control
board controled a Triac which was mounted next to the control board.
We decided that the triac had failed as a short. So there was maximum
current to the saturable reactor.

Dan

On Sun, 21 Feb 2010 08:06:38 -0800 (PST), the infamous JAckal
scrawled the following:

On Feb 21, 9:41*am, Larry Jaques wrote:

Sounds like a shorted pot or pedal. *Is that pot on the Gater board or
external to it? *(Hopefully external since Innovat cleared the board.)
Can you borrow another pedal to see if it controls the juice?

Yeah the pot is separate, I unhooked the pedal and check it . It is
OK. I put the dummy plug in the front so it would have panel
control.Pot is ok too.

OK, so if it's not in either control, and it's not in the gate board,
then it must be in your wiring. Are you sure that there are no extra
controls or jumpers anywhere (y'know, like a thumb control ready to
reach out and bite your hand? snort) and that the jumpers installed
are absolutely in the correct position? DAMHIKT

Hmm...Is this the same machine you had the same trouble with 2 years
ago? http://www.cnczone.com/forums/showthread.php?t=54698

--
"Just think of the tragedy of teaching children not to doubt."
-- Clarence Darrow

On Feb 21, 12:20*pm, Larry Jaques wrote:
On Sun, 21 Feb 2010 08:06:38 -0800 (PST), the infamous JAckal
scrawled the following:

On Feb 21, 9:41*am, Larry Jaques wrote:
Sounds like a shorted pot or pedal. *Is that pot on the Gater board or
external to it? *(Hopefully external since Innovat cleared the board..)
Can you borrow another pedal to see if it controls the juice?

Yeah the pot is separate, I unhooked the pedal and check it . It is
OK. I put the dummy plug in the front so it would have panel
control.Pot is ok too.

OK, so if it's not in either control, and it's not in the gate board,
then it must be in your wiring. *Are you sure that there are no extra
controls or jumpers anywhere (y'know, like a thumb control ready to
reach out and bite your hand? snort) and that the jumpers installed
are absolutely in the correct position? *DAMHIKT

Hmm...Is this the same machine you had the same trouble with 2 years
ago?http://www.cnczone.com/forums/showthread.php?t=54698

--
"Just think of the tragedy of teaching children not to doubt."
* * * * * * * * * * * * * * * * * * * * *-- Clarence Darrow

Yes Larry,That is it. The same machine. I never got it fixed and
really don't want to scrap it out. I have a Lincoln Tig that I am
using at the moment.

I am starting to get some time available, so this would be something
to look into with fresh eyes.

Dan, I am not familiar with a saturable reactor or triac. I 'll
look it up on the internet. I have a PDF file of it if you would like
for me to send it to you.

I was tig welding one day, and it started running wide open. First
thing I thought was the pedal. After taking the pedal apart I found
nothing and went from there.

Thanks,
JAckal