Snag <Snag_one@msn.com> writes:

On 3/14/2025 5:46 PM, Richard Smith wrote:

... ...
impression of what welding is like - no more than that.
Regards,

I read most of your posts , even the stuff I don't understand - yet
. Your technical knowledge is way beyond what I "need" to know , but
it gives me insights into why sometimes things I do get unexpected
results . Keep on posting !

:-) {thumbs-up}

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Hello everyone.

Welding newsgroup seems defunct. This may or may not be excessively abstruse .

Continuing welding, working in a FabCo. More than 4 months back at it
now.

"My" welding machine, a Miller MigMatic 320i, is a Constant Voltage
GMAW / MIG welding machine. It seems to be internally an inverter,
but is Constant Voltage output. It is an "economy" industrial machine.

Everyone else has "pulse" machines, which are minimum 5X the cost.

"My" situation is made more difficult because almost all our
thicknesses are in the 5mm to 8mm range - right where for Constant
Voltage you will be in the "globular" transition domain between
dip-transfer (lower thicknesses) to spray-transfer (higher
thicknesses) fundamental physical domains.
So I am forcing "I intend spray and finagle it to be so" or "I intend
dip and make it so".
Crazy big adjustments of both wire-feed-speed and Voltage between
different welds on the same job.

For the "pulse" machines this is a non-point - they are in pulse all
the way from low powers up to high powers, with no transition range.
Nice "just right" fluid weld pool etc. through the range.

I suspect the pulse machines with their "proprietary special
high-productivity" pulse modes sense how long the arc is and where the
weldpool surface is - that they are "fly-by-wire".

I met / found this almost 15 years ago http://weldsmith.co.uk/tech/welding/datalog/GMAW_RapidArc_170612.html
"Waveform analysis for MIG / GMAW "Lincoln RapidArc" on steel"
As some pillock who had stumbled on this while doing a bit of
research, Lincoln told me what this does for their industrial
customers - and going back with an armful of offcuts I found that is
exactly so - it will "run" absurdly fast while keeping control of the
weld-pool and giving the sought weld bead shape.
But yes part of that pulse cycle I logged and graphed is "feeling"
where the weld pool (surface) is. "fly-by-wire" ...


Anyway - to the question...

The "pulse" machines seem to have such a broad "good zone" you simply
set the thickness, irrespective of joint geometry, etc., etc., etc -
and it welds perfectly.

With "my" CV machine, I have a great big archive of welding conditions
for each
{thickness; joint geometry; high-penetration or high-deposition; etc.,
etc.}
Then unique jobs with special conditions.
10's into maybe hundreds of them.

So the CV machine has a very very narrow "good-zone" / "sweet-spot";
while the "pulse" machine with seemingly its "fly-by-wire" has such a
wide "good-zone" that you have this "one-size-fits-all" dial-in the
thickness.

Anyone else know of this?

Rich Smith

--- SoupGate-Win32 v1.05
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On 3/14/2025 4:33 AM, Richard Smith wrote:

Hello everyone.

Welding newsgroup seems defunct. This may or may not be excessively abstruse .

Continuing welding, working in a FabCo. More than 4 months back at it
now.

The Miller Welds Forum still had some activity last time I visited.

That being said, welding is part of metalworking so your posts should
always be welcome here. I sometimes learn something from your posts,
and sometimes am forced to go look something up so I can pretend to
understand it. I certainly have no issue with you posting here.




--
Bob La Londe
CNC Molds N Stuff

--
This email has been checked for viruses by AVG antivirus software.
www.avg.com

--- SoupGate-Win32 v1.05
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Bob La Londe <none@none.com99> writes:

On 3/14/2025 4:33 AM, Richard Smith wrote:

Hello everyone.
...
now.

The Miller Welds Forum still had some activity last time I visited.

That being said, welding is part of metalworking so your posts should
always be welcome here. I sometimes learn something from your posts,
and sometimes am forced to go look something up so I can pretend to understand it. I certainly have no issue with you posting here.
...
CNC Molds N Stuff

Let's see if any comments come along.
I am grateful for all help received, and am philosophical that maybe this
post will be read and if taken as plausible will shed some implicit
impression of what welding is like - no more than that.
Regards,

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On 3/14/2025 5:46 PM, Richard Smith wrote:

Bob La Londe <none@none.com99> writes:

On 3/14/2025 4:33 AM, Richard Smith wrote:

Hello everyone.
...
now.

The Miller Welds Forum still had some activity last time I visited.

That being said, welding is part of metalworking so your posts should
always be welcome here. I sometimes learn something from your posts,
and sometimes am forced to go look something up so I can pretend to
understand it. I certainly have no issue with you posting here.
...
CNC Molds N Stuff

Let's see if any comments come along.
I am grateful for all help received, and am philosophical that maybe this post will be read and if taken as plausible will shed some implicit impression of what welding is like - no more than that.
Regards,

I read most of your posts , even the stuff I don't understand - yet .
Your technical knowledge is way beyond what I "need" to know , but it
gives me insights into why sometimes things I do get unexpected results
. Keep on posting !
--
Snag
We live in a time where intelligent people
are being silenced so that
stupid people won't be offended.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)