"Snag"Â wrote in message news:spjncp$lbh$1@dont-email.me...
 Flux core 309L that is . Well , I can run a halfway decent bead but I don't like the way it looks ... I get good penetration if I vee the
joint , but if I wander off center I don't get good fusion on both sides
. I think it's going to come down to coating my joints with the Solar
flux , tacking with the MIG , then finishing the weld on the bench with
the TIG . My TIG welds ain't all that pretty , but they look a lot
better than my welds with this wire . Some of the welds will need to be
made on the truck , those will probably be done with the MIG . Though I haven't tried the OA rig for this yet ... I mean , if ya got it , try it ! ---------------------
https://medium.com/@3sketchjacob/types-of-mig-welding-techniques-overview-tips-39b4319afae6
I spent several class nights practicing vertical up on a non-critical project. It was quite a bit easier with the school's Miller than with my little 75A Century.
Either I forgot or no one ever told me there were different types of
flux core meant to use with and without shielding gas. Could you have
the wrong one?
No , this is not one of the dual-shield wires . The problem with the
bead is that it is tall and narrow . I'm at max 88 amps (Lincoln Weldpak
100) and varying the wire speed hasn't made much difference . The bead
looks nice , minimal oxidation on top , a little on the back side . I'm >actually more concerned with the lack of fusion than the bead profile .
It may be that I just don't have the amps for SS with this machine ...
On 12/18/2021 5:52 AM, Jim Wilkins wrote:
"Snag"Â wrote in message news:spjncp$lbh$1@dont-email.me...
  Flux core 309L that is . Well , I can run a halfway decent bead but I >> don't like the way it looks ... I get good penetration if I vee the
joint , but if I wander off center I don't get good fusion on both sides
. I think it's going to come down to coating my joints with the Solar
flux , tacking with the MIG , then finishing the weld on the bench with
the TIG . My TIG welds ain't all that pretty , but they look a lot
better than my welds with this wire . Some of the welds will need to be
made on the truck , those will probably be done with the MIG . Though I
haven't tried the OA rig for this yet ... I mean , if ya got it , try
it !
---------------------
https://medium.com/@3sketchjacob/types-of-mig-welding-techniques-overview-tips-39b4319afae6
I spent several class nights practicing vertical up on a non-critical
project. It was quite a bit easier with the school's Miller than with
my little 75A Century.
Either I forgot or no one ever told me there were different types of
flux core meant to use with and without shielding gas. Could you have
the wrong one?
 No , this is not one of the dual-shield wires . The problem with the
bead is that it is tall and narrow . I'm at max 88 amps (Lincoln Weldpak
100) and varying the wire speed hasn't made much difference . The bead
looks nice , minimal oxidation on top , a little on the back side . I'm actually more concerned with the lack of fusion than the bead profile .
It may be that I just don't have the amps for SS with this machine ...
On Sat, 18 Dec 2021 09:28:21 -0600Stainless shouldn't nees that much heat as it is a TERRIBLE heat
Snag <Snag_one@msn.com> wrote:
<snip>
No , this is not one of the dual-shield wires . The problem with the
bead is that it is tall and narrow . I'm at max 88 amps (Lincoln Weldpak >>100) and varying the wire speed hasn't made much difference . The bead >>looks nice , minimal oxidation on top , a little on the back side . I'm >>actually more concerned with the lack of fusion than the bead profile .
It may be that I just don't have the amps for SS with this machine ...
Maybe try preheating the area some with a torch first?
On 12/18/2021 8:28 AM, Snag wrote:
On 12/18/2021 5:52 AM, Jim Wilkins wrote:
"Snag"Â wrote in message news:spjncp$lbh$1@dont-email.me...
  Flux core 309L that is . Well , I can run a halfway decent bead but I >>> don't like the way it looks ... I get good penetration if I vee the
joint , but if I wander off center I don't get good fusion on both sides >>> . I think it's going to come down to coating my joints with the Solar
flux , tacking with the MIG , then finishing the weld on the bench with
the TIG . My TIG welds ain't all that pretty , but they look a lot
better than my welds with this wire . Some of the welds will need to be
made on the truck , those will probably be done with the MIG . Though I
haven't tried the OA rig for this yet ... I mean , if ya got it , try
it !
---------------------
https://medium.com/@3sketchjacob/types-of-mig-welding-techniques-overview-tips-39b4319afae6
I spent several class nights practicing vertical up on a non-critical
project. It was quite a bit easier with the school's Miller than with
my little 75A Century.
Either I forgot or no one ever told me there were different types of
flux core meant to use with and without shielding gas. Could you have
the wrong one?
  No , this is not one of the dual-shield wires . The problem with
the bead is that it is tall and narrow . I'm at max 88 amps (Lincoln
Weldpak 100) and varying the wire speed hasn't made much difference .
The bead looks nice , minimal oxidation on top , a little on the back
side . I'm actually more concerned with the lack of fusion than the
bead profile . It may be that I just don't have the amps for SS with
this machine ...
Well, just pop on over to the shop, and try it on the Miller 212. I'm
not using it today.
Is it possible your wire speed just might be a little fast.
On 12/18/2021 12:22 PM, Bob La Londe wrote:
On 12/18/2021 8:28 AM, Snag wrote:
On 12/18/2021 5:52 AM, Jim Wilkins wrote:
"Snag"Â wrote in message news:spjncp$lbh$1@dont-email.me...
  Flux core 309L that is . Well , I can run a halfway decent bead
but I
don't like the way it looks ... I get good penetration if I vee the
joint , but if I wander off center I don't get good fusion on both
sides
. I think it's going to come down to coating my joints with the Solar
flux , tacking with the MIG , then finishing the weld on the bench with >>>> the TIG . My TIG welds ain't all that pretty , but they look a lot
better than my welds with this wire . Some of the welds will need to be >>>> made on the truck , those will probably be done with the MIG . Though I >>>> haven't tried the OA rig for this yet ... I mean , if ya got it ,
try it !
---------------------
https://medium.com/@3sketchjacob/types-of-mig-welding-techniques-overview-tips-39b4319afae6
I spent several class nights practicing vertical up on a
non-critical project. It was quite a bit easier with the school's
Miller than with my little 75A Century.
Either I forgot or no one ever told me there were different types of
flux core meant to use with and without shielding gas. Could you
have the wrong one?
  No , this is not one of the dual-shield wires . The problem with
the bead is that it is tall and narrow . I'm at max 88 amps (Lincoln
Weldpak 100) and varying the wire speed hasn't made much difference .
The bead looks nice , minimal oxidation on top , a little on the back
side . I'm actually more concerned with the lack of fusion than the
bead profile . It may be that I just don't have the amps for SS with
this machine ...
Well, just pop on over to the shop, and try it on the Miller 212. I'm
not using it today.
Is it possible your wire speed just might be a little fast.
 No , if I slow it down it burns back . I think it really needs just a
few more amps , which I ain't got . Interesting though , the bead
flattens a little after the first half inch or so . It's hard for me to
run a bead much longer than about an inch and a half on this round stuff
so they all look like crap ... at least my TIG beads look uniformly
crappy !
"Bob La Londe"Â wrote in message news:sptlvi$sop$1@gioia.aioe.org...
...Fortunately the duty cycle of the cheap stick welder I was using made me stop halfway around anyway. LOL.
-------------------
After buying a Stick/TIG Lincoln I found a better use for my 50A buzz
box arc welder as the transformer in a homebrew 12-24V 30A battery
charger. It needed a Variac to tame it. If necessary I can still
reconfigure it as a 120V stick welder.
On 12/22/2021 5:34 AM, Jim Wilkins wrote:
"Bob La Londe" wrote in message news:sptlvi$sop$1@gioia.aioe.org...
...Fortunately the duty cycle of the cheap stick welder I was using made me >> stop halfway around anyway. LOL.
-------------------
After buying a Stick/TIG Lincoln I found a better use for my 50A buzz
box arc welder as the transformer in a homebrew 12-24V 30A battery
charger. It needed a Variac to tame it. If necessary I can still
reconfigure it as a 120V stick welder.
That is fascinating. I do have a variac on the shelf that was plannedFor battery charging unfiltered is every bit as good as filtered -
for a sheet plastic bending tool, nut since I discovered I could bend
poly carbonate on the brake I haven't really played with the original
idea much. My buzzbox is AC only so to use it as a charger or power
supply I'd need to add a huge bridge rectifier and some serious power
caps. Not that I couldn't. That's essentially what I did for the servo
power supply on the Hurco mill. Well the transformer wasn't quite that
big, but...
On Thu, 23 Dec 2021 07:44:09 -0700, Bob La Londe <none@none.com99>
wrote:
On 12/22/2021 5:34 AM, Jim Wilkins wrote:For battery charging unfiltered is every bit as good as filtered -
"Bob La Londe"Â wrote in message news:sptlvi$sop$1@gioia.aioe.org...
...Fortunately the duty cycle of the cheap stick welder I was using made me >>> stop halfway around anyway. LOL.
-------------------
After buying a Stick/TIG Lincoln I found a better use for my 50A buzz
box arc welder as the transformer in a homebrew 12-24V 30A battery
charger. It needed a Variac to tame it. If necessary I can still
reconfigure it as a 120V stick welder.
That is fascinating. I do have a variac on the shelf that was planned
for a sheet plastic bending tool, nut since I discovered I could bend
poly carbonate on the brake I haven't really played with the original
idea much. My buzzbox is AC only so to use it as a charger or power
supply I'd need to add a huge bridge rectifier and some serious power
caps. Not that I couldn't. That's essentially what I did for the servo
power supply on the Hurco mill. Well the transformer wasn't quite that
big, but...
and many "experts" would say better as the "pilsed charge" helps break
up suphate deposits, agitates the electrolyte, and dislodges bubbles.
Using it as a charger at up to 50 amps doesn't erven take a HUGE
rectifier. A full wave bridge that handles 50 amps is only about 1 1/2
inches square and 3/8" thick. AMd only costs a few bucks.
"Bob La Londe" wrote in message news:sptlvi$sop$1@gioia.aioe.org...
...Fortunately the duty cycle of the cheap stick welder I was using made
me
stop halfway around anyway. LOL.
-------------------
After buying a Stick/TIG Lincoln I found a better use for my 50A buzz box
arc welder as the transformer in a homebrew 12-24V 30A battery charger. It needed a Variac to tame it. If necessary I can still reconfigure it as a
120V stick welder.
The limit I couldn't work around was heating of the primary winding....
Although it's rated for 50A at 25 arc volts the duty cycle is 20%. I
found that an output of 30A for a few minutes followed by ~22A for half
an hour would heat it to 70C at the outer windings, measured by jamming
in a fine thermocouple after finding the hottest spot with an IR
thermometer.
The limit I couldn't work around was heating of the primary winding....
Although it's rated for 50A at 25 arc volts the duty cycle is 20%. I found that an output of 30A for a few minutes followed by ~22A for half an hour would heat it to 70C at the outer windings, measured by jamming in a fine thermocouple after finding the hottest spot with an IR thermometer.
I have the instruments to measure tenths of milliOhms which would still
give me only the average temperature. The primary is 198(?) turns of 10
AWG at 1 milliOhm per foot, rated for 17A, the secondary is 6 AWG and
runs cooler. The thermocouple let me graph the temperature rise on a
laptop to observe its approach to a steady state, and check by briefly raising the current and then seeing if the temperature peaked and
decreased. The temperature rise rating is 115C but I wanted some margin
for running safely enclosed instead of open, accessible and hazardous.
The fans on my APC inverter and T60 freezer are loud enough that I can't
hear whether anything else is running or not, like a fridge or the fan
in the power supply.
The datalog spreadsheet shows that at 25V, 25A out the transformer
reached 73.4C at 31 minutes, rising 0.5C per minute, and cooled slightly afterwards at 20V, 20A, open and without the fan.
It should be fine at 20A continuously, 30A for ~10 minutes, and all it
can deliver for brief experiments. The 30A output breaker will pass 70A
for about 5 seconds and the ammeter reads to 100A.
| Sysop: | Keyop |
|---|---|
| Location: | Huddersfield, West Yorkshire, UK |
| Users: | 296 |
| Nodes: | 16 (2 / 14) |
| Uptime: | 73:30:26 |
| Calls: | 6,657 |
| Calls today: | 3 |
| Files: | 12,203 |
| Messages: | 5,332,384 |
| Posted today: | 1 |