Search found 13 matches

by EngineerIsWelding
Tue Mar 03, 2020 2:00 am
Forum: Tig Welding - Tig Welding Aluminum - Tig Welding Techniques - Aluminum Tig Welding
Topic: Stainless steel color and quality
Replies: 13
Views: 1542

Re: Stainless steel color and quality

Simclardy, I have been thinking in terms of energy too, so what you said makes sense. Total and average energy should matter most, though I guess you also have to think about how fast the heat dissipates into the weldment and the energy used to melt the filler. Maybe too much too fast blows a hole? ...
by EngineerIsWelding
Mon Mar 02, 2020 4:15 pm
Forum: Tig Welding - Tig Welding Aluminum - Tig Welding Techniques - Aluminum Tig Welding
Topic: Stainless steel color and quality
Replies: 13
Views: 1542

Re: Stainless steel color and quality

For 18# staino, to achieve peno and good colour you need pulse. What power source are you using? Yes that makes sense. I have the dynasty 210dx and the pulse works great. Can you guys elaborate on how you're using pulse in this case? Most stainless I'm welding is just a little thicker than what's b...
by EngineerIsWelding
Thu Feb 27, 2020 2:57 am
Forum: Product Reviews
Topic: Welding Helmet Reccomendation
Replies: 46
Views: 13504

Re: Welding Helmet Reccomendation

I have been happy with the Harbor Freight Vulcan Arcsafe helmet. $119 on sale, more typically $129 on sale and about $149 regular price. I'd read generally good reviews and HF is local so I can take it back if dissatisfied. It's light, has good headgar, big viewing area, and good optical quality. 4 ...
by EngineerIsWelding
Mon Feb 24, 2020 2:02 pm
Forum: Tig Welding - Tig Welding Aluminum - Tig Welding Techniques - Aluminum Tig Welding
Topic: Extreme porosity in second pass
Replies: 9
Views: 2334

Re: Extreme porosity in second pass

If your gas coverage is marginal, the different contour of the weldment(s) in the 2nd pass might make the difference by changing how the argon shield drains away. Just for fun one time, after I messed up and had porosity on a small weld, I tried to heal it. Going over it with the same filler rod and...
by EngineerIsWelding
Mon Feb 24, 2020 1:50 pm
Forum: Tig Welding - Tig Welding Aluminum - Tig Welding Techniques - Aluminum Tig Welding
Topic: Argon High Pressure
Replies: 19
Views: 4105

Re: Argon High Pressure

Aren't you doing yourself out of money by not using everything up? Yes, if your supplier sets no minimum return pressure, you're not using a little of the gas you paid for and could have used. My bottle came with 2200 PSI and I returned it with 100 PSI, so I "wasted" less than 1/20 of the...
by EngineerIsWelding
Mon Feb 24, 2020 4:12 am
Forum: Tig Welding - Tig Welding Aluminum - Tig Welding Techniques - Aluminum Tig Welding
Topic: Sheet metal filler rod
Replies: 10
Views: 1741

Re: Sheet metal filler rod

The inverters (I guess all the DV machines are inverters) are a kind of switched-mode power supply, and I agree that the differences due to 120 vs. 240 line voltage *should* only be max amps (and therefore amp knob scaling) and duty cycle. I have a DV machine and have used it on both mains voltages ...
by EngineerIsWelding
Tue Feb 18, 2020 5:10 pm
Forum: Tig Welding - Tig Welding Aluminum - Tig Welding Techniques - Aluminum Tig Welding
Topic: Argon High Pressure
Replies: 19
Views: 4105

Best to just call your gas vendor?

Different gas suppliers have different policies, and it might even have to do with the local environment. Maybe if it's humid where you live, there's a greater risk of moisture contamination in bottles that are drawn all the way down to 0 PSI. When my bottle got down to 200 PSI I called them and ask...
by EngineerIsWelding
Sun Feb 09, 2020 12:53 am
Forum: Tig Welding - Tig Welding Aluminum - Tig Welding Techniques - Aluminum Tig Welding
Topic: Pulse Settings?
Replies: 9
Views: 2505

Re: Pulse Settings?

Oscar's links will take you into some of the theory and explanations of pulsing effects. Jody discusses pulsing in quite a few videos, and here's one that covers a number of examples. He shows the effect on travel speed, penetration, edge build-up, etc.
https://www.youtube.com/watch?v=V5OhIc7R6r8
by EngineerIsWelding
Sun Feb 09, 2020 12:53 am
Forum: Tig Welding - Tig Welding Aluminum - Tig Welding Techniques - Aluminum Tig Welding
Topic: Pulse Settings?
Replies: 9
Views: 2505

Re: Pulse Settings?

Oscar's links will take you into some of the theory and explanations of pulsing effects. Jody discusses pulsing in quite a few videos, and here's one that covers a number of examples. He shows the effect on travel speed, penetration, edge build-up, etc.
https://www.youtube.com/watch?v=V5OhIc7R6r8
by EngineerIsWelding
Fri Feb 07, 2020 2:45 pm
Forum: Tig Welding - Tig Welding Aluminum - Tig Welding Techniques - Aluminum Tig Welding
Topic: Pulse Settings?
Replies: 9
Views: 2505

Re: Pulse Settings?

I'm a pretty new welder, but since I have done some experimenting with pulsing on carbon and stainless steel and aluminum, and because more experienced welders haven't chimed in, I'll put in my two cents. I've worked mostly with thin material, 1/8" (11 ga) to a little less than 1/16" (18 g...
by EngineerIsWelding
Wed Jan 08, 2020 3:55 am
Forum: Tig Welding - Tig Welding Aluminum - Tig Welding Techniques - Aluminum Tig Welding
Topic: Trying to decide on a Tig rig but I’m in a unique situation.
Replies: 63
Views: 9799

Re: Trying to decide on a Tig rig but I’m in a unique situat

Lots of good information and perspective here. Maybe I can contribute a little with some voltage drop and resistance numbers for extension cords. The Everlast 256SI draws a max inrush of 40 amps and a max effective of 32 amps, so I'll use those figures to calculate voltage drop. Impedance numbers ar...
by EngineerIsWelding
Wed Dec 11, 2019 12:45 am
Forum: Tig Welding - Tig Welding Aluminum - Tig Welding Techniques - Aluminum Tig Welding
Topic: New to TIG - Any amperage and the aluminum is destroyed
Replies: 50
Views: 6112

Re: New to TIG - Any amperage and the aluminum is destroyed

I'll defer to others far more expert than me, and I think there may be multiple problems including the shielding gas, but you might also check your polarity. EP on steel and too much cleaning action (wrong AC balance) on aluminum can be ugly.
by EngineerIsWelding
Thu Nov 14, 2019 3:13 am
Forum: Tig Welding - Tig Welding Aluminum - Tig Welding Techniques - Aluminum Tig Welding
Topic: Square wave 200 issue
Replies: 1
Views: 1227

Re: Square wave 200 issue

I just joined the forum and saw this, so this reply is perhaps too late to be useful. Maybe it will help someone else with a similar issue. If you've solved the problem in the meantime, you might post what you found/learned, to help the rest of us. I recently saw a YouTube video where a guy had a si...