The easiest way to check it is to start welding, full pedal and read the ammeter it will tell you the amps with those settings.
If the tungsten balls welding steel, the polarity could be wrong, or possibly the machine is in AC.
To Tig weld steel, the polarity needs to be DC, straight polarity.
Results 211 to 220 of 225
Thread: Dynasty ProcessesSet Up

06232014, 09:27 AM #211mike sr

06232014, 10:04 AM #212
If the terminology is the same as the 300DX, "Peak" is the percent of time at the set current, and "Background" is the percent of set current for the remaining time.
#1  60 amps 50% of the time
30 amps 50% of the time.
average current  45 amps
#2  34 amps 90% of the time
17 amps 10% of the time.
average current  32.3 ampsDynasty 300DX
MM350P
Hobart Handler 120
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06232014, 11:35 AM #213Junior Member
 Join Date
 Jun 2014
 Posts
 5
I appreciate the help. Although, I'm a bit confused. Regarding your average, where are you getting the 10%. In both "1" and "2" the background pertentage is the same. Based on the average you've calculated, are you saying that the background amps is determine by the difference in the "Peak" amp percentage time the "background" amp percentage which in the #2 scenario would be: 100%  90% = 10% x 34 amps x 50% = 1.9 background amps????
Then 34 amps x 90% = 30.6 peak amps
30.6 peak amps + 1.9 background amps = 32.5 average amps
is that how you're calculating back ground amps?

06232014, 03:00 PM #214
I think you're confused about the terms. "Peak" refers to the percentage of time at peak current. In #1 that is 60 amps for 50% of the pulse. "Background" is the percentage of peak amps. So in #1, it's 60 amps for 50% of the pulse, then 30 amps (50% of 60 amps) for the remaining 50% of the pulse.
In #2 it's 34 amps for 90% of the pulse, then 17 amps (50% of 34 amps) for the remaining 10% of the pulse.
If you were to change the pulse frequency to 1 PPS, the #2 would be 34 amps for 0.9 seconds followed by 17 amps for 0.1 seconds . . .
To calculate average current it's: (90% times 34 amps + 10% and 17 amps) divided by 100%.Dynasty 300DX
MM350P
Hobart Handler 120
Smith LW7, MW1, AW1
Smith AR/He Mixer

06232014, 06:45 PM #215Junior Member
 Join Date
 Jun 2014
 Posts
 5
Your right, I completely misunderstood the terms and their meaning. I understand now. I thought "Peak T" setting was establishing "Peak amps" which was a percentage of the Main amps determined by the "Peak T" setting. I realize now it's "the percentage of time at peak current". Thanks for your help and patients!!!

06232014, 09:30 PM #216

06242014, 06:57 AM #217Junior Member
 Join Date
 Jun 2014
 Posts
 5
That's funny. I seem to get to those numbers using this formula:
60(Main amps) x 50%(Peak T) + 60(Main amps) x 50%(background) x 50% (remaining time from peak t percentage) = 45 average amps
34(Main amps) x 90%(Peak T) + 34(Main amps) x 50%(background) x 10% (remaining time from peak t percentage) = 32.3 average amps
Using this formula below from "4sfed" didn't seem to work unless i was doing something wrong.
"To calculate average current it's: (90% times 34 amps + 10% and 17 amps) divided by 100%".
Last edited by Weldhelp; 06242014 at 07:28 AM.

06292014, 06:52 PM #218
mathematically, the syntax is correct (with the exception of the word "and", should have been "of", which mathematically just means "times"). If you change it all to decimal it becomes:
(0.90*34 + 0.10*17)/1 = 32.3 (because 100% in decimal = 1)
Notice how if you end up dividing be "1", it has no net effect. Anything divided by 1 results in the original quantity. The "percentage conversion" was already done without having to divide because to use percentages is to use decimal equivalents. What he [probably] meant to say was:
(90*34 + 10*17)/100= 32.3 (same thing he wrote, just use your mind's eye to "remove" the percentage symbols)
Both are equivalent by way of algebraic manipulation of common factors.HTP Invertig221 D.V. Watercooled
Eastwood MIG175 w/spoolgun
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06302014, 11:05 PM #219Junior Member
 Join Date
 Jun 2014
 Posts
 5
I appreciate your efforts but I really wasn't trying to "use my mind's eye" to figure out why his equation didn't work. LOL! Last I checked via when my son's 5th grade math (pre algebra), "and" means to add. Also, using "my minds eye" I learned and understood the concepts of physics w/trig and calculus while still in high school prior to college. Just because a person is new to welding doesn't mean that they're in need of a 3 grade math lesson being prescribe by Mr. Rogers  "...ok boys and girls now that you've had your milk and cookies, I need you to put your thinking caps on and use your mind's eye". It is absolutely clear to me that 4sfed is a very bright intelligent highly knowledge person in the area of welding and beyond. I'm more than certain he understood where his formula was incorrect, but his point was made clear; therefore, he obviously didn't feel the need to further explain something so simple. I only pointed it out because I didn't want to cause further confusion for anyone else that may have been interested in the info. I wasn't in need of anyone explaining to me what he meant. Nonetheless, do you have any "ProcessSet up" info to share regarding your Tig projects. I realize you have a HTP 221 and not a Dynasty 200, 280, 300, or 350 (oh wait....did the HTP sales guy tell you to "just use your mind's eye and think HTP and not MILLER"  JUST JOKING!!!! ). Nonetheless, I'm very much interested in knowing what pulse, ac, amp, and all other settings you're using to acquire specific arc characteristics necessary to complete specific weld types on specific materials. I'm trying to document as much of that as possible so that I have a good resource that I can use as a quick reference for starting points when I encounter something similar. Thanks Oscar Jr.! Again the HTP/"mind's eye" thing was just a joke and I hope you weren't offended!! Please share your info. Thanks!!
Last edited by Weldhelp; 07012014 at 05:38 AM.

07012014, 07:13 AM #220