Dialing in the Imig 205

[performance]

TX,
Setting pulse on a MIG is not easy, unless you are well experienced welder, and understand what is going on from a technical standpoint. It is a very advanced feature. There's a lot of theory involved, and giving a starting point for setting pulse correctly is not easy through this medium. For every Volt/Amp value you set, there is a different pulse setting that is optimized. You have to be able to see, hear and feel what you are doing. Pulse is really pulsed spray. You need 90/10 Ar/Co2 (most common gas available although 85/15 might work) to even begin to make this work. (FOR Steel) Frequency sets the number of times per second the unit pulses. The unit pulses voltage at two values...high and low. The Time on expresses the amount of time it stays in the high side vs the low voltage side of the pulse. The whole idea is to lower the heat input by averaging the input of heat. The unit will spray but the pulse will drop out of spray long enough into globular transfer for the metal to cool, but not really long enough to transfer any metal if it is properly set.

[Txcheddar]

Ok. Lets say you are using your starting point formula and welding .125 as you listed previously. In your expierence what would you set your pulse settings at to start. What would you expect to see, hear or feel. And what would you change first if it did not seem correct?

[performance]

TX,
Are you aware what spray arc is and what pulse spray is? Please go on the web and read in detail about it first if you aren't. It's complicated theory and too detailed for me to spend hours on a primer here. There are volumes written about it. Not something easily covered in this forum. And as I said, for each Volt/Amp setting, there is a different ideal pulse setting. MIG Pulse is not for beginners to spray arc welding (if that is the case), especially not when it comes to manually setting up one. Digital MIGs that have pulse are preprogrammed with optimum settings because it isn't easy to do...but When it's right you'll know. It doesn't sound the same as regular MIG, more like an angry bee...hive. Here's a good place to start: http://www.praxair.com/praxair.nsf/0/c56dbfa8e80d0dbd85256ab300140b28/$FILE/P-8126.pdf

[Txcheddar]

[QUOTE=performance;41264]TX,
Are you aware what spray arc is and what pulse spray is? Please go on the web and read in detail about it first if you aren't. It's complicated theory and too detailed for me to spend hours on a primer here. There are volumes written about it. Not something easily covered in this forum. And as I said, for each Volt/Amp setting, there is a different ideal pulse setting. MIG Pulse is not for beginners to spray arc welding (if that is the case), especially not when it comes to manually setting up one. Digital MIGs that have pulse are preprogrammed with optimum settings because it isn't easy to do...but When it's right you'll know. It doesn't sound the same as regular MIG, more like an angry bee...hive. Here's a good place to start: http://www.praxair.com/praxair.nsf/0/c56dbfa8e80d0dbd85256ab300140b28/$FILE/

I don't know if there is an appropriate response I could give to get an answer. You have two machines. Can't you set the machine to your example and give a setting for pulse? And not give convoluted answer.

[performance]

No. These machines are analog and each one will be a little different and the threshold for pulse spray is going to be different. You will have to set by feel and sight not by exact setting. It will depend upon gas flow rate, EXACT gas mix type, (The blend will make a huge difference even with a few % difference or the addition/deletion of one of the mix components, wire diameter, wire type, metal thickness, position and to some extent, technique(push vs. pull) etc. Those features are typically programmed into the settings on digital machines, and the pulse is 100% synergic. That's why a lot of companies sell only synergic, preprogrammed type machines, because so many variables are involved and it takes skill, knowledge and experience to get pulse mig right. There is no yes/no answer...especially on one that is set through analog control...and has a % margin of error. Add in the inductance/arc force control and it adds in a whole 'nother dimension of adjustment.


You haven't given the gas mix type you are using, the wire diameter or anything...all important variables, but even with those, there's no exact answer. If I could make an analogy here, pulse whether TIG or MIG, is like an adjustable wrench in a tool box, and asking how much turning you should give it to make "a" bolt or nut tight....it all depends...

The settings given above were estimations in themselves, and the thread is pertaining to an i-MIG 205...without pulse.

[everlastsupport]

Here are basic start setting for general MIG for the 250P and 205P (old 205P).

From these settings you can use the Pulse Width, Base and Freq to experiment (based on speed and thickness).

Mark is not wrong on the pulse, and as well most people will have totally different settings so you have to dial it in for you. Start off here and change width, freq, volts to you taste.

Also, as he stated, the gas does a difference as well. This is using C25 (25/75 Co2/Argon), not so good for spray. Might not even do it on the 205, but it will be close.

These are knob settings, not the display readout. Hope this helps.

IMIG-250P

Pulse volts 23, Pulse Freq 110 (top dead center higher for narrower bead), Pulse Time On 70 (back up and down for more heat), AMPS/speed 160-320 (depends on you), Arc force 8

IMIG-205P

Base volts 8, Arc Force 6, Current 5, Volts (depends on metal thickness and your speed), Pulse width 8, Frequency 5 (110-120) see above.

Also for the 205P, see here.. http://www.everlastgenerators.com/fo...28by-Geezer%29

[225]

What about for the 200? Starting with 1/8" square tubing?