Looks like DC only Mozzer, but I wouldn't be too disappointed, Migatronics are good quality machines, and with the pulse features that will be a useful bit of kit, don't forget that you can plug in an electrode holder and use it for MA welding too.
Well in brief, pulsing turns the arc on and off very quickly to improve control when welding thin materials, yet always maintaining a background current, the frequency can be adjusted to suit the job, and on my Stel can be adjusted from 4 to 300 hertz, background current is set as a percentage of peak current, so for example if you set your welder at 60 amps, with a 50% background you will get a burst at 60 amps, then it drops back to 30 amps, to allow the puddle to freeze, and then back to 60 amps, all this happens at whatever frequency you have selected, so 60 hz = 60 times per second,you can also select pulse width, You might want to read through this thread for a bit more information, although as you are a beginner, I would recommend that initially you learn to use the machine without the pulse mode, It will only serve to confuse you until you have grasped the basics.
TIG Paul, the pulse on this is in seconds not hertz. Your thinking of the newer inverters with variable frequency. This is pulse period from 0 to 10 seconds and an on time of 0 to 100% of the period.
cheers paul ......... im struggling to find a manual for my welder and dont know what the dials etc do and should be set too,,,,, can nyone give me some pointers..........
You shouldn't really need a manual for that machine as it's fairly generic.
However, here's a quick go at setting it up, starting at the top left knob.
That's the initial starting current possibly (it's blurred) as a percentage of the welding current set with the big knob and shown on the readout. It's not so important for your purposes, but you want it to be enough to easily get the arc going. 50% should be fine.
Next you have the upslope time - how long the machine takes to build up to full welding current (as set on the big knob). Again, not too important. 0.5 to 1 second would be ok.
Downslope - important to avoid cratering especially in ally on ac/dc tig, so not a big deal for you! However, handy anyway. 1 or two seconds depending on material and size etc.
Note, none of the above applies if you are using a pedal, as it will bypass those controls and you will adjust wi't' foot.
Postflow - keeps argon flowing over the tungsten (and the work, good for stainless) to stop oxidisation. Rule of thumb is one second post flow for every 10 amps set. Although you can get away with less if you want to be stingy on the gas.
Bottom row - first switch sets type of welding - down for stick, up for tig, can't see what the middle is - some tig setting.
second switch sets pulse on or off or tig spot. Don't bother with pulse for now. You want to know more about how to use pulse, go Google. It's handy for controlling heat into thin stuff, but really, don't worry about it.
The knobs set pulse width and percentage of minor pulse current.
The 4T mode is very often wrongly described as 'Trigger Latching', ie Press/Release = ON, Press/Release = OFF. It is actually used to control the slope up and down between initial, main and final welding currents.
1. Press and hold the button to initiate the arc at the start current, this is usually set as a percentage of the main welding current. The arc will remain at the start current as long as the button his held on.
2. Release the button, the current will rise until it reaches the main welding current, the rate at which it rises is set by the slope up control timer.
3. Press the button again, the current will fall until it reaches the final welding or crater current, the rate at which it falls is set by the slope down control timer. The arc will remain at the final current as long as the button is held on.
4. Release the button, the arc is extinguished and the gas post flow time starts, gas continues to flow for the number of seconds set on the post flow timer.