Currently welding with fluxcore wire in my hobart 140, do I have to buy another mig gun to weld solid wire and using argon/co2 gas mixture?

switch from tig welding to mig by switching your current from AC to DC for mig. change from your tig gun to your mig gun. turn water flow off. proper ground and weld away.

Hi,
Let's troubleshoot this one:
1) Make sure you have the right polarity for the wire you are using: Innershield wire (no gas) ground clamp must be on the + side. Solid Wire (gas use) ground clamp to negative side.
2) If gas is used: Mild steel welding requires Argon/CO2 mix 75/25 or 90/10. Using pure CO2 you will create a lot of sparks and a lot of fumes. Stainless Steel welding requires a Trimix gas of Argon/Helium and CO2. Aluminum Welding requires pure argon. Any use of gas requires a steady gas flow of no more than 25 SCFH. If you use more than that or less you will find porosity on the welding.
3) Your work piece must be cleaned before welding (no grease, dirt or paint).
4) Check your machine welding chart for wire speed and voltage.
If you still experience problems with welding quality, check you input power voltage, make sure it doesn't fluctuate.
Goooooood Luck.

Hi:

This could be a problem of gthe gas you are using. Make sure to use mix 75/25 argon/CO2 for mild steel welding, argon 100% for aluminum and trimix helium/argon/CO2 for stainless steel.
Also check your heat (voltage) 16-22 is enough for weld of most steels less than 1/2 inch.

you have to use the gas 75-25 for steel and cast iron 100% argon for welding alumanuan

Newer welders as hobart and miller are set up from factory to use innershield wire therefore polarity is set up as inverse. Check inside your machine and check that ground cable is on negative side. Your gas must be mix argon/CO2 or pure CO2 (not recommended).
Other potential problem is wire not being a mild steel one. Check you have gas flow out of your nozzle.
That's all I can think of.

Your wire speed is too low and your voltage is too high, that is the reason. Try a very high wire speed (400 ipm) and a 19 volts to begin. What is the amperage of your machine????
Are you using straight CO2 or a 75/25 argon mix, or just fluxcore wire??

If you are using solid wire, you need to use a shielding gas like Carbon Dioxide or Argon. Otherwise you will not get *********** and the wire will leave random blobs.

If you are using flux cored wire, you do not need the shield gas as the core is producing the gas shield.

This should remedy it.

your hobart machine it's not suit up for standard aluminum welding, the lenght of the gun it's too long therefore the wire will nest at the drive rolls. You need to buy a spool gun. Or change gun liner for a teflon one (instead of metal one), then change the drive roll for knurled ones and finally oversize your tip if you can. No need to do ALL this if you buy a spool gun.

Can use argon/co2 mix or CO2 the wire usually has the gas named on the lable

Check your input line voltage. 115 volt Mig welders / plasma cutters need stable voltage / current. Test to see if the voltage drops to below 100 volts when welding. If so, find a more stable power supply.