Mig welding wire E71T-GS

Is this flux core wire strictly for flat horizontal welding, or am I just not good enough to weld vertically with it?

I can run a beautiful bead flat, but I can't run a nice one vertical-left-to-right, vertical-up, or vertical-down.

Can someone tell me which letter/number in the wire type tells me the welding position?

"E" designates an electrode.

"7" indicates a 70,000P.S.I. tensile strength.

The "1" does identify the product as all position.

The TGS label means you have tubular wire and the parameters will be available from the manufacturer rather than the AWS.
Steve

Running v-up with wire takes some skill and a lot of knowing the wire parameters as Steve said. Some need to have a slight upward angle, some need to be perpendicular (90 degrees to the joint surface) and some need a slight downward angle. Amerage and voltage settings also need to be set differently for some wires so they will function properly in different positions. I have a self shield wire that runs great on all my machines but the difference lies in the voltage and wire speed settings. Running flat, the wire lays a perfect bead at 26.5 volts and 410 inches per minute. At these settings, attempting a v-up leaves you with a big hole in the plate and a pile of melted metal at your feet. Dropping the voltage to 21.0 and the wire speed to 300"/min it'll put down the most perfect v-up you have ever seen.

Get the running info from the mfg for the different positions as well as the running angle at that setting. Try the settings, increase or decrease the wire speed and or voltage a little at a time if it does not run the way you want. If varying the settings does not help, you likely have a machine that cannot give the wire the output or control it needs to run properly.