I have recently acquired the above arc welder but can find absolutely no reference to it on the net (and very little about Elto). Can anyone give me any information about it please?
It's a typical "Buzz Box", ie AC stick welder. Left hand terminal is the "earth" (connect to workpiece) and the right hand terminal to the electrode holder. The knob sets the welding current (clockwise to reduce), the output current and suggested rod diameter is displayed on the scale on the top of the machine.
The LH lamp indicates that power is switched on, the RH when the unit cuts out due to high transformer temperature. If this happens, switch off and have a cup of tea while it cools down.
Thanks for the information. I've done a little MIG welding but no arc. From what little I've read I think I should start off (practice) with 3.25 mm electrodes. Does this make sense?
As bs said, 2.5mm would be better to start with. You will be able to use more rods before it cuts out.
It would be worthwhile just opening the case and blowing out any dust inside.
To me, the amp markings on it seem quite high for the suggested rod size. For example, 95A shown as 2.5mm would be low 3.2mm for me. I would run 2.5mm rods at 70-80A.
I typically suggest 3.2 rods for starting out. However, you have a 'buzz box' welder which overheat very quickly and you will get to burn more rods and gain more practice by using 2.5 rods which use less power and will allow the machine to work for longer without cutting out.
What is important is that you get good quality rods, avoid cheap ones as the quality can vary hugely and poor rods are very unpleasant for a practiced welder never mind a newbie and the extra cost is very little. Good rods are from brands such as Murex, Phoenix, GYS, Bohler, ESAB. Avoid Super6, Clarke etc and probably anything from Machine Mart.
Be aware that the amperage guide on these welders is very, very basic. Really it's just to tell you whether you're at the hot, middle or bottom end of the power range and you can't expect the numbers to bear much relation to the actual amps. Plus different brands of rods can vary greatly so it's necessary to adjust the power depending on how a particular rod runs. That's one place where good brands of rods are helpful as with cheap suppliers they sell whatever batch was cheapest at the time and different rods in the box can require different settings, and I have also seen differences in the rods themselves where the first half burns differently the second!
Your first place to begin with stick is to not think about joints right now and make a bead pad, if you haven't already done so look at the tutorials on this site.