The HV spot welder, pictured above, is in the HV room in the SDC.
Steps:
1.
Plug it in (and make sure to unplug it once finished with the spot welder.
2. If the white tube is not connected to the compressed air supply, then you’ll need to connect it:
3. Open the compressed air supply:
4. Pull down on the knob below the pressure meter (there will be an orange band visible below the meter once you have done this). Turn it until the needle points to ~50psi, as shown in the picture below, then hit the knob back upwards to fix the setting in place (the orange band should now be hidden).
5. Focus on the two pill-shaped holes on the front of the spot welder. Make sure the two screws are at the height shown in the picture. They should be at the third white tick from the bottom. Don’t adjust the orange ticks yet.
If the two screws aren’t at the third white tick from the bottom, then use a wrench/pliers to loosen the two silver nuts on the top, and screw/unscrew until the screws are at the third tick. Then re-tighten the nut.
6.
4. Go back to the spot welder. While making sure that your foot isn’t on the pedal, turn it on by pressing the button on the LEFT side of the machine. It will take 1-2 minutes to load up to the screen shown below: