We placed the frame in a vise to use it while holding the parts to be welded. The controls include a thumb switch to close the jaws and a trigger switch or foot switch to fire the spot weld.
The system appears to have been customized by Falstrom Welding Products. The welder is guaranteed to be working since it was being used when the lab shut down.
Local pick-up in Sugar Land Texas is free. The item "15 KVA ARO Portable Spot Welding Guns 220V Rotates on Support Arm Works Great" is in sale since Saturday, August 17, 2019. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Welding & Soldering Equipment\Welding Equipment & Accessories\Welders, Cutters & Torches\TIG Welders". The seller is "alloy1957" and is located in Sugar Land, Texas. This item can't be shipped, the buyer must pick up the item.