Ferry Press Releases. 1  Monday, April 10, 2017: Hatteras-Ocracoke Spring Ferry Schedules Begin Tuesday. 2  Tuesday, April 04, 2017: M/V Sea Level Runs Soft Aground Near Ocracoke. 3  Thursday, January 12, 2017: 2017 Hatteras Vendor Priority Passes Still Available.
Both electrodes focus current at the same point to make a spot weld. Draw a high current for spot welding, according to the thickness and type of medal. Spot welding may require up to 90,000 amperes for thick pieces of aluminum. Maintain the current for a specific period of time.Weld times in spot welding can vary from 0.01 seconds to 0.63 seconds, depending on the metal thickness. Spot welding may be used on extremely thin pieces of metal, up to 1.25-inch metal plate.oth electrodes focus current at the same point to make a spot weld. Draw a high current for spot welding, according to the thickness and type of medal. Spot welding may require up to 90,000 amperes for thick pieces of aluminum. Maintain the current for a specific period of time.
We used about four feet of 4AWG wire to build the spot welder in the photo. Other materials included scrap 2Ã6, 2Ã2, two copper screw type lugs, two copper welding cable lugs, two MIG welder tips, two 4â³ x 3/4â³ zinc plated corner braces, drywall screws, and three washers. Pictured above is a working MOT.n this how-to we cover the basics of a spot welder, and then show you how to build one from a microwave oven transformer. A spot welderâs electrodes serve at least three functions. They transfer electrical energy to the material while also holding it together; this also controls resistance.