What is a typical open circuit no load?
What is a typical open circuit (no load) voltage for an arc welding machine? 60-80 volts. What are the advantages of using a constant current arc welding machine?
How do you test for open circuit?
Maintain the first test probe at the hot wire terminal of the circuit. Remove the second probe from the neutral terminal then place it on the ground terminal for the circuit. Once more the multimeter will read “OL” or infinity if the circuit is open or zero if the circuit is functioning.
Why open circuit test is performed on high voltage side?
Its main reason is that open circuit test is conducted to find the core/iron loss of a transformer(neglecting copper loss). If you conduct this test on the high voltage side you are to supply a high voltage and hence it draws more power.
What controls the size of the arc?
The measurement of total number of electrons flowing, in the same way that gallons is a measurement of the amount of water flowing. This controls the size of the arc. The electrons change direction every 1/120 of a second so that the electrode and the work alternate from positive to negative.
What is the effect of long arc?
Excessively long arcs (too much voltage) produce spatter, low deposition rates, undercuts and often leaves porosity. Too long of an arc length will create excess spatter in the weld joint. Reducing the arc length will decrease the voltage, and this reduces the heat in the weld.
What is the correct arc length?
Length of arc: The correct arc length varies with each electrode and application. As a good starting point, arc length should not exceed the diameter of the metal portion (core) of the electrode. For example, an 1/8-inch 6010 electrode is held about 1/8 inch off the base material.
What is the length of arc generally?
Explanation: The distance from the center of the arc to the tip of the electrode, right till the bottom of the crater is defined to be the arc length. The arc length is considered to be one of the most essential variable in welding process. 3.
How hot is an arc welder?
10,000 degrees Fahrenheit
How many feet can you weld in an hour?
F. Gas Flow Rate (Cubic Feet/Hour) For GMAW with solid wires use a shielding gas flow rate of 25 to 30 cubic feet per hour. For small diameter flux cored electrodes (1/16” or 1.6 mm diameter and under) use 35 cubic feet per hour. For large diameter flux cored electrodes (5/64 and over) use 40-45 cubic feet per hour.