Figure 1 contains graphs of the typical output curves of CC and CV power sources. A CC power source will maintain current at a relatively constant level, regardless of fairly large changes in voltage, while a CV power source will maintain voltage at a relatively constant level, regardless of fairly large changes in current. The power source is monitoring the arc and making millisecond changes in order to maintain a stable arc condition. Note that a welding arc is dynamic, in which current (A) and voltage (V) are changing constantly. Multi-process power sources are those that contain additional circuitry and components which allows them to produce both CC and CV output depending on the selected mode. These include power sources that produce a constant current (CC) output and power sources that produce a constant voltage (CV) output. From a design and arc control standpoint, there are two fundamentally different types of welding power sources. These are very good questions and ones I am sure that have been asked by many welders. Does this mean they can be used with any welding machine? Why is it that some can only be used for stick welding and some only for wire welding, but then other machines can be used for both? I have heard the terms CC and CV, but what do these mean and why are they important? Finally, our company has some portable wire feeders with a “CV / CC” switch inside of them. Why is this? At work we have several different types of welding machines. I want to use it for some stick welding, but have been told I cannot.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |