Apparatus for obtaining feedback signals for controlling a parameter of an arc welding machine
US4169224A · kind A · utility
Inventor
Key dates
| Filing date | Oct 4, 1977 |
| Grant date | Sep 25, 1979 |
| Priority date | — |
| Expiry date | Oct 4, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Apparatus is provided for controlling a parameter of an arc welding machine, such as the height and/or the lateral position of the welding tool. The apparatus includes a parallel circuit having first and second branches connected to a source of voltage, wherein the first branch includes the arc welding machine to be controlled, and wherein the second branch includes an electrical analog of the current-voltage characteristics of the welding machine when operating as desired. A differential amplifier is provided for comparing the current in the first and second branches and providing a parameter-indicative signal representing the current difference between the first and second branches. In addition, a control circuit is responsive to the parameter-indicative signal and is provided for adjusting various parameters of the welding machine, including the height of the welding tool and/or the lateral position of the welding tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.