PURPOSE: To obtain a welding machine controlling device that does not require exclusive multicore cable for selecting welding condition in a remote place, free from generation of disconnection, and excellent in working efficiency, by counting the number of times of closing of output terminal of welding power source during suspension of welding and selecting welding condition according to the number of times of closing.
CONSTITUTION: A counting memory circuit 4 that counts and stores the number of times of short-circuiting of output terminals (a) and (b) is connected to a welding power source 1 that supplies DC power to a welding torch 2 and an object 3 to be welded. The circuit 4 has an auxiliary power source for discriminating short-circuiting or opening when the power source 1 is not outputted. A selector circuit 5 that selects welding condition according to output of the circuit 4 is provide. A prohibition circuit 6 that cuts off transmission of signal to the circuit 4 and prohibits rewriting of content while receiving welding signal from the power source 1 is provided on the input side of the circuit 4. When specified circuit between the torch 2 and weld zone 3 is short- circuited repeatedly at relatively short opening interval, the number of times of short- circuiting is counted in the circuit 4, and the circuit 5 selects welding condition according to the output, and supplies to the power source 1.
NAGASAKA MORITOSHI
SHIODA KOUICHI
| JPS50116356A | 1975-09-11 | |||
| JPS5722875A | 1982-02-05 | |||
| JPS5841672A | 1983-03-10 |