Abstract: An electrical discharge machine in which the operating state of a machining fluid cooler can be easily ascertained and adjusted. The machining fluid cooler comprises a body disposed on the rear side of a housing of the electrical discharge machine and a panel (21) disposed on the front of a control device (4) which is located at the front side of the electrical discharge machine housing. The panel is provided with a liquid thermometer (15) and a flowmeter (16), which constitute an operation parameter display section of the machining fluid cooler, and a power switch (17), a target temperature setter (18), a target temperture difference setter (19), and an operation mode selector switch (2), which constitute an operating section for operation parameter adjustment of the machining fluid cooler.

Abstract: A machining fluid temperature deviation alarm device is attached to an electrical discharge machining device which, having a temperature sensor (S1) for machining fluid temperature detection and a cooler (2) for machining fluid cooling, controls the cooler in response to a temperature sensor output signal, thereby controlling the machining fluid temperature within an allowable range. The alarm device employs a second temperature sensor (S2) for determining whether the machining fluid temperature is within a predetermined temperature range set by means of a second setter (5) and encompassing the allowable machining fluid temperature range.