Non-contact switch for thermal cutting equipment

Abstract

The invention relates to a non-contact switch for thermal cutting equipment. The non-contact switch is characterized by comprising a first photoelectric coupler and a second photoelectric coupler, wherein input ends of the first photoelectric coupler and the second photoelectric coupler comprise a current-limiting resistor and an internal light transmitter which are connected with each other in series; output ends of the first photoelectric coupler and the second photoelectric coupler comprise internal light receivers; the internal light transmitter and the internal light receiver of each photoelectric coupler are corresponding; the input end of the first coupler is connected with a plasma power generator; the output end of the first coupler is connected with a CNC numerical-control system; the input end of the second coupler is connected with the CNC numerical-control system; and the output end of the first coupler is connected with the plasma power generator.

Description

technical field [0001] The invention relates to thermal cutting equipment, in particular to a non-contact switch for thermal cutting equipment. Background technique [0002] At present, thermal cutting equipment in shipbuilding equipment, such as CNC plasma cutting machine and CNC flame cutting machine control circuits, generally use mechanical contact switches to transmit control instructions and communication commands. This method can ensure normal operation in the initial stage of new equipment, but the operation After a period of time, the cutting equipment is prone to failure, has a low practical life and is difficult to maintain. Contents of the invention [0003] In order to overcome the deficiencies in the prior art, the purpose of the present invention is to provide a non-contact switch, which avoids the mechanical jitter, surge current and surge voltage generated when the mechanical contacts are opened and closed, and also reduces the original function of the dev...

AI Technical Summary

Problems solved by technology

[0002] At present, thermal cutting equipment in shipbuilding equipment, such as CNC plasma cutting machine and CNC flame cutting machine control circuits, generally use mechanical contact switches to transmit control instructions and communication commands. This method can ensure normal operation in the initial stage of new equipment, but the operation After a period of time, the cutting equipment is prone to failure, the practical life is low and maintenance is difficult

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