Hydthc XPTHC-4 - Page 19

深圳市宏宇达数控技术有限公司
地址：深圳市南山区中山园路 1001 号 E4-6C(TCL 国际 E 城) TEL：755-26625800 FAX：755-26729960
-19-
Follow is the connection of the NPN proximity switch(NO). See Fig 3-2 shows
Fig 3-2 NPN proximity switch connection
The work process of the proximity switch：When THC gets the arc start signal from the CNC
controller, the torch goes down to touch the cutting material, then the proximity switch takes off
the proximity point, and send out the touch signal, after the THC gets this signal, then let the torch
goes up to the IHS height(the proximity switch will auto return to original position during torch
goes up). After the IHS is finished, then THC will control the plasma arc on.
In this way, it’s suitable for any plasma’s IHS.
Fig 3-3 XPTHC-4 Proximity switch
and micro switch
+15V
SIGNAL
COM