If both of those test work then it is qa setting in MACH You can test the torch fire itself by simple shorting the two wires going to the torch fire connection together. If the relay has +48 from the same supply that poweres the G540 than it will turn on the relay. All the output does is when active connect the OUTPUT pin to output common.(-VDC). Does it turn on the relay? If it goes not you have the relay wired wrong or it is not a conventional DC relay.
Get a jumper wire and test from the Output Terminal your relay is attached to pin 12 (-VDC). The power source you use for the relay has to have it's neg side tied to Motor Neg for it to workġ. The relay you use needs a voltage source (equal to the rated coil voltage of the relay) on the + end of the relay coil, and the - end of the relay coil is tied to the output from the G540. It takes the output from being "open" to Motor NEG (common) when you turn it on. The outputs on a G540 are "open collector" with the common tied back to Motor Neg. You can even test it with a jumper but as stated it won't work with a hand torch. In actuality all you are doing is shorting the pins designated as "START". The CPC connector on the back has all of the signals you need to do a CNC interface IF you are using the Machine torch setup. Once you get there you will have lots of other stuff to deal with (:-) Any NO relay set of contacts on a relay you can trigger with the G540 Output as per their manual, will then work to turn on the torch. If you do have the hand torch you will need to find the torch switch wires coming from the hand torch (there are two wires for the switch) and tap into each wire using something like the ScotchLoc wire taps.
iI ordered 2 relays today I might need futher help!īiggest problem I see is that the 45 will not allow you to fire a hand torch using the START inputs so it doesn't matter how you hook up the G540. Requires dry contact closure to activate.pins 3, 4. Thanks the cutter is a Powermax 45 it states in the manual that Start (start plasma) Normally open 18 VDC open circuit voltage at START terminals.
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