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Topics - Sparc

Pages: 1
Modbus / Controlling Hypertherm Plasma via ModBus
« on: January 08, 2014, 04:54:25 AM »
Hi everyone;

We've build our own cnc plasma cutter and controlling it via Mach3 with smootstepper and panasonic servos.

Everything works fine.

What we want to do next is, to control the plasma generators current setting from mach3 gcode ( s command ) via modbus.

The protocol that hypertherm needs to receive on his Rs485 port is ModBus ASCII.

I've read here in forums that Mach3 do not send ModBus data in Serial/ASCII format.

My Questions :

1. Does it help if we use a ModBus RTU to ModBUS ASCII converter ( Hardware ) ?

2. If yes where can i find detailed information how we must configure and setup Mach3, so an S command in G-Code ( or some other way ) will send a given command ( it is cleared in the Hypertherm documentation ) to the Hypertherm RS485 port.

A lot of thanks in advance.



We want to use mach3 with the G41 and G42 codes. The wish is that if we push feed hold the torch goes off and the thc rises up. And then if "start" pushed that the system goes again.

It this in any way possible.

It would be nice if a tool dia ( kerf ) change will take effect after the "start"

Any ideas ?

Many thanks in advance



We are planning to make our own plasma table. We will use the Hypertherm Sensor PHC.

The target is to use the internal anti-dive function of mach3.
But this function diables only the Z-Axis movement.

How we can modify the function so we can have a signal on a given output port if the movement speed goes below the percentage given in OEMCODE 82?

Or must we have a special script for this.

Any idea will be very helpful. Best Regards in advance.


Pages: 1