@OwenD hi we are not using a GMAW process. But thanks for the informations it's still interessting and some things may bay the same for our process.

@dc42 in the best case one signal to start the welding process at the beginning of the print and one to stop. However it might be that it's necessary to adjust the voltage, amperage or wire feed speed once in a while but definitely not every G-Code line. Thanks for the help!

@dc42 thank you for your fast response. Commands would be sent to start and stop the welding process and to control the wire feed rate, the Amperage and the Voltage of the power source. So theres no need for a realy fast communication. Firmware changes sound quite complicated, is that a services one can purchase from DUET3D ?

Hi everyone,
I'm working on a project in WAAM (wire arc additive manufacturing). Now I was thinking about using a Duet 3 6HC Board as CNC Board. Next to a polar printer based mechanical setup I'm using a welding power source that must be controlled via ModBus rtu. Has anyone recommondations how to link the Welding power source with the cnc? I'm a mechanical Engineer so I'm not too deep in the subject but as far as I understand the ModBus I probably need an additional microcontroller (Master) like the Rasperry Pi with an RS485 interface to controll the Welding Power Source (Slave) via the G-Code from the Duet. Or is there a simplier way of controlling the axis movement and the welding power source.
I appreciate every help.