There seems to be conflicting information about this.
I ended up using 10.0.3.3 in this case for convenience reasons but documentation seems to indicate that the controller IP can be changed.
But I went looking for Adam indicating this after reading your post.
Here Adam is pretty clear that 10.0.3.3 is required but it might be only within the context of the Topic. Not sure.
However, in a couple of different places in the documentation it’s pretty clear that this can change.
The LightBurn Bridge is pre-configured to connect to a laser configured with an IP address of 10.0.3.3 . In the Ruida control panel, set the IP of your laser to this value, then connect a network cable from the controller to the Raspberry Pi, and plug in the Pi with its power adapter. If you need to change the IP address, please check out the Configuration Options, and please note the caveats to doing this, listed there.
If the either the Bridge or the laser are not found, you may need to change the IP address on your laser to 10.0.3.3 (the default for the LightBurn Bridge), or optionally, you can configure the bridge to use a different address for your laser.
laser_ip: The static IP address configured on your Ruida laser controller. By default you will need to set it to10.0.3.3which we’ve chosen because it’s unlikely to use this IP subnet for a private WiFi network. For complicated reasons, the IP address of the Ruida must be on a different subnet (the10.0.3part of the address) than your WiFi network. In general, you should never change this value unless this conflict exists.
It’s possible that the documentation reflects something that was at one time planned but never implemented but now I’m curious if this can indeed be changed. I may have a play at this.