I have new setup on new computer. Full Spectrum PS36 Laser with Ruida controller. I have LB running on GMKtec computer also same issue on Dell laptop. Each time I have had to do a manual setup. I selected the CO2 inches/sec with my 36 x 24. It is connected with ethernet cat6 on new windows 11. Did a simple square and normal setting, hit send and then get this error : There was a problem sending data to the laser. The machine may be busy or paused. I created a static IP address thinking that might help, but no. Machine is on, not sure what to do next. Thank you in advance!
The doc gives some procedures & debugging tips:
If you’re connecting the Ruida controller and your PC to the LAN, rather than directly, this rather lengthy discussion covers the problems arising from having the controller’s IP address squatted on by another device due to the router’s DHCP:
If those don’t get it running, then screenshots of the Device setup and the Windows network setup will let us look over your shoulder.
I went through the information you gave me. I had done everything but install the FTDI driver before, so I went back into the install and did that. I have rebooted and it still shows busy.
I have checked my cables, emergency stop. The top is closed. The only other thing is my controller does not show the gateway, but does have the static IP in there. I did hit finish on device.
You have network errors. You cannot have an address of 192.168.2.x on a network with a 192.168.12.1 gateway and 255.255.255.0 subnet mask. You need to change the address of the machine to 192.168.12.x otherwise it will never work.
That’s for the serial / USB interface, so it has no effect on Ethernet communications.
The Windows network settings show you’ve manually set the PC’s IP address (192.168.2.2) to a different subnetwork than everything else (192.168.12. x). The Mask field value (255.255.255.0) means the PC cannot communicate with anything else on the network, which is probably not what you want.
Unless there’s a compelling reason, the PC should be in the same subnetwork as everything else.
As far as addressing goes, both the Ruida controller and the PC have the same IP address: 192.168.2.2. However, each network device must have a unique IP address.
Do this:
- Change the PC’s IP address to 192.168.12.2 to fix the subnetwork mismatch
- Using the Ruida display / console, set its IP address to 192.168.12.202
- Edit the LightBurn Device to use the IP address 192.168.12.202
That gives the Ruida controller its own IP address that’s different from the PC and tells LightBurn what address to use.
Now the PC should be able to talk to everything else on the network and the Ruida controller.
However, the PC does not need a static IP address. If you changed that setting from Automatic / DHCP to Manual, you can change it back and, as long as the subnetwork remains the same, everything will should continue to work.
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Thank you SO much for the complete details including numbers to use. I was able to get my PC to talk to my laser with those settings. Problem is it is not sending the same settings I put into LB to the controller. I sent speed 10 and it cut at 200. Not sure if you can answer this question or should I start a new post?
I am so happy they are talking LOL That is a start! Let me know Thanks!!!
You have LightBurn set for speeds in inch/sec, but Ruida controllers use mm/sec. LightBurn handles the conversion, so 10 in/s will display as 254 mm/s on the machine when the job is running.
However, when the controller isn’t running a job, it displays speeds and powers corresponding to whatever was set with its keypad. The controller’s manual will tell you (using cryptic terminology) how to set those values. They apply in the (rare for me) case where you’re using the laser like an Etch-a-Sketch toy in manual mode from the keypad.
The convention for COâ‚‚ machines is mm/s, but you can set the LightBurn Machine Units to use inches for the Workspace layout and mm/s for the machine speeds:
You should always include the units in forum posts, because “speed 10” can be either a lethargic 10 mm/s or a peppy 254 mm/s. In particular, because inch units are rare-ish for CO₂ machines, everybody will assume 10 mm/s. 
Ed thanks again for the great explanations! You got this ole Great Granny up and running on my new computer. LOL Hope to never see a blue screen again.
I printed what you wrote and put it in my laser tool kit just incase I ever need to set up another computer for this laser and have these issue. Off to lasering 
Migrating your LightBurn settings will save your sanity: