I have searched the forum and have tried all of the troubleshooting tips provided. My iMac is still not connecting to my Ruida CO2 laser via an Ethernet connection. I have manually tried to connect them so many times using the “subtract 100” method recommended (for the last series of numbers of the IP) and it still reads “Disconnected” every time. Tried uninstalling and re-installing with no luck. Help!
This discussion covers the information that will let the hive mind figure out what’s going on:
Because you’re using a Mac, rather than Windows, the details of pinging the laser will be slightly different. A casual search suggests this approach:
Screenshots and photos of the controller’s console showing its IP address will help us see what you see.
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Hi Jennifer, welcome to the site. 
Can you give us some details on how you are wired up? Such as does it go directly to your router, pc, switch or? Can you tell us you lan ip and your Ruida ip?
Does your Ruida machine console indicate you’re connected? There is also an led on the Ruida that also indicates link.
Generally the laser should be visible on your network, like any other device that’s on your network.
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My Mac is connected via Ethernet and I am not using Wi-Fi at all to connect to my Ruida.
I verified that my IP is not being used for another device. My laser says “LAN ON” and when I PING, I get the 64-bit message indicating that the laser and my computer are communicating just fine. However, in LightBurn when I right-click on “Devices”—I still see the “Disconnected message.”
I have gone through all of the troubleshooting steps over and over again, including:
clicking on the “Read” button in Machine Settings where it shows an error, making sure I have granted local network permissions, plugging the Ethernet cable directly into the Ruida controller (rather than in the external port), and clearing the controller memory—among other things.
Do I need to purchase the Bridge? I’m worried it won’t be as reliable as a direct Ethernet connection since we don’t use a lot of Wi-Fi. My Mac is located in our home office about 50 feet away from the laser—between several walls.
Thanks for your help! I feel like I have tried everything!
LAN IP = 192.168.86.1
Ruida IP = 192.168.86.249
Sorry for all of the replies. It won’t let me edit…
LAN IP = 192.168.86.1 (Google Nest) but we are not using Wi-Fi, so I ruled that out I think
iMac IP = 192.168.86.249
Ruida IP = 192.168.86.249
Okay, I think I’m tired.
My LAN IP (iMac) = 192.168.86.136
I tried switching up the last segment of numbers and ran this test. The newest IP (192.168.86.101) is showing “incomplete” which I guess shows that the laser didn’t replied to the request.
I hope you attempted to set up the device manually in Lightburn?
I’ll have to sleep on it, it’s later here also.
Show us:
- A photo of the Ruida display showing the IP address set there
- A screenshot of LightBurn
Basic Settingstab inDevice Settingsshowing the IP address set there - A screenshot of the Mac’s
Privacy and Securitysettings showing LightBurn has permission to access the network
Please don’t change anything after taking those screenshots, because then we’ll be solving a different problem.
Yes, I did.
I will get those screenshots later today.
I had to change to .101 because I discovered the .249 was just pinging to a different device. I tested the .101 with the machine off and it still gave a “request timeout” message—so I’m hoping it is available.
Do you have a router that you can set up the DHCP to use the defined IP and associate it with a MAC address?
My Ruida is in the middle of the rest of my devices, I have told the router that is a reserved address.
I tried on one of mine, to use the add 100 option. I found on mine, it doesn’t seem to talk to devices outside of it’s range. Never seen this before.
I use a piece of software from the 60’s called ARP-SCAN, this scans the local lan and gives you information on what’s hanging out there.
My laser is on 192.168.1.115
And now it’s .28; you see why screenshots help us follow along.
Without changing anything …
- With the laser turned Off, what is the result of a
pingto 192.168.86.28? - With the laser turned On, what is the result of a
pingto 192.168.86.28?
In LightBurn:
- In the
Laserwindow, clicking theDevicesbutton should show the single entry you namedRuidain the list. Drag that list over near the theLaserwindow and screenshot them together to let us see what you see. - Step through the device setup until you get to the
Summary, which will look something like this:
- Screenshot it so we can verify the setup.
If all that checks out, then it’s looking like a real puzzle. 
Should that Gateway address be 255.255.255.1?
Yep, I changed it to .28 because .101 was being used already apparently.
Thanks for your help. I may just order the Bridge since nothing is working. I’ve been trying all day, walking through the suggested troubleshooting steps with no luck.
Here are the screenshots you requested:
My subnet mask is showing: 255.255.255.0
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