When running a job with CNC12, occasionally two red lines of text will appear noting “452 Ethernet Communication Error, see Tech Bulletin 270”
If there is an ethernet connection loss of signal with the laptop, the job continues to run, unlike Mach4. That’s a good thing. The laptop does connect (pausing/ tool check still work), so I’m not sure what the ethernet loss is or what CNC12 is warning me about.
What is causing this? Is there a Tech Bulletin that users can review?
Thanks
Scroll down to number 270 on Centroid’s Tech Bulletin page:
https://www.centroidcnc.com/centroid_diy/tech_bulletins/browse.php
You’ll see TB#270 there to download.
Direct link: https://www.centroidcnc.com/dealersupport/tech_bulletins/uploads/270.pdf
Can you describe your setup a little?
Are you using our ethernet cable we supplied? Is that cable near any other cabling? (like your spindle cable and such)
What kind of PC are you running?
I am getting this same issue with almost every job. My hypothesis is that it might be because my dust collector is plugged into the same circuit and surge protector. I thought I had seen a thread on here last week, but I cant find it anymore 
I am using the supplied shielded ethernet cable. I was going to try a different circuit for the dust collection, and a double shielded cable, this weekend.
Maybe you have your computer on the same circuit as dust collection?
You can try to run a communications stress test:
You can run these as many times as you want, and you can try it with the dust collector on/off. It basically simulates a heavy load on your PC>Controller communications without having to actually run a job.
I will definitely try this this weekend!
Make sure your computer is turned on completey before you power on the control box with the Acorn in it.
I know both Centroid and AVID say this isn’t a requirement, but I have had issues on all 3 of the Acorns I’ve tried, and 4 different computers, and a couple others have tried this as well and got the same results. Sometimes I don’t get any connection at all (i.e. CNC12 won’t even start up because it can’t connect to Acorn), but sometimes it will start and be fine until i run a job. However, it will ALWAYS fail the above mentioned communication test if I don’t have the PC running first.
I like the dust collector theory. Mine randomly starts my dishwasher.
If mine did that I would take credit for it with my wife.
It won’t be due to my dust collector. It’s on its own 240V/ 1-phase circuit. The Avid spindle is on its own 240V/ 3-phase circuit. The Avid EX control box and my laptop are plugged into the same 120V/ 1-phase duplex outlet.
I haven’t tried Eric’s comm stress test yet.
FWIW, the problem isn’t isolation of the circuits, but rather grounding, and static electricity caused by the dust going through the tubing/hoses. So, it could still be the dust collector.
'lectrcity’s funny like that
