Hey Martin,
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when I search for “aviation connector”, how these are commonly called, but it is not a technical term, I find lots of these but also with the same problem: Their maximum cable diameter is not large enough. This may be the case because these connectors are not power connectors, or at least not for such high currents.
If I search at mouser.com and digikey.com, you maybe know that they have tons of connectors, and many without images, so this would be a search for technical data only.
For a quick search on mouser.com I chose:
Standard Circular Connector
Contact Gender = Socket (Female)
Number of Positions = 4 Position
Product = Connectors
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In the web, it is easy to find the connector that you show (example) or at alibaba etc., but they all have this problem: They are only for smaller cables.
On CNC forums, I saw persons who share my opinion that one could exchange both the socket and the plug. There is a reason why Mechatron does not make spindles with these connectors anymore and switched to Phoenix M17 instead. But M17 are more expensive and you need the four-mandrel crimp pliers for turned contacts, and you need to exchange the socket on the spindle too. The advantage is you don’t need to solder.
However since I never had such a connector like you show and never needed to search one, I am not sure if I am the right person to help you. Maybe people at other CNC forums know a source for a connector matching the one on your spindle, but for thicker power cables.
Lightning will do it alright. If it worked before but not now I would suspect a bad 1489 reciever chip in the Fanuc. If your PC and cable work on another machine, you can rule them out. You could replace the master board $$$. Or you could look on the lower portion of the master, pretty much centered from left to right and find the 1488 output and 1489 reciever buffers. ( they may have a 5 digit number but will end in 88 and 89) Back up your parameters and pc params as they will be lost when you remove the board. I usually leave the battery hooked to the board and replace at the machine when I do it, but Im too lazy to re enter the parameters. You will have to desolder the chip and solder in a new one which you can get at radio shack. I usually solder in a socket so future replacements are plug in. This will work 90% of the time. ( sometimes something is wrong further up.) Like I said earlier, Try to verify PC and cable on another machine if possible, but this is not too uncommon with electrical storms and a shop can have 30 CNC's hooked up and only one go out. Oh, and the 232 cable has to have been plugged in during the storm for this failure to occure, so if it was not .... never mind.
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