sorry, I can't exactly explain this bug, in general, I started the excavator with 10 fuel, then I took 7, after a minute it stopped, but there were no messages, i.e. he does not view this script, then I tried to clear it with the excavatorclear command, a message about clearing appears, but I also wrote to me during some action that the player is already using it, without a nickname, then I reloaded the plugin, I also wrote excavatorclear, and I was able to run it, then the situation repeated itself, but I fixed it only by disabling the plugin and running the excavator with 1 diesel :)
any thoughts on this? :)

I am not able to duplicate the issue with the sequence described.  can you send your config file.
last time i say some issue with the detection of the excavator stopping , it was related to using the wrong version of oxide on the server
also, check the /excavator  for the status.

at this moment i can say only that /excavator wrote about excavator was free, and reboot plugin dont fix it, i try test it more exactly in evening today

Set the playercooldown to 0 to disable, it just in case ( prevent a player/team to use the excavator continously )
"CoolDown before a player or team can restart the excavator (0 is disabled)": 0.0,

Hi there, Im trying to figure out this setting.

"CoolDown before a player or team can restart the excavator (0 is disabled)": 30.0, 

is that if a Player/Team has used it, then finish, they have to wait that long before they can use it again, or is it for all players on the server need to wait?

Yes, if a Player/Team has used it, then finish, they have to wait that long before they can use it again.

the other parameter "CoolDown before releasing excavator": 3.0,
is the time before any player can use the axcavator again. its a time for the last user to loot the output piles before it unlock.