except for turning the speed controller on the jogbox, and there is no super-duper-override for that. If the operator turns it down to 10%, then the machine will only move at 10%.
I don't know how hard or easy it would be to take the jogbox apart and disconnect the speed dial. If the operator is doing that to milk a job, then show them the door and let it hit them HARD in the backside as they go through.