Dust Collection - Table Saw and Router Table #3: Control Box
To sense current and turn the vacuum on I used a variation of the circuit that I developed for miter saw dust collection (find a discussion of that circuit here). In this case, though, I need two current sense circuits: one to switch on the shopvac and the second to activate the solenoid on the vacuum valve when required. Here is a schematic: Note the way the current transformers are wired. The line feeding the table saw only goes through the current sense transformer that activates the shopvac. The line that feeds the router table goes through both current sense transformers to activate the shopvac and the solenoid on the vacuum valve. When connecting the vacuum lines to the...
