Hi Aarg,
It’s too difficult to get a photo of the actual CT sensors in situ as they are inside each of the devices they’re sensing. The live 240V mains is simply threaded through the donut of the sensor. I’m aware that the proximity of the sensor to other wiring will influence its behaviour, so have tried to locate sensor away from other wiring in the device. Not always possible though.
I have a controller for a sander, dropsaw, tablesaw router, bandsaw and jointer. It's important to note that the physical setup for each device is different and my objective is to design a sensor / controller setup that will work in a variety of environments.
The attached photos show a typical setup.
Each device has a controller. The photo of the sander controller with the cover off shows the 12V input, the sensor input from the sander and the 12V output to the solenoid opening and closing the blastgate. An onboard RF module on the Nano sends a signal to a Nano connected to a relay, which switches the dust collector on and off.
I’ve also taken a photo of a test setup, connected to a new version of the controller. The pot and displays allows for independent (from a laptop) calibration of the voltage threshold. You’ll notice I have both a TA12-100 and a ZMCT103C sensor connected to the test rig. This setup allows me to compare the performance of two sensors in almost identical conditions.
Michael
