Mechanical Wave Driver for Chladni Plate

Step 4 Vibrating Rod

Back to the coil form. I used a sink strainer as the support cone for the rod. It fit perfecty on top of the lip of the coil. Pull the little knob in the middle of the strainer out with a pair of pliers while trying not to bend up the strainer. Use the hole left to insert your threaded rod. You only want the very bottom of the rod inside the strainer. Attach the rod with a lock nut on each side of strainer. Use vise grips to hold rod in place. Make sure the threaded rod is setting straight up/down. Should look like little bell.
Now place strainer on top of coil form in speaker. Make sure the metal is not shorting speaker wires. Use hot glue to level out and then hot glue into place.