USB Powered Shaker table for Acid Etching PCB's

When making hobby Printed Circuit Boards (PCB), one approach requires an acid bath (mostly ferric chloride) to dissolve (etch) away the copper that is not needed in the "traces" for the circuit. This project describes how to use a servo motor to make an agitator table for etching PCBs. Its more like a gentle wave machine and uses a Parallax Continuous rotation servo, with a standard "horn", and a Servo "Tester" to drive the motor. You can be up and running with this in about an hour. You might, instead, use an Arduino Nano to control the servo.
The design is laser cut and can use 3D printed legs, or the arched supports that are in the laser cut design. You can also cut this out by hand using project board.
The servo is connected to the "bath" with a wire, which provides a way to de-link the bath if needed. Varying the distance from the attachment point of the wire, on the servo horn (higher torque center of the horn), to the ends of the horn or changing the Test mode between slow, fast and sweep, can produce different wave patterns. A small container holds the PCB that you want to etch (usually face down).
The project costs under 30$, and you can probably get that down under 20$
- Servo tester (about 6 dollars) or less from Geek, has multiple modes.
- Parallax continuous rotation servo motor (under 15$)
- USB inline switch, just for convenience (under 2$)
- 1/8 (~3mm) inch board about 2' square "Hardboard" or project board and a hot glue gun
There isn't much to this project.
If using a laser cutter, download the SVG file for the cut (for a 40W CO2 I used speed 130, power at Full), for engraving the wave design (from internet) I used speed 400 and power at 20), your settings may vary.
If cutting this out by hand, from project board, or even foam board, use the pdf file to print out the pattern and cut by hand with an Exacto knife.
Glue the parts together (do not glue the sliding table to the support structure, or it can't slide).
You can 3D print legs instead of the arch supports (Shaker Leg.stl), or assemble the supports that were cut from the pattern, then glue the assembled support to the top section.
You can also use other, even smaller servo motors.
One image above shows the cut out support and another shows the 3D printed legs.

[@punevloger]

hi can i get file

[@dominickballard3311]

👍👍👍👍👍. I am suprised that you haven't researched Promo-SM.