A friend of mine was complaining that the static air blower on his Ryobi scroll saw was an annoyance, making it more difficult than it should be to use. He'd seen newer scroll saws with articulated air blower arms, and wanted to know if it was possible to retrofit his with one. This project is the result.
It uses the ball and socket joints from Giuseppe Finizia's PCB Workstation with Articulated Arms, and adds a base plate and end effector to hold a standard sized piece of aquarium tubing.
The base plate and end effector are implemented in OpenSCAD, and can be edited to fit different applications (base size, air line diameter, etc). Both components import parts of the "BS_Joint.stl" file from Giuseppe's PCB Workstation, so changes to the base and end won't effect their compatibility with existing printed joints.
If you want to modify the SCAD files, it may be easier to checkout the source from the project's GitHub page.
Customize the SCAD files for the base and end as needed, then print them both along with enough of "BS_Joint.stl" to get the desired length.
Attach the base to a stationary part of the saw (I used 3M double sided tape), and fit the air line into the end of the arm. If the saw or tool doesn't have a built-in air system, you can use a standard aquarium pump.
If the arm moves around while the tool is in operation, you can tighten up the individual ball and socket joints by using a layer or two of tape or shrink tubing on each ball.