In my previous post, the robotic glockenspiel played its first tune. This post is an update on transcribing more tunes.
I’ve been busily transcribing public domain Christmas carols from “The Oxford Book of Carols” and other sources of public domain carols, so the glockenspiel has more material to play. All the carols are checked into the SD folder of the Robotic Glockenspiel Git repository, and are part of that open source project.
In other news, I bought this edge guide for my router, so now I can cut the grooves that will hold the base of the glockenspiel. Next I need to learn how to make rabbet joints, so I can put the glockenspiel box together.
My next post is about crafting the cabinet for the glockenspiel.
In my previous post I pointed to my Open Source code for the project. In this post, I describe the mounting of the solenoids to the frame.
The conundrum of the project has been how to mount the solenoids to the glockenspiel. If I were a metalworker, I’d probably tap the solenoid holes and fasten them with 2mm screws into a metal strip. My 2017 future self says to design a 3D printable holder. Not knowing how to tap such tiny holes and not (yet) knowing how to design 3d printed parts, I’ve been thinking and thinking about how to mount the solenoids to wood.
One day I was wondering out loud how to fasten the solenoids, and Linda said “Why don’t you just buy a router? They’re perfect for that sort of thing.” So I did.
My first attempt with a router was pretty sad. I had imagined that since I knew the basics I’d be fine. A few unintentionally-diagonal cuts later, I realized that making the solenoid channel cuts freehand wouldn’t work: I’d need a jig to let the router cut exactly the width channel I needed.
So using the router and a makeshift fence, I made a little height-adjustable jig. The first attempt at the jig turned out badly, but I’m happy with the second try:
If I were to make jig revision 3, I’d change a few things:
use wider wood to give the router more base to glide on
make the gap large enough so I can clamp the wood to be worked to the jig.
use a plunge router so that the ends of the jig are solid rather than open. Doing that will make the end less likely to warp and bend apart over time.
At any rate, I made a test slot using this jig, and it turned out great!
Now I’ve marked the real solenoid bar, and am ready to route the 19 solenoid slots.
In my next post, I describe the last steps to a functional robotic glockenspiel.
Et proiectus est talpa – "and the mole was cast out"