ActuatorOrchestra
@acutatororchestra.bsky.social
I'm making an army of musical instrument playing robots. Here's how it's going. This project will involve lots of 3D printing and electronics.
updated the UI a bit. Now i can make it make terrible sounds even faster.
June 18, 2025 at 11:48 PM
updated the UI a bit. Now i can make it make terrible sounds even faster.
I couldn't make all 4 strings work with the small diameter + the string depth. The slots overlap.
So, the new idea is just have 2 independent barrels per fret, each with it's own servo, and 4 combos. It'll double the servo count and complicate the controls, but it will cleanly depress springs.
So, the new idea is just have 2 independent barrels per fret, each with it's own servo, and 4 combos. It'll double the servo count and complicate the controls, but it will cleanly depress springs.
June 13, 2025 at 6:28 PM
I couldn't make all 4 strings work with the small diameter + the string depth. The slots overlap.
So, the new idea is just have 2 independent barrels per fret, each with it's own servo, and 4 combos. It'll double the servo count and complicate the controls, but it will cleanly depress springs.
So, the new idea is just have 2 independent barrels per fret, each with it's own servo, and 4 combos. It'll double the servo count and complicate the controls, but it will cleanly depress springs.
Here's some experiments with the geometry. One of the fatal issues so far is that the diameter is limited by fret size and the smallest slots are too big and blur into each other. I either need shallower slots or larger diameter, both of which are impossible due to the size of the uke.
June 13, 2025 at 12:57 PM
Here's some experiments with the geometry. One of the fatal issues so far is that the diameter is limited by fret size and the smallest slots are too big and blur into each other. I either need shallower slots or larger diameter, both of which are impossible due to the size of the uke.
I tried to print springs within the slots, but the detail was just way too small, quickly broke and, worst of all, were terrible springs.
June 11, 2025 at 5:03 PM
I tried to print springs within the slots, but the detail was just way too small, quickly broke and, worst of all, were terrible springs.
The SG92R servo has a plastic output shaft which is not dealing well with the 5mm set-screwed U-joints. So, I'm on the hunt for metal micro servos.
June 11, 2025 at 3:31 PM
The SG92R servo has a plastic output shaft which is not dealing well with the 5mm set-screwed U-joints. So, I'm on the hunt for metal micro servos.
This is so frightfully basic, and also the Uke hasn't been tuned up in 5 years. But, when I push the button, all four servos try and strike their string about 50ms appart to make a downward strum effect.
June 11, 2025 at 2:56 AM
This is so frightfully basic, and also the Uke hasn't been tuned up in 5 years. But, when I push the button, all four servos try and strike their string about 50ms appart to make a downward strum effect.