Now that I have some basic things figured out, it’s time to build a working robotic instrument.
Second test: servo with arm
How well can a standard hobby servo play a drum? I’ll start off more simply, by playing a bell with a metal rod.
This circuit is really simple, but now I’m starting to get into more mechanical engineering, if one can call it that.
Hobby servos move slowly but accurately, and with fairly high torque. I used a long arm to even this out, but the contraption is still no funky drummer.
The arm hits the bell! It does so slowly and with excessive caution.
In this setup, the main control is the range of motion of the arm – it’s pointless to swing it very far away from the surface bell.
- It’s easy to mount a drumstick and predict where it will go
- The drumstick’s range of motion is under precise control
- The servo moves slowly, so it can only play really slow tempos
- It may be difficult to play at varying velocities
- With a rigid attachment, there’s no room for recoil or bounce