An Arm

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.

2014 04 18 servo arm


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.

Good things

Worse things