Discussions

I'm looking to build a DIY headtracker found on this site but need help determining how to chose the correctly sized servo for the pan/tilt mount.

1) What numbers should I be looking at on servo specs that correspond to the size/weight of my camera? Should I be looking at the torque and just getting a servo that has more torque then the weight of my camera or are there other numbers to look at and consider like the extra force of air resistance? I would obviously want the lightest servo's that will do the job (well).

2) Will all the servo's have to be the same size/torque? I didn't know if the pan servo could be smaller then the tilt but I assume not.

3) Is there a point where the camera gets larger and larger when it would make sense to not use servos with plastic gears or a general rule to abide by? Are there other concerns with plastic gears. I like the plastic gears because they're lighter but concerned about performance with weight and over time with a 300g camera.

Thanks in advance!