I've been avoiding the use of modified servos as gearmotors because I'm under the impression that you don't have much control over their speed. My understanding is that you give them (via an analog servo pulse) a "position" that's ahead of or behind the center, and it will spin forward or backward attempting to reach that position. So, unlike a regular gearbox driven by a motor controller, you don't have full control over how fast it spins; just whether in spins and in what direction.
But is this true, or am I laboring under a misconception?
Thanks,
- Joe