I'm working on a project which requires the control of a motor via a +/-10v control signal (which will be fed into an amplifier).
In theory any motor can be used, although it should be attached to a high resolution encoder (1024+ PPR).
A setpoint (theoretical position) is calculated 1000/sec, and the result used within a PID loop. The result is then outputted to an 8-bit DAC. To allow motion in both directions, values under 127 cause a negative signal, and values above 129 cause a positive signal. As such, the resolution is reduced to 127 steps.
Does this seem sufficient to achieve smooth motion, or should I choose a DAC with more resolution?