i am going to buy Micro Maestro 6-Channel USB Servo Controller board. I just want to know is it possible to operate servos with different frequency at same time i.e. using 1,2,3 channel with 50hz and 4,5,6 channel with 300hz at same time?
The Micro Maestro does not support multiple frequencies. However, with the Mini Maestro you can have two separate frequencies for two groups of servos. The frequencies you specified seem to fit the requirements for doing this fine. You can find out more about this in the “Advanced pulse control options are available:” subsection of the “Channel Settings” section of the Maestro User’s Guide.