Hi,
most of these servos have both differential signal inputs and single-ended inputs.
Differential (+- 2.5V) step/dir inputs are usually good to 500kHz whereas single-ended (0V-24V) are good to about 200kHz.
You first need to decide what resolution you want and what the max speed of the servo will be.....and that will in turn determine whether you use
differential signalling or single ended. Although....if memory serves, the step/dir outputs of the MB3 are all differential anyway.
Post the manual of the servo.
As a side note....you have saved a few dollars by buying this cheap servo....but the documentation is bound to be Chinglish and whats the bet there is NO set-up and tuning
software. Next time buy Delta servos, you pay about 25% more but get great backup, documentation.....and MOST importantly free set-up and tuning software.
Craig