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« on: July 03, 2010, 06:44:27 PM »
I am presuming you are meaning the drives (amplifiers) are analogue as servo motors are just motors and dont care what signal the drive gets..
If the drives are analogue only then yes you will need an external device such as K-Flop ( I think you also need the K-Analog board ) or you could also use the DSPMC motion controller. There is also a board that will do the conversion from StepDir to +-10v, its called something like YAPSC but I have no idea whether its any good where as a lot of people are using the K-Flop and DSPMC with Mach and get great results.
Check however that your drives are definitely not capable of Step/Dir as quite a few are capable of different modes, the Allen Bradley ones I use can be set up for various analogue modes and also various position and follower modes, ie Step/Dir.
Hood