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    Quote Originally Posted by gatesy View Post
    Having looked at the offering on various trade sites such as alibaba they have new 200v ac servos and drives for not a lot of money direct from china, which do not need a separate power supply, and should I wish to upgrade in the future they accept a 10v supply rather than step/direction. Buying one of these should be a plug and play setup, whereas trying to get the Fanuc servos up and running without the relevant info could be a lot of hassle.
    Yes given the fact of not knowing the spec's etc then it would make sense given the prices. Not sure if you saw my Mill post where I recently bought some of these Cheap chinese Servos if not it's here take a look. https://www.youtube.com/watch?v=tW8knRAOr7s
    So far just on the bench I'm very happy with them considering the price but time will tell when on machine.

    Quote Originally Posted by gatesy View Post
    Alternatively I could get some AC servos and drives from CNCdrive for not a lot of money, which are also 48V.

    I have tried contacting CNCdrive twice about their servos and drives, as to if they offer a 2500 line encoder instead of 1000 line, and if their drive will support this, or if they know if it will run a fanuc servo but have had no response. Doing the calcs though with a 1000line encoder which is their standard fitment it still gives me a resolution of 0.0025 which is more than enough.
    Reading the Drives data they are more than capable of handling 2500ppr encoders so can't see why not. But to be honest I'm not a fan of those plastic encoders they use(if used on there AC motors.?) and by the time you have bought decent encoders then the motors and drives you'll be at more money than the Chinese setup's delivered. For instance £250 will get you 200v/400W servo drive and motor with Encoder cables deliverd to Uk.!!

    Quote Originally Posted by gatesy View Post
    Is there any advantage going to a 200v servo over 48v, apart from not needing a separate power supply?
    Honest answer is I don't know to what or if an advantage.!! . . . I would imagine they make for a stronger motor because the higher voltage will allow more push so to speak and the obvious advantage of not needing separate voltage source. But honestly I don't care provided they work and are easy to fit which they clearly do and are.!

    Quote Originally Posted by gatesy View Post
    The 10v input is not important at the moment, as I have another machine that I could fit the step/dir input drivers too, and upgrade this machine at some point in the future
    Not sure what your meaning here because if you have Step/Dir drives fitted already then surely your Controller must be Step/Dir output.?

    Most Modern Servo's allow Both Step/Dir and Analog inputs but the controller must support them and provide +/-10v output that servos input use.!
    Last edited by JAZZCNC; 22-11-2015 at 12:40 PM.

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