idiots guide to servo motors and drives please

DC Servos can be paired with almost any DC drive as long as the motors current and, to a lesser extent, voltage are comparable to the drives output.

AC servos are a different matter, some drives can be configured to use motors from other manufacturers and others can only be used with the motors meant for them. Some AC drives require resolver feedback, some incremental encoder feedback, some serial (sine/cosine etc) and some can use more than one.

So as has been said by Gerry, unless you know a bit about them, or want to investigate/learn, then it is best to go for a matching pair of motor/drive.

Most modern AC servos will be capable of Step/Dir , some makes have different models within the range that are analogue command or step/dir but not capable of both, so you have to do a bit of reading before you jump in and buy them. Having said that there are controllers available for Mach that can utilise analogue command servo drives and they actually have some benefits over Step/Dir controllers. I use the CSMIO/IP-A  but there is also the DSPMC, Galil, Kflop with Kanalog.

Hood

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