am i right if i say you talk about the communication between mach -3 and the servo controllers.
i think the original question is about the servo controller on its own, ie will the hard/software on the controller do anything if the encoders are changed during disable and the drive is then put back to enable. lets assume mach3 isn't connected at that moment so no extra pulses can be transmitted...
simpson please correct me if i'm wrong...
No the drive will only move on a command from the controller.
If you wanted to go back to the original position you would have to have the encoder output from the drive going back to Mach and read that info on an enable and if different from where Mach thinks it is then have it move with a command. You would have to be carefull though as you may get an unexpected axis movement and in a lot of situations that would not be a good thing.
If you are using a drive as an indexing drive for something like a tool turret or spindle orientation then if disabled and moved the drive will keep a not of the encoder and when you command a further index it will move to the correct position but not until a move has been commanded. Or at least that is my experience from my drives.
Hood