On Tue, Oct 21, 2008 at 12:20:34PM -0500, Jon Elson wrote: > Well, that's a pain, for sure! I think a beefy step-down transformer > might do the trick. > Do you know what the DC bus voltage is supposed to be? 170 V might be a > bit high > for many servo amps, though. Perhaps a bucking transformer at the input > could get the > DC bus down to about 120 V, which should be about right for the SEM motors.
Yay, I found my information... DC bus unfortunately is 100V so no common step-down transformer will do it. The amps will do 14A continuous 30A peak, so you really need quite a few kVA especially if you are running the transformer under the rated voltage (6kVA + ?). If I remember right, the transformer I have waiting for this project is about 100lb. There is no way it will fit in the existing cabinet. I do not remember for sure but I think it is a 415 to 120 step-down to give about 70V. > Do you have any details on the servo amp enable and fault signals? I > have some info from the theory manual on the R2E3 (BOSS 8), but it is > not QUITE enough detail to be sure about these. The fault output is open collector, normal low, goes open on fault. For the enable inputs: "contact closure or suitable active device capable of sinking a peak current of 20mA and having an offset or saturation characteristic of less than 0.6V ... between inhibit and signal common" ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
