Re: [CAD_CAM_EDM_DRO] Servo amplifier boards.

johndroc@... wrote:

> Jon,
>
> Thank you, very much, for the information. I was able to get the
> X-axis
> working today - properly. I had incorrect settings for Output Scale
> and
> Max_Velocity; after I set those I achieved oscillation in the table, I
>
> tweaked the Tach and Signal adjustments a few times, and it seemed to
> be
> roughly tuned. I think the Y amp is dead, I surmised it before and
> switched
> the X and Y amps - now X works and Y doesn't. It has a tendency to
> "slam"
> into the -Y. I don't know if I'll be able to find any
> ServoDynamics(?)
> replacement parts; that will be the next challenge. I'll switch out
> the Y
> and Z next, to see if the Z board works on Y. Thanks again.

These are Servo Dynamics amps? What model? The major parts in it are
pretty
pedestrian, although they may use power fets with Japanese numbers.

A tach problem, tach phasing or motor phasing could also cause the axis
runaway
problem.

Anyway, sounds like real progress!

Jon