re:stepper pwr suplies wasRe: motor/leadscrew/ps recomendations

I don't understand the use of the resistor for the .5v drop.

~+.5v
+24v DC---------------[R1, .01ohm]------------[load]
|
|
-[10k cap]-
|
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GRD ----------------------------------[GRND]

I thought a cap was to stabilize the circuit. If I remember my
electronics right...

If I put a large quick drain on this circuit, the current through R1
will go up, increasing the voltage drop, CHARGING the cap. If I stop
drawing current, the voltage drop on R1 will decrease, DISCHARGING
the cap.

This would not stabilize the circuit at all.

If R1 was not there, a spike load on the circuit would drop the
voltage, discharging the cap, stabilizing the output?


Roman, what is the resistor for?


--- In CAD_CAM_EDM_DRO@egroups.com, "Roman Black" <fastvid@e...>
wrote:

> From the output of the switcher use a small
> series resistor, say 0.5v drop at max current,
> and then add some big filter caps of a high
> quality low impedance type like used in audio
> amps. Most stores sell these. also there should
> be about a 1/3 of your total capacitance value
> as close to the driver bridge as possible,
> as usually these are some distance from the
> power supply and main caps.
> -Roman