Re: [CAD_CAM_EDM_DRO] Help using a computer power supply to operate a stepper controller

Hi, switcher supplies will lock up if not loaded. at computer supplies can
be used if you load the 5 volt section with about 1/2 amp of load. I use a
10 watt 10 ohm resistor and put it on the heatsink inside where the fan will
keep it cool. cul brian f.

----- Original Message -----
From: "racingjewels" <sales@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, March 07, 2002 12:46 AM
Subject: [CAD_CAM_EDM_DRO] Help using a computer power supply to operate a
stepper controller


> Hi,
> I would like to know if anyone knows how to set up an atx computer
> power supply to run a stepper controller...
> I have figured out all the power supply wiring , But as soon as the
> 12 volts/8.5 amp lines are connected to the stepper controller, the
> power supply turns off.If I connect a small 12 volt fan to the power
> supply, it works with the fan only.
> I am running a 5 volt line to the stepper controller to power up the
> board... when any set of wires are connected , the powersupply shuts
> off
> There is a wire coming from the power supply called " computer Good".
> I assume this wire sends a signal to the powersupply which informs
> the power supply that the mother board is good..and to allow the
> power supply to work..
> What I don't know is how to get the power supply to stay on...
> I am using this as a test before buying/ building a larger power
> supply to handle all three motors...
>
> The motor connected to the controller is a 3.6 volt 4 amp/phase (
> which I believe is 8 amps) unipolar motor
> Any help would be appreciated.
>
>
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