Re: [CAD_CAM_EDM_DRO] Power Supply

Ron,

The white paper on the geckodrive web site has most of the answers.

For the power supply 14 amps should be enough.

Bob Campbell
Bob@...
www.campbelldesigns.com
Breakout board
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Stepper Motors
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----- Original Message -----
From: "Ron K" <godsone@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Friday, July 02, 2004 8:49 PM
Subject: [CAD_CAM_EDM_DRO] Power Supply


> Hi all
> I have a question for the electronic guys out there .
> This is something that I have disagreed with for a long time, but I
> don't open my mouth until I have some facts to go with it .
> ( I'm the try it and see if it works type , not the work it out on
> paper type )
>
> If I want to build a stepper control with the following specs how many
> amps do I need out of the transformer !!!
>
> 3 Motors , Slo-Syn 840 oz size 42 3.6V 6.1A. ea.
> Using 3 Gecko 201 drives with no current set resistor ( set for 7 Amp
max )
> Power supply puts out 49.5 Volts at idle and 48 with all motors turning .
>
> From what I have seen on the list this should require something like 12
> to 18 Amps !
>
> WEELLLLL I'm running this system on a Bridgeport clone called a
> Wizard and it is set up as follows .
> Power supply puts out 49.5 Volts at idle and 48 with all motors turning
> . ( this is checked at the cap )
> There is a single fast blow 5 amp fuse coming out of the capacitor and
> then a 4 amp fast blow fuse to each Gecko .
> I have never had any of these fuses blow so to me that would indicate
> that the entire system is drawing less than 5 amps DC .
> How can this be wrong ???
>
> In reality the 5amp fuse was a mistake I thought I had put in a 10amp but
the system has been running like this for several months .
>
>
> --
> Ron Kline
>
> American Precision Ceramics
>
>
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