Re: [CAD_CAM_EDM_DRO] Re: 2 Fried G210's in a single day :-(

----- Original Message -----
From: Nicolas Benezan <bene@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, May 06, 2002 2:42 AM
Subject: Re: [CAD_CAM_EDM_DRO] Re: 2 Fried G210's in a single day :-(


> Peter wrote:
> > Sean, you were very gracious (in defeat) to share your experience and
> > hopefully save others from the same misadventure.
>
> One more hint I have to add:
>
> NEVER try to run a Gecko from a regulated power supply. A friend of mine
> did and fried his Gecko immediately at the first power up. I think, what
> happened was that the motor began to oscillate due to the wrong
> gain/damp adjustment. A regulated power supply can source enough current
> for the gecko while holding the voltage exactly constant. But only few
> of them are designed to _sink_ current, when the motor is acting as
> generator which it does repeatedly when it is oscillating. So the
> voltage rises in an uncontrolled way overloading the power transistors
> of the Gecko. We replaced the FETS but with no luck. Seems that the 5V
> regulator was fried, too.
>
> So always add al _large_ capacitor to the DC supply. I even add a
> seperate "energy absorber" (large Zener diode or
> Zener-transistor-resistor combination) to my setups because I don't
> trust the capacitor alone.
>
> Ciao
> Bene
>
> --
> !!! Achtung, neue Adresse !!!
> Benezan Electronics, Maria-Merian-Str. 20a, 70736 Fellbach, Germany
> Kundenspezifische Elektronikentwicklung, Sondermaschinenbau
>
>
>
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