Re: blown Gecko - shorted output ?

For de-soldering, I typically cut the part out , leaving as much of
the leads as I can. Then just pull each one out as the sodler
melts. seems to be much easier than getting all 3 loose at the same
time.

Dave

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "James Cullins"
<jcullins@c...> wrote:

> I have fixed them by replacing the mosfets, you can get them at

Digi_Key.

> You need t0 check the large resistor close to the mosfets to make

sure it is

> not open.
> the resistor is less than one ohm at about 3 watts I believe. I

ordered both

> form Digi-Key.
> De-soldering is a bit of a job.
> good luck
> Jim Cullins
> Sound Logic
> ----- Original Message -----
> From: "resosys" <resosys@y...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Wednesday, March 26, 2003 4:10 PM
> Subject: [CAD_CAM_EDM_DRO] Re: blown Gecko - shorted output ?
>
>
> > Dave et all,
> >
> > > I blew us a couple Gecko 201's over the last week. Yeah, I'm
> > > thinking of pre-purchasing some of the more bullet proof ones

when

> > > available.
> >
> > I've done the same thing and was wondering if you'd discovered the
> > problem and found a fix? I read this entire thread and found I'm
> > living a parallel nightmare to yours :-).
> >
> > I've got an almost identical setup to yours except my machine

chassis

> > has no 110AC ground attached since I'm using a plasma torch as a

cutter.

> >
> > <snip>
> >
> > > I bench tested a stepper, worked great. mounted it on the

machine

> > > and pop. blew something in the Gecko. Mariss said it might be

the

> > > outputs but only testing will reveal the answers.
> >
> > I've tested the motors and wiring with my last working 201. It is
> > still mounted in the controller box and working right next to the
> > blown one.
> >
> > > what irks me is that one axis has been solid for the duration,

runs

> > > perfectly. the other had 'eaten' 4 Gecko's. as you can

imagine I'm

> > > not excited to just throw on another Gecko to see what happens.
> > > What bothers me is that I ran all weekend with no problems. 2

I blew

> > > on setting up. I assumed that I did something stupid, but now

that I

> > > blew up another 2 with everything I knew to test, tested, I am
> > > nervious.
> >
> > Me too. I'm afraid to take the working one out for fear it will

get

> > snooty and give up the ghost.
> >
> > Any info you received from Mariss or others would be much

appreciated.

> >
> > Thanks,
> >
> > Chris
> >
> >
> > Addresses:
> > FAQ: http://www.ktmarketing.com/faq.html
> > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
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> >
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wanliker@a...,

> timg@k...
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> >
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reach it if

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> > http://groups.yahoo.com/group/jobshophomeshop I consider this

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there, for OT

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> > List Mom
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