Re: [CAD_CAM_EDM_DRO] Re: Stepper Dissasembly

Marris:

Yes, I've seen that technique before. I had one tech who changed the
same SCSI drive 4 times before he figured "gee, maybe its the controller".
Usually, one repitition is enough. I think alot of these stories get started
because someone like my wife ( who has trouble identifying a screwdriver
from a wrench) dissassembles something, then claims it can't be done when
they fail. All who believe her, will never try the operation.

Sometimes, the question is not, am I a cynic, its am I cynical enough.

Art

----- Original Message -----
From: <mariss92705@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Tuesday, May 29, 2001 6:53 PM
Subject: [CAD_CAM_EDM_DRO] Re: Stepper Dissasembly


> Art,
>
> Actually I didn't charge him. I felt sorry for him; he was up against
> a deadline, was on a tight budget and hadn't used the drives before.
> In all cases the exact same MOSET half-bridge pair had blown and the
> drives were repairable.
>
> I did suggest to him that if persisted with his particular set of
> trouble-shooting skills without modification, he should apply as a
> quality control inspector at a match company, (Yep, that one lights,
> next...).
>
> Mariss
>
> --- In CAD_CAM_EDM_DRO@y..., "Art Fenerty" <fenerty@h...> wrote:
> > Marris:
> >
> > True, I understand your point of view. But lets face it, it
> wouldn't
> > have hurt this guy to apply a voltage and just see what current the
> windings
> > sucked. No inductance bridge required. There's usually another way.
> Being in
> > electronics is like being a machinist, it's all about the little
> tricks you
> > learn. I wouldn't take apart a stepper in the RF drive of a Magnetic
> > Resonance scanner, cuz I want reliability, but in a home CNC
> machine, I
> > wouldn't hesitate. (I hope you charged the gut for the stepper
> drives. )
> >
> > Art
>
>
>
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