SLA7062 and Re: New Article Posted

Hi Ballendo,
As you know, I breifly had a unipolar kit as well. Strangely
enough, probably half of them were sold *outside* the USA (it
seems). That means going to the Post Office and standing in line
quite a bit.

Anyway, I also started getting people 'popping' the chips. Almost
always it was due to a short circuit (usually a wire, but once I
think it was actaully the proverbial screwdriver). I also offered
replacement chips at the time, for $12.50 (IIRC). I don't think
Daves $15.00 is outrageous at all (as some thought). For the price
of his kit, getting a replacement for $15.00 should be considered a
fair deal.

And definitely, you never know what some one is going to do with a
self assembly kit. Even the assembled and test components I sell
get abuse from eager, enthusiastic, CNCers. Stuf (is that the
correct 4 letter word spelling!?!) happens!

Your box and Dave's board are at the complete opposite ends of the
spectrum as far as what bad things can happen to them. From total
open, to almost isolated. You'll have better luck as far
as 'popping' is concerned.

Yes, most everything will 'pop'. Things that might make a 3977 pop
might not make a 7062 pop. Things that might make a 7062 might not
make a gecko pop. Things that might make a gecko pop, well, you get
the picture. The question arises as to how much extra robustness is
really necessary or required to be built in, and at what cost?

Jeff
PS. If I were a betting man, I'd bet you'll be modifying that list
of things that are covered under "your fault" :-)

-- In CAD_CAM_EDM_DRO@yahoogroups.com, "ballendo" <ballendo@...>
wrote:

>
> >In CCED, "jeffalanp" <xylotex@> wrote:
> >So it would appear that the SLA7062 is perhaps not as robust as

has

> >been previously suggested. I guess they do go 'pop' as well, if
> >they are abused, similar to an abused A3977SED.
>
> Sure. I'd guess anything abused will "pop" at some point.
>
> The issue IMO is what constitutes "abuse", and more importantly
> where that level which constitutes abuse falls within
> what's "typical" for the user to do, and have.
>
> As I mentioned, I didn't know that HCNC boards were frying chips

and

> traces until yesterday. (AND I understand that HCNC is dealing

with

> the issues of a user-built product; so I'll cut GENEROUS slack for
> that!)
>
> We haven't had any pops except those which we purposely tested to
> destruction during product development and evaluation.
>
> When you sell to users who are not electronics savvy, you have to
> factor in for the inevitable errors in construction and

application.

> Unless you take that out of the equation by not selling user-built
> electronics. That's why we don't offer electronic "kits". Or bare
> boards.
>
> As long as you don't unplug the supplied or approved motors while
> under power, and use a proper A/C line supply; if ours pop, it's

our

> fault. We'll fix them.
>
> Probably by just sending out a new box; so you're up and running
> again as quickly as possible. We DEFINITELY will want that old box
> back to see if we can determine what happened... To improve the
> product and increase satisfaction for subsequent customers.
>
> So far, no pops. Just plug and use.
>
> Ballendo
> CNCresource support
>