Re: Group Buy Group Design Group Controller

It does make sense to try to reduce the cost of the parts we all use.

I'm making a breakout board. it will cost about $30.00 in parts,
including about $11.00 for relays and close to $13.00 just for the
removable terminal strips.

The board will be $21.00 each for the first 3 (ExpressPCB) then about
$5.00 a board.

So, for a SIMPLE project it is easy to hit $40.00 per board. Add
high quality components, assembley costs, troubleshooting and
shipping and $50.00 per board is pretty easy to hit.

For a kit that will have limitations in performance the 'kit' market
there, but I for one would still long for a 'real' driver.

Compare a Xylotex for around $40.00 per channel (including shipping
and connector) and you have a tough target to beat. once you start
getting into the high amp stuff, the $125.00 for a Gecko can be
beaten easily, but you would have a long way to go to make it cost
effective.

And you have a driver someone talked about last week that was in
between those prices, it seems the market is covered.

There already is a guy who posted a open source schematic on this
list some 6 months ago. Mostly for those in countries where the VAT
makes even a dollar cost more than a dollar. I have not heard one
person post that he installed and is running it though.

I would be very interested in looking at the project, but unless it
offered more performance or reduced price it would be a hard sell.

just my $0.02

Dave










--- In CAD_CAM_EDM_DRO@yahoogroups.com, "yah67890 <yah67890@y...>"
<yah67890@y...> wrote:

>
> Here is the idea, A modular Contoller for one axis .
>
> 1 : The Problem everbody needs different controllers for different
> motors,power,type.
> 2 : Everybody wants to be able fit larger motors as more surplus
> become available.
> 3 : A universal board.
> If you don`t need high power links bypass the output drivers
> (transistors "not installed")
> If you don`t needed optoisolation links bypass it (not installed).
> So the board would be physically bigger than some need, Now!! but
> at any time a change of links,psu would have it driving a new motor.
>
> 4 : The more axis you need, the more you buy, each motor could be a
> different size.
>
> 5 : Each year the motors are going to be bigger and cheaper.
>
> 6 : The next garage sale you go to you don`t know what type,how

many

> leeds,etc only onething the price you must buy it.
>
> With all the users and suppliers on the board i`m sure a suitable
> design could be made.
>
> 7 : I understand a lot of the problems to be faced, but !!. :}
>
> For your consideration
> Thanks Yah
>
>
>
>
>
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> http://www.kanabco.com/virtual/VMS/lessons/library1.html