Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "Kevin Morgan" <prizes@...> wrote:
>
> Guys,
> 
> I do think a DIY CNC kit for under $500 is certainly possible. I 
> think I have under $300 in materials in my home built setup, 
> including stepper motors and DIY controllers. It is similar to the 
> ones that John Kleinbauer sells plans for.
> 
> I haven't seen anything like that so far though.
> 
> Kevin


To point out the costs,  you can make a frame for under $50 and put in
rails of some sort or anther for, maybe $50 to $75.  motors for $30 ?
a hobbyCNC driver kit for $80 and a power supply for maybe $100.00. 
Figure in the neighborhood of $50 to $75 for all the shipping from
each of the suppliers.  $5 here and $10 there adds up quickly.

Add wires and switches and all that and you are in the $450 range if
you can get the parts.  if you have to spend more, the price goes up,
if you have a well stocked surplus bin, the price goes down.

We figure that with our time and such, we need to make some sort of
profit.  I'd like to make about $10,000 on each machine, but alas, we
are not selling golden machines.

We figure it will take a few days to make a machine for us.  a couple
weeks if you design and build your own.

So, we came up with a target price that was only a couple hundred more
than the cost of what you could scrape things together for.

I did offer a group buy for the SLA7078mpr chips on another list. it
looks like they would be about $6.80 per, and $4.05 for Priority mail
or $24.40 for three.  I need to order 144 to meet the minimum order,
and once this is done, I would either sell them for $8 ea or just use
them for the new machines.

There is it.  we are doing this in the basement and garage.   we do
not have a shop or factory, so we do expect some things to change.  We
also do not have a ton of start-up money, so we are doing it on the cheap.

I figure all of you have or are doing your stuff in a similar way at
some point.

Thanks for listening.

Dave