Homebrew PCBs

I've got my eye on them also.

If you check the chart, the price is the same for 10 day lead time as well;
50% reduction in waiting.  7 day is only $20 more, it's at 5 days that it
starts getting much more expensive.

I used the same technique selecting CPUs for my new PCs; start at the
bottom, and work my way up until I hit a big price hike, then I take the CPU
just before the hike.

I have 3 SP57B steppers waiting on the shelf.  I've got an assortment of
threaded rods from 3/8" up to 1/2" with 2" long nuts.  I was planning on
fixing 2 of these long nuts onto the slides and passing the threaded rod
through.  By using 2 nuts, I get most of the play out.

I'd love to see pics on DIY CNC drilling stations.  I've got most of the
stuff figured out now, I just need to plug a few holes in my design.  One
last place I have to go see is a local ball bearing shop to get several
units of various sizes.

Then I have to address alignment; how to get it all perfect (or close to).
Even making a flat surface is not that easy when you talk 1/1000s of an
inch.  Adding a gantry and the sliding motor platform is more variables.  I
really want to make one, but I'm not making it unless I can address
alignment properly.  I might as well use my small vertical drill if my CNC
station is not aligned right.

Robert
:)


-----Message d'origine-----
De : Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] De
la part de Alan King
Envoyé : mai 29 2005 21:01
À : Homebrew_PCBs@yahoogroups.com
Objet : Re: RE : [Homebrew_PCBs] Re: Minor production run?


Alan King wrote:


> 
>    When I find a decent place that does a reasonable flat rate or at 
> least a
> much more reasonable per board extra I'll post it here..
> 


http://www.pcb4less.com/

  PROTOTYPE & PRODUCTION PRICE TABLE - UNIT PRICE
Quantity 	20 Day 	15 Day 	10 Day 	7 Day 	5 Day 	4 Day 	3 Day	2
Day
25  	$6.73  	$6.73  	$6.73  	$6.73  	$8.15  	$9.57  	$10.99
$12.76
50  	$4.30  	$4.56  	$4.56  	$4.81  	$5.82  	$6.83  	$7.85  	$9.11
100  	$3.79  	$3.79  	$3.79  	$4.01  	$5.12  	$6.01  	$6.90  	$8.02
250  	$3.18  	$3.18  	$3.18  	$3.37  	$4.31  	$5.05  	$5.62  	$6.18
500  	$2.92  	$2.92  	$2.92  	$3.09  	$3.95  	Call 	Call 	Call
1000  	$2.57  	$2.57  	$2.57  	$2.72  	Call 	Call 	Call 	Call
2500  	$2.02  	$2.16  	$2.30  	$2.43  	Call 	Call 	Call 	Call

  Tooling Charge = $100.00


   These guys are actually ok.  20 day lead, with $3.79 + $1 per for 100 is 
fairly good, looks the most reasonable that I've found so far.

   This is 4x4 board with 2 layers no mask etc..  Actually just tried, cost 
didn't change for mask and screen on both sides, that's not too bad at all.


   Click the guest button though, even after registering it wouldn't let me
log 
in for now..

Alan




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