Homebrew PCBs

Hi Derek,

Great pictorial!  I have two questions...

1) What is this product and where to get it 
       "self adhesive film "

2) I notice this is a servo control being built, can you share some 
details about this?  The reason I ask is that I am about to convert 
a machine over to CNC using servos. I have not yet purchased the 
servo drivers yet, so I am curious.

Chris







-- In Homebrew_PCBs@yahoogroups.com, "derekhawkins" 
<derekhawkins@y...> wrote:
> Most of us are probably using CAD software to design our PCBs but 
if 
> you're still scribing patterns for drilling and cutouts directly
> to metal during case construction then you should consider 
creating 
> CAD templates, printing and pasting them to the metal instead. 
Even 
> if you don't intend using a CNC setup, these templates make things
> more accurate for component placement and allow for efficient 
> repeatability in case of screw ups. Also, the same template can be 
> used as the basis for a dimensionally accurate "decorative"
> finish.
> 
> Freeware PCB CAD software abounds and while they may be 
intentionally 
> limited when it comes to actual PCB design, generally, there is no 
> limitation when used for something like case design if you choose 
the 
> right one. In other words, provided devices such as pads 
and "known" 
> components are not being used, your design can be any size.
> 
> The link below is a set of pictures demonstrating the use of CAD 
> software and printed templates to CNC drill and center drill 
> (equivalent to center punching but under CNC) a 12" X 6"
> sheet of aluminum that becomes the front, back and base of the 
case. 
> Holes over 1/8" were drilled manually after center drilling.
> Cutouts were nibbled using templates as bounds. Finally, a 
decorative 
> finish printed on self adhesive film was then used for the front 
and 
> back.
> 
> http://www.pbase.com/eldata/caseconc