Homebrew PCBs

Hi guys,

I am oh-so close to running some real boards on my CNC mill.  Having 
never done isolation milling I am not sure of what the process is, or 
is not capable of.  

I bought a couple carbide 'V' cutters and will be giving it a try this 
comming week.  I suspect the 'V' type cutters would be better than 
trying to use a .010" or .020" diameter endmill.

Right now, with toner transfer, I can get fairly reliable results with 
traces down to .012".  Anyone have any idea what can be done with 
isolation milling?  Any suggestions, comments, advice, warnings, etc. 
would all be appreciated!

Chris

The best site is done by Scott Holmes.(Grab the outlines_gcode.ULP
on that page) See first link. He explains the process very well. You
draw your layout in Eagle and then run the Outlines_Gcode.ULP to get
the Gcode. Make sure you don't make you drawing upside down. When you
are drawing in Eagle you are looking down at the top of the board not
the back.

http://mynock.dhs.org/pcbmilling/

http://www.luberth.com/cstep/PCBtest.htm

   









--- In Homebrew_PCBs@yahoogroups.com, "lcdpublishing"
<lcdpublishing@...> wrote:

>
> Hi guys,
> 
> I am oh-so close to running some real boards on my CNC mill.  Having 
> never done isolation milling I am not sure of what the process is, or 
> is not capable of.  
> 
> I bought a couple carbide 'V' cutters and will be giving it a try this 
> comming week.  I suspect the 'V' type cutters would be better than 
> trying to use a .010" or .020" diameter endmill.
> 
> Right now, with toner transfer, I can get fairly reliable results with 
> traces down to .012".  Anyone have any idea what can be done with 
> isolation milling?  Any suggestions, comments, advice, warnings, etc. 
> would all be appreciated!
> 
> Chris
>

Hi,
what do you think of this demo board from LPKF, 0.1 mils !! 5 tracks 
between 2 IC pins !!
http://www.lpkf.com/images/1/713-muster-einseitige-leiterplatte.jpg
Regards
Jacques


--- In Homebrew_PCBs@yahoogroups.com, "lcdpublishing" 
<lcdpublishing@...> wrote:
>
> Hi guys,
> 
> I am oh-so close to running some real boards on my CNC mill.  
Having 
> never done isolation milling I am not sure of what the process is, 
or 
> is not capable of.  
> 
> I bought a couple carbide 'V' cutters and will be giving it a try 
this 
> comming week.  I suspect the 'V' type cutters would be better than 
> trying to use a .010" or .020" diameter endmill.
> 
> Right now, with toner transfer, I can get fairly reliable results 
with 
> traces down to .012".  Anyone have any idea what can be done with 
> isolation milling?  Any suggestions, comments, advice, warnings, 
etc. 

> would all be appreciated!
> 
> Chris
>

Jacques, that looks fantastic to me!!!!  What type and size of 
cutter did you use to make that board?

Thanks

Chris


--- In Homebrew_PCBs@yahoogroups.com, "jme87be" 
<jacques.meunier@...> wrote:
>
> Hi,
> what do you think of this demo board from LPKF, 0.1 mils !! 5 
tracks 
> between 2 IC pins !!
> http://www.lpkf.com/images/1/713-muster-einseitige-leiterplatte.jpg
> Regards
> Jacques
> 
> 
> --- In Homebrew_PCBs@yahoogroups.com, "lcdpublishing" 
> <lcdpublishing@> wrote:
> >
> > Hi guys,
> > 
> > I am oh-so close to running some real boards on my CNC mill.  
> Having 
> > never done isolation milling I am not sure of what the process 
is, 
> or 
> > is not capable of.  
> > 
> > I bought a couple carbide 'V' cutters and will be giving it a 
try 
> this 
> > comming week.  I suspect the 'V' type cutters would be better 
than 
> > trying to use a .010" or .020" diameter endmill.
> > 
> > Right now, with toner transfer, I can get fairly reliable 
results 
> with 
> > traces down to .012".  Anyone have any idea what can be done 
with 

> > isolation milling?  Any suggestions, comments, advice, warnings, 
> etc. 
> > would all be appreciated!
> > 
> > Chris
> >
>

Chris,
it is a DEMO board from a manufacturer of very professional milling 
machines. It is only a dream for me !!
You may download a very instructive PDF there :
http://www.lpkf.com/others/1/1026-product-catalog.pdf

Jacques

--- In Homebrew_PCBs@yahoogroups.com, "lcdpublishing" 
<lcdpublishing@...> wrote:
>
> Jacques, that looks fantastic to me!!!!  What type and size of 
> cutter did you use to make that board?
> 
> Thanks
> 
> Chris
> 
> 
> --- In Homebrew_PCBs@yahoogroups.com, "jme87be" 
> <jacques.meunier@> wrote:
> >
> > Hi,
> > what do you think of this demo board from LPKF, 0.1 mils !! 5 
> tracks 
> > between 2 IC pins !!
> > http://www.lpkf.com/images/1/713-muster-einseitige-
leiterplatte.jpg
> > Regards
> > Jacques