Homebrew PCBs

Thanks Joe!

I believe that's a 30 degree engraving bit (I only have 30 and 60 degree
bits atm)

Jamie
Check out my CNC projects (and more) at http://www.backyardworkshop.com



On Thu, Dec 13, 2012 at 10:39 AM, joe M <joe9mail@...> wrote:

> **
>
>
> Hello Jamie,
>
> Those are some good looking pens.
>
> That seems to be a pretty sharp bit. What bits did you use?
>
> Thanks
> Joe
>
>
> On Thu, Dec 13, 2012 at 9:15 AM, Jamie Cunningham
> <jamie@...> wrote:
> > hey Joe - I milled a pcb using my homemade CNC machine - I actually used
> > double sided tape to hold it down and probably went a little too deep
> with
> > the bit (although it all worked)
> >
> >
> http://www.backyardworkshop.com/blog-posts/most-recent/176-milling-a-circuit-board.html
> >
> > Jamie
> >
> > Jamie
> > Check out my CNC projects (and more) at http://www.backyardworkshop.com
> >
> >
> >
> > On Thu, Dec 13, 2012 at 9:01 AM, joe M <joe9mail@...> wrote:
> >
> >> **
>
> >>
> >>
> >> Hello,
> >>
> >> I am trying to mill the pcb (FR4) with a taig.
> >>
> >> I did not have much luck with a uniform trace isolation even when I hold
> >> the board flat down by clamping down on the board edges. It appears that
> >> the pcb surface might not be uniform and that might be the reason why I
> >> cannot remove/mill out the copper layer consistently. I read about
> using a
> >> foot (http://hackaday.com/2011/04/22/pcb-milling-tutorial/) to push the
> >> pcb
> >> down while milling, but, that was a bit too much for my skill level.
> >>
> >> I read somewhere that it is easier to just paint the whole circuit board
> >> with some paint and then remove/scribe the paint off wherever the traces
> >> were being milled. This process is described here:
> >> http://reprap.org/wiki/Scratch_n%27_Etch_PCBs . Just wanted to check if
> >> anyone has experience with this?
> >>
> >> On a different note, I read that "paper phenolic" boards are
> better/easier
> >> on the mill and drill bits. I checked digikey and mouser and could not
> come
> >> up with any "paper phenolic" boards. Wondering if anyone knows of a
> >> supplier for "paper phenolic" boards?
> >>
> >> I used the EM2E8-0625-90VC bit from
> >> http://www.precisebits.com/products/carbidebits/scoreengrave.asp to
> mill
> >> the board. Maybe, I need to use a 45 degree bit as noted in this
> article:
> >>
> >>
> http://millpcbs.com/index.php?option=com_content&view=article&id=23&Itemid=47
> >>
> >> Any thoughts or advice, please?
> >>
> >> Thanks
> >> Joe
> >>
> >> [Non-text portions of this message have been removed]
> >>
> >>
> >>
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> > ------------------------------------
>
> >
> > Be sure to visit the group home and check for new Links, Files, and
> Photos:
> > http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> >
> >
> >
>
>  
>


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