Homebrew PCBs

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]
>>
>>
>>
>
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> [Non-text portions of this message have been removed]
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