Homebrew PCBs

Hi Mike,
        I am using the 60 degree bit from Think and Tinker. I mill
a little deeper than normal so my customers will have less problems
soldering the board. My new board has a few traces that go in between
the traces. Soon I will find out how that works out. 

                                        John



--- In Homebrew_PCBs@y..., "n4onl" <umrk@b...> wrote:
> --- In Homebrew_PCBs@y..., "crankorgan" <john@k...> wrote:
> > Hi Steve,
> >          I milled that one with a Brute. I orignally designed my
> > mills so people would have a machine to learn on. Someone asked
> > me if I could design a mill that would do circuit boards. My first
> > machines would mill, but the traces were not that good. It wasn't 
> the
> > threaded rod. It was my drive nut! The wider the drive nut the 
less
> > backlash. I now use 1/2" wide Delrin tapped with a good 1/4-20 
tap.
> > 
> >                                            John
> 
> Hi John, nice looking board!
> 
> Have you ever tried a smaller cutter and doing traces between DIP 
> pins?
> 
> I've also read that a longer nut will reduce backlash. Have you 
ever 
> tried one of the long nuts used to cnnect 2 pieces of all thread 
> togeather? Of course with a good tap in delrin your probably 
getting 
> most of the backlash out anyway. 
> 
> Another option is to split the nut in the direction of the rod (on 
> one side) and slightly pinch it to eliminate even more backlash. 
This 
> technique works better on standard threads than on Acme threads due 
> to the angle of the threads.
> 
> mike