Homebrew PCBs

I'm a quality inspector at an electronics company, and I use a brand new
X-acto blade to remove traces when the assembly guys miss them.  We have
boards laid out for multiple products and you remove certain traces
depending on what product you are building.  For that we make three or four
passes with the knife so as not cut into the board on both sides, then
carefully peel the trace up from the middle between the cuts using the knife
on the edge, again so it doesn't damage the FR4.  Usually it is succesful
without it being obvious of what we did.  Dremels ALWAYS marr the board,
beacuse noone has a hand steady enough for the vibrating motor.

Mind you we do this for very few, but still production boards.

On Fri, Apr 16, 2010 at 6:12 PM, Henry Liu <henryjliu@...> wrote:

> I use a dental pick under a nikon stereo microscope.  It makes like magic
> and gives a lot more precision easily breaking tracks.
>
> Same idea for removing tartar at the dentist I guess.
>
> On Fri, Apr 16, 2010 at 3:05 PM, James <jamesrsweet@...> wrote:
>
> >
> >
> >
> >
> > --- In Homebrew_PCBs@yahoogroups.com <Homebrew_PCBs%40yahoogroups.com>,
> > Chris Maness <chris@...> wrote:
> > >
> > > I just noticed that one of my lands over laps a trace. What is the best
> > way
> > > of fixing this without having to re-do the whole board? Is the xacto
> > knife
> > > my only option?
> > >
> > > Chris KQ6UP
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
> > I use a utility knife with a nice sharp blade. Usually I try to dig in a
> > little with the point and then peel back a bit of trace to make sure it's
> > open. Be careful to hold things so that if the knife slips you don't lose
> > part of a finger.
> >
> > I've tried a Dremel as well, but found that it's far too easy for the
> > cutter to catch and walk around, gouging all sorts of stuff you didn't
> > intend.
> >
> >
> >
>
>
> [Non-text portions of this message have been removed]
>
>
>
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>
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-- 

-Dave.


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