Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "lcdpublishing" 
<lcdpublishing@y...> wrote:
> ANdrew,
> 
> Sorry if this has already been asked/covered, but are you using
these 
> drills on a CNC machine?  If so, does that machine have tool length 
> offsets?
> 
> If so, wouldn't it be easier to measure the tool length and change 
the 
> offset than to change the physical length of the tool to match the 
> offset?
> 
> I am just starting to tinker with PCBs on my CNC router so I am
just 
> trying to grasp the overall process that others are doing with PCBs 
> and CNC machines.
> 
> Chris

Chris,

Yes it's a Bridgeport Interact 1 using a Heidenhain TNC151 controller 
(1987 vintage), and although tool offsets can easily be set at the
time 
the code is generated they cannot be set 'on the fly' for programs 
longer than the memory can hold, which have to be 'drip fed', it's
also 
a problem when a drill breaks and another has to be inserted 
having 'paused'.

AWEM