Ken,

It's been a while since I played the drill format game.  But 2.4 format
refers
to the decimal placement of the coordinate.  2 digits before the decimal
and
4 digits after the decimal.  Leading zeros refers to leading zeros
suppressed.
So, the format allows the maximum number 99.9999 any coordinate less than
10 would be written with the leading zero suppressed for example 9.2555
would be written as 92555.  Note:  this format is used so no decimal point
is required, way back when NC drill machines and routers did not like
decimal points.

The anwer to the format you should use is the same format that your gerber
data is in.  Therefore if you gerber data is in a 2.3 format than use drill
2.3.  However one
suggestion if you are designing very dense circuitry 2.4 format should be
used.


John Haman Jr.


----------
> From: Ken Patel <[log in to unmask]>
> To: [log in to unmask]
> Subject: [TN] Drill format question
> Date: Thursday, March 26, 1998 5:34 PM
>
> Our layout house deliverables state following line.
>
> "Drill file in ASCII format leading zeroes, format 2.4 EOB LF/CR " . I
have
> couple of questions in that regards.
>
> (1)Can someone explain me what is "format leading zeroes, format 2.4 EOB
LF/CR"?
>
> (2) After talking to my layout house, one of the comment I received was
that
> instead of specifying leading zeroes, format 2.4 EOB LF/CR, it will be
> better to specify ___format in read me file - meaning layout house can
use
> of their own e.g. 3 instead of 4.
>
> As I do not have expertise, I would like to get feed back from you before
I
> change it.
>
> re,
> ken patel
> ______________________________________________________
> Ken Patel                       Phone:  (408) 490-6804
> 1708 McCarthy Blvd.             Fax:    (408) 490-6859
> Milpitas, CA 95035              Beeper: (888) 769-1808
>
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