Finding tool location

On 7/6/12 3:22 PM, John Friede wrote:

I am trying to track down an odd-ball drill size on my pcb.  It is

referenced as:

 

T03

X33810Y21006

 

I can not find in the eagle.def file which format the coordinates are in

(eg 2.4).  Assuming that Eagle is 2.4 LZ from looking at old posts, that

would tell me the drill hole should be at 3.3810, 2.1006.  When I go

there though there is no hole.  What am I missing?  BTW, I have no

offset defined in the CAM processor job.  I have included the EXCELLON

info from eagle.def below:

I'd load the file up in a Gerber viewer (GC-Prevue, gerbv, etc.) and

navigate to 3.38",2.1". You'll be able to see the relevant hole.

Even if you don't have offsets defined Eagle will add some in to make

sure everything is away from the origin and there are no negative numbers.

Andrew.

On 7/6/2012 3:49 PM, Andrew Sterian wrote:

On 7/6/12 3:22 PM, John Friede wrote:

>> I am trying to track down an odd-ball drill size on my pcb.  It is

>> referenced as:

>>

>> T03

>> X33810Y21006

>>

>> I can not find in the eagle.def file which format the coordinates are in

>> (eg 2.4).  Assuming that Eagle is 2.4 LZ from looking at old posts, that

>> would tell me the drill hole should be at 3.3810, 2.1006.  When I go

>> there though there is no hole.  What am I missing?  BTW, I have no

>> offset defined in the CAM processor job.  I have included the EXCELLON

>> info from eagle.def below:

 

I'd load the file up in a Gerber viewer (GC-Prevue, gerbv, etc.) and

navigate to 3.38",2.1". You'll be able to see the relevant hole.

 

Even if you don't have offsets defined Eagle will add some in to make

sure everything is away from the origin and there are no negative numbers.

 

Andrew.

Thanks!  I didn't realize Eagle added it's own offset in.  Looked at it

in Pentalogix and found it. How does Pentalogix know what the offset is?

On 7/6/12 6:19 PM, John Friede wrote:

On 7/6/2012 3:49 PM, Andrew Sterian wrote:

>> On 7/6/12 3:22 PM, John Friede wrote:

>>> I am trying to track down an odd-ball drill size on my pcb.  It is

>>> referenced as:

>>>

>>> T03

>>> X33810Y21006

>>>

>>> I can not find in the eagle.def file which format the coordinates are in

>>> (eg 2.4).  Assuming that Eagle is 2.4 LZ from looking at old posts, that

>>> would tell me the drill hole should be at 3.3810, 2.1006.  When I go

>>> there though there is no hole.  What am I missing?  BTW, I have no

>>> offset defined in the CAM processor job.  I have included the EXCELLON

>>> info from eagle.def below:

>>

>> I'd load the file up in a Gerber viewer (GC-Prevue, gerbv, etc.) and

>> navigate to 3.38",2.1". You'll be able to see the relevant hole.

>>

>> Even if you don't have offsets defined Eagle will add some in to make

>> sure everything is away from the origin and there are no negative numbers.

>>

>> Andrew.

Thanks!  I didn't realize Eagle added it's own offset in.  Looked at it

in Pentalogix and found it. How does Pentalogix know what the offset is?

 

It doesn't. But everything else on the board is offset too, so even

though the X,Y co-ordinates are unfamiliar to you relative to what they

are in Eagle, they are familiar when viewed relative to everything else

on the PCB, which has also been offset.

In other words, there is an offset between the Eagle PCB co-ordinates

and the Gerber file co-ordinates. You don't know what it is, but it

doesn't matter because the offset applies to everything.

Andrew.

On 7/6/12 6:19 PM, John Friede wrote:

On 7/6/2012 3:49 PM, Andrew Sterian wrote:

>> On 7/6/12 3:22 PM, John Friede wrote:

>>> I am trying to track down an odd-ball drill size on my pcb.  It is

>>> referenced as:

>>>

>>> T03

>>> X33810Y21006

>>>

>>> I can not find in the eagle.def file which format the coordinates are in

>>> (eg 2.4).  Assuming that Eagle is 2.4 LZ from looking at old posts, that

>>> would tell me the drill hole should be at 3.3810, 2.1006.  When I go

>>> there though there is no hole.  What am I missing?  BTW, I have no

>>> offset defined in the CAM processor job.  I have included the EXCELLON

>>> info from eagle.def below:

>>

>> I'd load the file up in a Gerber viewer (GC-Prevue, gerbv, etc.) and

>> navigate to 3.38",2.1". You'll be able to see the relevant hole.

>>

>> Even if you don't have offsets defined Eagle will add some in to make

>> sure everything is away from the origin and there are no negative numbers.

>>

>> Andrew.

Thanks!  I didn't realize Eagle added it's own offset in.  Looked at it

in Pentalogix and found it. How does Pentalogix know what the offset is?

 

It doesn't. But everything else on the board is offset too, so even

though the X,Y co-ordinates are unfamiliar to you relative to what they

are in Eagle, they are familiar when viewed relative to everything else

on the PCB, which has also been offset.

In other words, there is an offset between the Eagle PCB co-ordinates

and the Gerber file co-ordinates. You don't know what it is, but it

doesn't matter because the offset applies to everything.

Andrew.