Homebrew PCBs

>>>>> "scratch" == scratch 6057 <dml.empsrch@...> writes:

> Two things that can help with what you are attempting to do, 
> select "drc" (Design Rules Check) then click the "Restring" Tab, 
> Under PADS Top & Bottom, change the % (percentage) to a larger 
> number, then click "Apply" button. 

> I would suggest that you save your file under some sort of alternate 
> file name before testing these procedures. 

> ( Extracted text from the Eagle "Help.Pdf" file )

> Restring
> The Restring tab defines the width of the copper ring that has to 
> remain after the pad or via has been drilled. Values are defined in 
> percent of the drill diameter and there can be an absolute minimum 
> and maximum limit. Restrings for pads can be different for the top, 
> bottom and inner layers, while for vias they can be different for the 
> outer and inner layers. If the actual diameter of a pad (as defined 
> in the library) or a via would result in a larger restring, that 
> value will be used in the outer layers. Pads in library packages 
> usually have their diameter set to 0, so that the restring will be
> derived entirely from the drill diameter.

> ( End extracted "Help.Pdf" text )

> The second item is as follows, if you don't have these files they can 
> be downloaded from the Cadsoft website and saved in 
> your "X:\\\Eagle\ulp" directory. 

>> From the command line in the Board layout window "Run drill-aid.ulp"

> Open the files with a TEXT Editor and read the headers . . .

> drill-aid.ulp
> Limit drill diameter of pads, vias and holes for easier manual 
> drilling. Draws small circles in layer 116 inside the drilling of 
> pads, vias and  holes, which should make it easier to center the tool 
> while drilling the board manually.

> drill-aid-delete.ulp
> Allows selective removal of circles in layer 116 inside the drilling 
> of pads.

Many thanks.
I was unable to manipulate the drill hole size with the restring. changing
the percentage seemed to only enlarge the pad itself. The drill-aid.ulp
however did exactly what I wanted so I am now a happy chappy.

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