On 11/1/22 16:58, andy pugh wrote:
On Tue, 1 Nov 2022 at 21:23, John Dammeyer <jo...@autoartisans.com> wrote:
Anyway. Does anyone know of a Protel 99SE drill file conversion program
to G-Code for CNC?
I found this: https://github.com/DJ027X/drl2ngc
But looking at the code I am not sure it copes with lines that have a Y
coordinate but no X coordinate.
Since drill files were often sent to the CNC drill on paper
tape, terse coding was pretty important. So, any axis that
didn't change from one hole to the next was omitted, the
decimal point was omitted, and trailing zeroes were
suppressed. This was the standard "Excellon drill format",
which actually was a dialect of RS-274D. I have sent John
D. my Pascal program that does the conversion. It also
compensates for the extra depth that needs to be drilled for
the flank of the drill to make it through the bottom of the
board, based on drill diameter. And, it also calculates the
best feedrate depending on drill diameter.
Jon
_______________________________________________
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users
