Re: What is G-Code really? (Was Gerber to final PCB)

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "ghidera2000"
<ghidera2000@y...> wrote:

> I just finished a chat with a Gerber format expert and he's telling
> me that its not possible for G-Code to be 274-D because 274-D has

no

> aperature information in it. Only 274-X has enough information to
> actually mill a workpiece without a human operator to set the
> aperatures manually.
>
> Or is G-Code based on and extended from 274-D?

G code for programming CNC machines is RS-274D

Gerber is RS-274X, Extended gerber contains the aperture definitions
within the files. It cannot be used for CNC milling.

You must convert RS-274X(Gerber) to RS-274D (G-code), incorporating
tool geometry, size, depth of cut, feed, speed, and all the other
parameters that are required for a CNC program.

DeskPCB does this for properly formatted Gerber and Excellon files.

Your files which you posted on our web site Friday night, then
complained about here on Saturday are junk. The message that you
received is for an improper G-code in the Gerber files. It is a
warning only. If you pressed enter a couple times you would then see
the traces displayed on the screen. They can be isolation milled as
they are.

The Excellon file that you posted calls out a 350 mill diameter
drill. We suspect that it should be 035 instead, but maybe not.

Check your expert's credentials.

Fred Smith - IMService