Re: [CAD_CAM_EDM_DRO] LibreCad/.DXF to G-Code for CNC drill?

Hi,

Thanks to all for all the suggestions - all good learning.

I've found a Linux program that generates g-code for point ("bolt
hole") co-ordinates around a circle from the numbers you enter, in
accordance with the G83 - G80 'canned drill cycle' mentioned:
http://wiki.linuxcnc.org/uploads/boltcircle2.py

Since the "Python" code is text, I can modify it to my exact
requirements (eg, if the 'canned drill cycle' doesn't do what it's
supposed to I can modify the code generated). So I guess I too will
leave CAD packages for more convoluted things, and just string the
several sets of 9 holes (and a few other holes) together in g-code.

( Maybe I can finally get on with this motor tomorow! :) )

Cheers,
Craig

=====

>Craig Carmichael wrote:
> > Hi,
>>
>> Thanks Brian and Ron for your suggestions, but it looks like I'm not
>> there yet and am still looking.
>>
>> Brian, 'Dxf2gcode' says a "point" is an undefined geometric type, and
>> for circles, it wants to mill around the periphery rather than to go
>> at any time to the center where I could tell it to drill.
>>
>> So it looks like a great program for milling, but as far as I can
>> tell, it can't be used for drilling holes.
>>
>Well, I wrote some little C programs that read in a file of X, Y pairs
>and output
>useful G-code programs. One generates 3 files, to spot, drill through
>and tap
>the holes. You answer a few questions about depth and feedrate for each
>operation.
>If you are only drilling, for example, you just throw the extra files away.
>
>I also have a program to do regular grids of holes.
>
>So, I never use a CAD package for these simple tasks. The G-code is
>so simple you can write it yourself, too.
>
>Jon
>
>