[blackice]

hi guys, i am back to pick your collective brains......i am new to all this and i wanted to get to grips with the mysterious art of G code and how it works and how to use it. Do you lads have any advce on books etc that would be a starting point in learning G code?
thanks in advance to any and all replies

[sinha_nsit]

Join some commercial training course on CNC programming, for a steeper learning curve. Reading a book with absolutely no background would need tremendous patience and attention.

[Ron Dunn]

Peter Smid's books are great references:

[ame=http://www.amazon.com/Peter-Smid/e/B001IU4QEM]Amazon.com: Peter Smid: Books, Biography, Blog, Audiobooks, Kindle[/ame]

I have the first two books, they're well written, but I think they're more suitable to a professional in the field than a hobbyist CNC user.

Frankly, since I bought VCarve, I've not written a single line of g-code.

[doorknob]

How about:

http://www.linuxcnc.org/handbook/RS2...RS274NGC_3.pdf

[blackice]

guys, thanks a million for your replies, this is the best forum site i have ever been on. Always direct and intelligent replies, and no condecending to the less experienced of us on this subject:cheers:

will try your suggestions ont he books given, course on the subject are not readil or easily available on the subject here in Ireland

[Erichu10]

Thank you Doorknob!

[ksc]

Peter Smid's books are great if you have a background in machining, pretty easy to read too.

[joegallagher]

G code is like riding a bike , become the tool, sit at the tip of the tool and start to remove the unwanted material a little at a time. remember to rough first, simi finish and then finish. a lathe program would look like this
G code starts pretty basic. includes starting the motor (M03 foward M04 Reverse)
setting a Rpm (G96 S1000 constant surface speed), setting speed parameters ( g94 or g95 ) setting a max RPM ( G50 S 900) turning on the Coolant ( m08) calling up the required Tool Number and the required tool number offset ( T0101 od face and turn CMNG 432 ) them its go time G00 X CLEARANCE POSITION G00 Z CLEARANCE POSITION
( CLOSE TO THE OD AND FACE OF THE MATERIAL ABOUT .100 IN BOTH DIRECTIONS)
Face off moves require a G01 and a feed rate (.005 ) ( G01 X -.032 F.005: then retract from the face of the material proir to returning to the next cut (G00 W.005:this is a assolute code move ) following is what a face off code would look like:remember to set the tool geometry in the machine registry both in X and in Z )
% (required Syntax)
( Program number)
G0 G96 S500 M03 T0101:
X 1.025 Z .01 :
M8: (coolant on)
G1 Z0 F.01:
X-.032 F.005:
G0 W.01: ( absolute move)
X1.025:
M9 (coolant off)
M5 (Motor Stop)
M30 (rewind program)
% (required syntax)

hope this is of some help
luck
joe

[Al_The_Man]

This may help also.
CncSimulator.com
Al.

[tanvon]

You can check my cnc blog tanvon | the way I go I just try to post simple to complex programming examples as well as other cnc related material