G Code info

[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:

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

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

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