G code programing in a Book

[andrewbishop66]

I now have my machine up and running on x and y and would like to start to understand g code ect I know some of it is easy to spot but I would like to be able to edit code ect can anyone suggest a book to start with I have programed before in Visal Basic
I,m in the uk but dont mind waiting for the right book

Thanks for any help

Andrew Bishop

[mrainey]

book
http://www.betatechnical.com

free online course
http://technology.calumet.purdue.edu/met/mfet/275/

books and CD's
http://www.cncci.com
http://home.columbus.rr.com/hputz/learningcncmill.html

[BlueChip]

KipwareEDU ... www.KentechInc.com

[lgreeves]

Some machine and/or software manuals have a section on programming the machine.

[pointcloud]

I would start with the book that came with my machine.
If it is a home built machine then start with the machine control software book. It's a good idea to understand what the machine wants to start.

G and M codes are easy if you understand where they go. The machine control book will give good examples of what to place where.

I would not spend any money until I understand what my machine wants.
After this you willl be suprised, books are not as machine specific just full of general info.
You might end up buying a book but between this site, and the machine control book you should be in Great shape.
A G and M code list is here on the site, but they will be different for a lot of machines.

I hope this helps, and saves some $..
Later...

[dertsap]

http://www.cncci.com/products/optional%20stop/spr05.htm


not much need to buy books , all the info you need is available free on the internet
a google search will come up with lots of stuff

[Switcher]

I now have my machine up and running on x and y and would like to start to understand g code ect I know some of it is easy to spot but I would like to be able to edit code ect can anyone suggest a book to start with I have programed before in Visal Basic
I,m in the uk but dont mind waiting for the right book

Thanks for any help

Andrew Bishop

I'll assume it's a diy cnc mill thats almost finished, since you said "X & Y" a didn't mention "Z".

I would start with a program like www.ncplot.com (or something similar), they have a free version & a 15-day trial version.

If you have worked with VB, consider yourself one step ahead of the game. Start working with things that are free (software trials, Google info.), then when you get up to speed, spend your money.

I like NcPlot, you can adjust the g-code all you want, & see the results very easily.

G-code is like any other programming language, you can write programs that are simple, or very complex.

G & M codes are just a list of instructions, not all controls are created equal, especially M-codes (Machine Code).

I think we could help you better, If we knew what control you are running (Mach3, etc...).




.

[andrewbishop66]

Sorry should have made that more clear Bridgeport clone Mach 3 I can draw simple things in Auto Cad use lazy cam to do the g code file but I like to understand what I,m seeing in code so that if I wish I can edit it

thanks some of the links so far have been a help

Andrew

[pointcloud]

Post a code and I will show you what each thing does? then you will get it a little better...

Look it is not hard there are only so many G's and M's, and a few more letters but post it and we will go from there...

[andrewbishop66]

here are two done on wizzards the first a drilling hole pattern the second cutting a circle I would like with practice be able to merge two files like this add stops for manual tool changes and small alterations


(Program Posted for Steel Hard )
G0 G49 G40.1 G17
G80 G50 G90 G98
G21 (mm)
(***** Circular Hole Pattern *****)
M6 T4
M03 S242.6
M8 (Flood On)
G00 G43 H4 Z100
G81 X110 Y60 Z-5 R0.125 F12.7
X103.3013 Y85
X85 Y103.3013
X60 Y110
X35 Y103.3013
X16.6987 Y85
X10 Y60
X16.6987 Y35
X35 Y16.6987
X60 Y10
X85 Y16.6987
X103.3013 Y35
G80
M5 M9
M30



(Program Posted for Steel Hard )
G0 G49 G40.1 G17
G80 G50 G90 G98
G21 (mm)
(***** Circular Groove/Cutout *****)
M6 T4
M03 S242.6
M8 (Flood On)
G00G43 H4 Z0.1
G00 X131.5 Y65.75
G01 Z-1 F1.25
G41 P5
G01 X125.75 F2.5
G03 X120 Y60 R5.75
G02 X0 Y60 R60
X120 Y60 R60
G03 X125.75 Y54.25 R5.75
G40
G00 Z0.1
G00 X131.5 Y65.75
G01 Z-2 F1.25
G41 P5
G01 X125.75 F2.5
G03 X120 Y60 R5.75
G02 X0 Y60 R60
X120 Y60 R60
G03 X125.75 Y54.25 R5.75
G40
G00 Z0.1
G00 X131.5 Y65.75
G01 Z-3 F1.25
G41 P5
G01 X125.75 F2.5
G03 X120 Y60 R5.75
G02 X0 Y60 R60
X120 Y60 R60
G03 X125.75 Y54.25 R5.75
G40
G00 Z0.1
G00 X131.5 Y65.75
G01 Z-4 F1.25
G41 P5
G01 X125.75 F2.5
G03 X120 Y60 R5.75
G02 X0 Y60 R60
X120 Y60 R60
G03 X125.75 Y54.25 R5.75
G40
G00 Z0.1
M5 M9
M30


thanks for the help

[pointcloud]

Not much there... Tell me what you are doing and I will make you something to look at.

You got to many G's tool comp off to many times and things like that.

I would like for you to search MODAL on here the cnczone.
Then Search circle G02 and G03.

Go ahead and reply, I'll check back tonight and get you started tomorrow. I can make you a code in the morning pretty quick.
You got the right idea just a little much for someone just starting.
Later.

[pointcloud]

Ok this is better with one little problem. Your groove cuts the entire time... You need it to come up then to the circle then into the material.

N1 (Program Posted for Steel Hard )
N11 G0 G49 G40.1 G17
N21 G80 G71 G50 G90 G98
N31 G21 (mm)
N41 (***** Circular Hole Pattern *****)
N51 M6 T4
N61 M03 S242.6
N71 M8 (Flood On)
N81 G00 G43 H4 Z1.00
N91 G81 X110. Y60. Z-5. R0.125 F12.7
N101 X103.3013 Y85.
N111 X85. Y103.3013
N121 X60. Y110.
N131 X35. Y103.3013
N141 X16.6987 Y85.
N151 X10. Y60.
N161 X16.6987 Y35.
N171 X35. Y16.6987
N181 X60. Y10.
N191 X85. Y16.6987
N201 X103.3013 Y35.
N211 G80
N221 M5 M9
N231 M30
N271 (Program Posted for Steel Hard )
N281 G0 G49 G40.1 G17
N291 G80 G71 G50 G90 G98
N301 G21 (mm)
N311 (***** Circular Groove/Cutout *****)
N321 M6 T4
N331 M03 S242.6
N341 M8 (Flood On)
N342 G43 H4
N351 G00 Z0.1
N361 G00 X131.5 Y65.75
N371 G01 Z-1. F1.25
N381 G41 P5
N391 G01 X125.75 F2.5
N401 G03 X120. Y60. R5.75
N411 G02 X0. Y60. R60.
N421 X120. Y60. R60.
N431 G03 X125.75 Y54.25 R5.75
N441 G40
N451 G00 Z0.1
N461 G00 X131.5 Y65.75
N471 G01 Z-2 F1.25
N481 G41 P5
N491 G01 X125.75 F2.5
N501 G03 X120. Y60. R5.75
N511 G02 X0. Y60. R60.
N521 X120. Y60. R60.
N531 G03 X125.75 Y54.25 R5.75
N541 G40
N551 G00 Z0.1
N561 G00 X131.5 Y65.75
N571 G01 Z-3. F1.25
N581 G41 P5
N591 G01 X125.75 F2.5
N601 G03 X120. Y60. R5.75
N611 G02 X0. Y60. R60.
N621 X120. Y60. R60.
N631 G03 X125.75 Y54.25 R5.75
N641 G40
N651 G00 Z0.1
N661 G00 X131.5 Y65.75
N671 G01 Z-4 F1.25
N681 G41 P5
N691 G01 X125.75 F2.5
N701 G03 X120. Y60. R5.75
N711 G02 X0. Y60. R60.
N721 X120. Y60. R60.
N731 G03 X125.75 Y54.25 R5.75
N741 G40
N751 G00 Z0.1
N761 M5 M9
N771 M30
N781

Screen shot is both combined.

I like line numbers (notice lines by 10 starting w/1 this leaves room for changes) and you needed to tell it Inch or Metric I put G71 (metric/mm) also you needed decimals.(well ncplot did)