Help with Gcode

[xairflyer]

I have just about figured out the basics of using this Gcode and have successfully managed to draw something in Autocad, convert it with ACE, then edit the code to the way I want it.

What I want to find out is regarding feed rates, can I set a master feed rate that all lines will follow except ones that contain a different feed rate ?

i.e. If I want all the x,y cutting to be done at F150 but only want to plunge into holes at F40 if I have a line say G01 Z -0.5 F40 and my next line is a X,Y co ord will it also cut at F40 or can I get it to use to the master F150 without having to type it into every line.

Also if you have lines of commands without N numbers how do you add the numbers without having to click in front of each line and manually type it in.

[miljnor]

I don't know autocad or ACE so I cant answer the second question with any certainty but most programs have a switch to turn the N numbers on and off. If yours dosn't then you got to type them in. Personaly I would have them on every line, as it makes the program slighty harder to read. And I believe it takes up more memory (which is only a facter on commercial machines with onboard memory and only with very large programs, like molds).


the Feed rate has to be changed every time you want it to change. Its a modal command and will stay in effect until it is changed again. Unless the machine control your using is different then just about every control I have ever used.

[ger21]

You don't have to use line numbers. I think the demo version of KCAM can add them, if you really need them.

Like Miljnor said, any time you have an Fx.xx, it will stay in effect until another one is used.

You might want to try my AutoCAD macro to export g-code from AutoCAD. You can specify both plunge feeds and normal feeds, and you shouldn't have to edit the code it creates. Won't work in LT, needs full AutoCAD, 2002 and above (maybe 2000). http://www.cnczone.com/forums/showthread.php?t=8226