Re: [CAD_CAM_EDM_DRO] interpretation needed: Gcode and Mcode experts

Lee Studley wrote:

>Hi,
>Are there any Gcode and Mcode experts who can explain this CAM
>produced line for me. I've added my best guess at it. It was from
>a generic fanuc postprocessor. Thanks in advance.
>
>N106G0G90G54X0.Y2.7969A0.S5000M93G4P2
>
>My attempted Dissection:
>N106 line number.
>G0 ??? no parms..If this is modal maybe it's saying the following are
>to be rapid until mode changed ???
>

Right, do rapid feeds until told otherwise.

>G90 set ABS positioning
>G54 Work offset position coord #1 set to x=0" y=2.7969" and
>"A0.
>

A0 means to set the A axis (which is a rotary axis parallel to the X axis)
to zero degrees.

>S5000 spindle RPM"
>M93 is machine dependant I've several definitions for this one
>"Release Power???"
>G4P2 dwell and let the quill get up to speed is my guess.
>
>

Not quite. The S5000 has no effect, as there is no M03 or M04 command
to START the spindle. I'm guessing this dwell might be for the axes to
unlock or something.

>Seems reasonable ..?.
>
>

Yup, without knowing more about the machine, that all seems about right.
There are a million interpretations, and sets of rules that you have to
follow
for each different control. Like, some controls won't allow a start spindle
unless the spindle speed is set on that line. Some won;t allow a G0 or G01
unless there is an axis coordinate on the line.

Jon