Smithy CNC Mills - Manual (Page 21)

SmithyCNC Programmer’s Reference Manual:G Codes
SmithyCNC Programmer’s Reference Manual: G-Codes 2-6
2.4 G33: Spindle-Synchronized Motion
For spindle-synchronized motion, code G33 X- Y- Z- K- where K gives the distance
moved in XYZ for each revolution of the spindle. This syntax is subject to
change (In particular, to use F- instead of K-). For instance, G33 Z1 K.0625 pro-
duces a 1 inch motion in Z over 16 revolutions of the spindle. This command might
be part of a program to produce a 16TPI thread.
All the axis words are optional, except that at least one must be used. This will pro-
duce coordinated linear motion to the destination point at a rate dependant on
the speed of the spindle.
It is an error if:
* all axis words are omitted.
* the spindle is not turning when this command is executed
* the requested linear motion exceeds machine velocity
limits due to the spindle speed
2.5 G4: Dwell
For a dwell, program G4 P- . This will keep the axes unmoving for the period of
time in seconds specified by the P number. It is an error if:
* the P number is negative.
2.6 G10: Set Coordinate System Data
The RS274/NGC language view of coordinate systems is described in
Section[sub:Coordinate-Systems].
To set the coordinate values for the origin of a coordinate system, program G10 L2
P - X- Y- Z- A- B- C-, where the P number must evaluate to an integer in
the range 1 to 9 (corresponding to G54 to G59.3) and all axis words are optional.
The coordinates of the origin of the coordinate system specified by the P number
are reset to the coordinate values given (in terms of the absolute coordinate sys-
tem). Only those coordinates for which an axis word is included on the
line will be reset.
It is an error if:
* the P number does not evaluate to an integer in the
range 1 to 9.