Smithy CNC Mills - Manual (Page 111)

Example 4 - Absolute G81 R > Z
This is a plot of the path of motion for the second g81 block of code.
G91 G81 G98 X4 Y5 Z-0.6 R1.8 L3
Since this plot starts with (0, 0, 0), the interpreter adds the initial Z 0 and R 1.8
and rapids to that location. After that initial z move, the repeat feature works
the same as it did in example 3 with the final z depth being 0.6 below the R
value.
Example 5 - Relative position R > Z
10.4 G82 Cycle
The G82 cycle is intended for drilling.
0. Preliminary motion, as described above.
1. Move the Z-axis only at the current feed rate to the Z position.
2. Dwell for the given number of seconds.
3. Retract the Z-axis at traverse rate to clear Z. The motion of a G82 canned
cycle looks just like g81 with the addition of a dwell at the bottom of the Z
move. The length of the dwell is specified by a p# word in the g82 block.
G90 G82 G98 X4 Y5 Z1.5 R2.8 P2
Would be equivalent to example 2 above with a dwell added at the bottom of
the hole.
SmithyCNC Programmer’s Reference Manual: Mill Canned Cycles
SmithyCNC Programmer’s Reference Manual: Mill Canned Cycle 10-8