G90Outer/Inner Diameter Turning
Single-pass OD/ID turning cycle. Omit R for straight cuts. R > 0 tapers toward chuck; R < 0 tapers away.
Address Letter Reference
| Address | Meaning | Notes |
|---|---|---|
| X | Diameter / X-axis target | Diameter mode (G7 / G8) |
| Z | Z-axis target | Negative = away from chuck |
| F | Feed rate / thread lead | in/rev (G99) or in/min (G98); lead = 1 / TPI |
| R | Cycle-dependent | Retract (in), taper (in), or repeat count |
| P | Block number / thread param | 0.0001" in G74-G76; block # in G71-G73 |
| Q | Block number / peck depth | 0.0001" in G74-G76; block # in G71-G73 |
| U | Incremental X / depth of cut | Cycle-dependent usage |
| W | Incremental Z / depth of cut | Cycle-dependent usage |
| S | Spindle speed | RPM with G97; SFM with G96 |