EXTCYCLE DRILL - Lathe drilling cycle (G81)
Lathe drilling canned cycle DRILL(163) G81 drills axial holes with static tool inside rotated workpiece. The tool approaches the hole at the safe plane level descends at rapid feedrate to the return level, machines the hole at work feedrate, and rapidly retracts to the safe plane level.
Parameters
| CLD array | CLD name | Description |
|---|---|---|
| CLD[1] | CLD.SubCmd | Command type: ON(71) – canned cycle on, CALL(52) – canned cycle call, OFF(72) – canned cycle off. |
| CLD[2] | CLD.SubType | Canned cycle type identifier: DRILL(163). |
| CLD[3] | CLD.CLParams(1) | The top level of a hole (T). |
| CLD[4] | CLD.CLParams(2) | The hole depth measured relative to the top level (D). |
| CLD[5] | CLD.CLParams(3) | The return level (R). |
| CLD[6] | CLD.CLParams(4) | The Safe level (S). |
| CLD[7] | CLD.CLParams(5) | Reserved. |
| CLD[8] | CLD.CLParams(6) | The federate units: 0 – mm/rev, 1 – mm/min. |
| CLD[9] | CLD.CLParams(7) | The Work feed. |
| CLD[10] | CLD.CLParams(8) | The Retract feed. |
Access from .NET
This cycle has no dedicated family handler - it is delivered through the base OnExtCycle (dispatch on cmd.CycleType / cld[2]). See Extended cycle (EXTCYCLE).