CYCLE BRKCHP(288) - Deep drilling with chip breaking
Kept for compatibility. CYCLE is retained only for compatibility with older postprocessors. Current versions of the CAM system generate the extended cycle command EXTCYCLE instead: it offers more capabilities and lets the CAM system fully simulate all of the cycle's nested motions, which CYCLE does not. Output of CYCLE can still be turned on in the CAM system settings, but this is not recommended.
Deep drilling with chip removing cycle performs rapid approach to the safe level and repeated drilling according to specified cut-in depth value ZI and withdrawal Zi values.
Cycle includes:
- Rapid travel to the Z safe level.
- Work feedrate travel to the Zl.
- Rapid retract to the Zi withdrawal value and Dwell.
- Work feedrate travel to the Zl + Zi level.
- Rapid retract to the Zi withdrawal value and Dwell.
- Repeat until the hole depth level is reached.
- Rapid retract to the Safe plane level.
Command
CYCLE BRKCHP(288), A a, MMPM(315), N nm, F f,
L l, I i, P p, DWELL(279) h, T t
or
CYCLE BRKCHP(288), A a, MMPR(316), M nm, F f,
L l, I i, P p, DWELL(279) h, T t
Parameters
| Parameter | CLD array | CLD name | Description |
|---|---|---|---|
| BRKCHP(288) | CLD[1] | CLD.Type | Cycle type 288 (BRKCHP). |
| a | CLD[2] | CLD.A | Hole depth in current measure units (mm or inches). |
| MMPM(315) MMPR(316) |
CLD[3] | CLD.MMPM | Feedrate measure units: 315 (MMPM) – mm per minute (inches per minute), 316 (MMPR) – mm per revolution (inches per revolution). |
| nm | CLD[4] | CLD.NM | Work feedrate value. |
| f | CLD[5] | CLD.F | Safe level. |
| L | CLD[6] | CLD.L | Cut in value Zl |
| i | CLD[7] | CLD.I | Withdrawal value Zi |
| p | CLD[8] | CLD.P | Safe plane level. |
| DWELL | CLD[9] | CLD.DWELL | Dwell time keyword. |
| h | CLD[10] | CLD.H | Tool dwell in seconds. |
| t | CLD[11] | CLD.Top | Hole top level. |
Access from .NET
Delivered through the OnCycle handler (dispatch on the cycle type in cmd/cld[1]):
public override void OnCycle(ICLDCycleCommand cmd, CLDArray cld)
See Hole machining cycles (CYCLE) for the common .NET model.