Fanuc G87 Canned Cycle for Side Drilling on CNC Lathes (Fanuc Oi Control)

      

    The G87 Side Drilling Canned Cycle is used on CNC lathes, particularly with Fanuc controls (e.g., Fanuc Oi), for side or radial drilling. This cycle is designed for drilling holes perpendicular to the spindle axis, often using live tooling in machines equipped with Y-axis or driven tools. Here's a detailed guide:

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Format

G87 X(U)__ Z(W)__ Y__ R__ Q__ P__ F__ K__;

Explanation of Parameters

• X(U): X-axis coordinate of the hole center in absolute (X) or incremental (U).
• Z(W): Z-axis coordinate of the hole center in absolute (Z) or incremental (W).
• Y: Y-axis coordinate (if applicable) of the hole center.
• R: Retraction position above the surface (clearance).
• Q: Depth of each peck (incremental step depth).
• P: Dwell time at the bottom of each peck (in milliseconds).
• F: Feedrate (cutting speed during drilling).
• K: Total depth of the hole.

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Cycle Process

1. The tool moves to the X, Y, and Z coordinates at a rapid traverse.
2. It positions to the clearance plane (R) before drilling.
3. Drilling begins in peck increments (Q) with a dwell (P) at each peck depth if specified.
4. After reaching the final depth (K), the tool retracts to the R plane.

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Example

Let's drill a hole at X50.0, Z100.0, with a total depth of K20.0, peck depth of Q5.0, feedrate F100, and dwell of P500ms:

G0 X50 Z100    ; Rapid to hole location
G87 X50 Z100 R2 Q5 P500 F100 K20;  

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Notes

1. Live Tooling Required: Ensure the machine has live tooling or driven tools for radial drilling.
2. Tool Orientation: Properly orient the tool for radial cutting.
3. Clearance: Set the clearance plane (R) high enough to avoid collisions.
4. Control Compatibility: Verify the G87 canned cycle's availability in your specific Fanuc Oi control version.