Here’s a full format guide for setting up a polar coordinate canned cycle using G16 and G15 on a FANUC-controlled machine. In this mode, X represents the radius, and Y represents the angle.
Step-by-Step Full Format for G16/G15 with Canned Cycle (Fanuc)
- Move to the Origin:
- First, position the tool at the origin point (0,0), which will serve as the center of the polar coordinates. This origin is essential for accurate polar positioning.
- Activate Polar Coordinate Mode (G16):
- Switch to polar coordinate mode with G16. In this mode, X will represent the radius from the origin, and Y will represent the angle in degrees.
- Initiate the Canned Cycle with X (Radius) and Y (Angle):
- Define the canned cycle in polar mode using X for radius and Y for angle. Here’s how you might use G81 (a simple drilling cycle) to create holes in a circular pattern:
- Exit Polar Coordinate Mode (G15):
- After all polar coordinate operations are complete, use G15 to exit polar mode and return to standard Cartesian coordinates.
- Cancel the Canned Cycle (G80):
- Once the canned cycle operations are finished, use G80 to cancel the cycle and prevent any unintended repetitions.
- Return to a Safe Position:
- Move the tool to a safe position after the operation.
Complete Example Program on FANUC Control
Here is a full example of a program using G16 and G15 for a polar coordinate canned cycle in FANUC format:
Key Points:
- X = Radius, Y = Angle: In G16 polar mode, X represents the radius and Y the angle.
- Set a Clear Origin: Accurate polar cycles depend on defining a precise origin.
- Use G15 and G80 Properly: Always exit polar mode with G15 and cancel the cycle with G80 when finished.
This setup allows efficient drilling of holes in a circular pattern using polar coordinates on a FANUC-controlled VMC.
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