Chamfer Generator (90° Entry/Exit)

Strategy: Inside-Out Motion. Entry/Exit: Perpendicular (90°) to cut direction using Safety Offset (#7).
Logic: Opposite sides finish one full side at a time. Single direction retracts every pass. Double direction stays linked on the same connected chain.

1. Part Geometry & Origin

Length (X)

Width (Y)

Origin Location (G54 X0 Y0)

2. Machining Sides

+Y (Top)

-X (Left)

Zero

+X (Right)

-Y (Bottom)

3. Macro Variables (#)

#1Start Z

#2Final Z

#3DOC

#4Angle

deg

#5Tool Dia

#6XY Safety

#9Z Retract / Safe Z

4. Tool, Feed & Direction

Tool No.

Offset D

Feed

RPM

Spindle / Head M-Code

Cut Direction Mode

Live Part & Sides Preview

Amber crosshair represents coordinate origin G54 (X0, Y0). Teal borders indicate active cutting sides.

G-Code Program

Linear XY Chamfering and Deburring

Chamfering represents the removal of sharp corners along raw cut edges, typically creating a 45-degree bevel. In manufacturing, chamfering serves three critical functions: deburring (removing sharp metal flakes that pose safety risks), enhancing stress distribution to prevent fatigue cracks, and improving assembly clearances. To write coordinates for 45-degree chamfer tools along flat linear profiles (G17 plane), programmers must compute exact Z-depth offsets and lateral tool radius compensation values.

The mathematical coordinates used to calculate linear chamfer setups are:

Cutter Tip Offset: The Z-axis plunge depth must exceed the actual chamfer width to ensure the cutting action occurs along the center face of the bevel, avoiding the fragile tip of the chamfer mill.
Effective Diameter: D_eff = D_tip + 2 * (Z_depth - Chamfer_width) * tan(alpha), where alpha is the half-angle of the tool (typically 45°).

Step-by-Step XY Chamfer Path Generation

Input Chamfer Geometry: Enter the blueprint chamfer width (typically 0.2mm to 1.5mm) and the chamfer tool angle (default is 90° for standard chamfer mills).
Define Tool Dimensions: Enter the nominal cutter diameter and the flat tip diameter (tip diameter is 0 for pointed chamfer mills).
Z-Axis Clearance: Define your plunge clearance depth. Plunging slightly lower ensures you do not drag the tool tip directly on the finished part face.
Lead-In / Lead-Out: Select linear or circular arc entry. Circular arc lead-in prevents dwelling tool marks on finished part walls.
Generate G-Code: Instantly view the clean linear G-code incorporating cutter offset compensation.

Why You Should Never Chamfer with the Tool Tip

Standard chamfer mills come to a sharp point. However, at the absolute center tip of a pointed cutter, the cutting speed (Surface Feet per Minute) drops to exactly zero (since the diameter is virtually zero). Dragging a zero-speed tip through material results in tearing, heavy burrs, chip packing, and immediate cutter damage. This calculator automatically shifts the toolpath down (Z-depth shift) and offsets the XY path to ensure you cut with the highly efficient middle portion of the carbide insert.

Linear Chamfering Frequently Asked Questions (FAQ)

Q: What tool should I use for general deburring on a mill?
A: Standard 90-degree spot drills, 90-degree high-performance chamfer mills, or indexable carbide chamfer cutters are ideal. For tight spaces, solid carbide engraving tools can also be used.

Q: Why does my chamfer have a small step or lip along the bottom?
A: This occurs due to tool deflection (chatter) or if your Z-axis height calibration (tool setter coordinate) is slightly misaligned from the G54 workspace coordinate.

Q: Can I use standard end mills to chamfer?
A: Standard square end mills cannot chamfer in a single pass. You must use 3D surfacing toolpaths (e.g. ball nose end mills step-over profiling), which requires a CAM post-processor. Single-pass XY chamfering requires an angled chamfer cutter.