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1/ Command :

• 4CBRV

2/ Description :
This tool automatically draws the top-down plan view of four counterbore holes symmetrically positioned inside a rectangle.

• Layout: Similar to 4CRV, but instead of simple circles, it generates the concentric circles representing counterbore holes (bolt head + shaft clearance).

• Input: Requires the rectangle's corner points, horizontal and vertical offsets from the corner, and the diameters for both the small (shaft) and large (head) circles.

• Auto-Layer: Automatically creates the center layer if missing.

3/ How to Use :

1. Type 4cbrv in the command line and press Enter.

2. Click the First Corner Point (PT1) of the rectangle.

3. Click the Second Corner Point (PT2).

4. Enter the Horizontal Offset from the corner to the hole center.

5. Enter the Vertical Offset from the corner to the hole center.

6. Enter the Small Circle Diameter.

7. Enter the Large Circle Diameter.

8. Four counterbore plans (with center lines) are drawn at the specified locations.