2D Facing

2D Facing is used to flatten the top surface of your stock, usually before other operation are undertaken.

2D Facing requires planer surfaces or polysurfaces to create the toolpath on - these surfaces can not have cut outs. The toolpath will have the appearance of a back and forth pattern that covers the complete surface.

You will need to place the surfaces into the following layer in the Rhino document:

KaroroCAM/2D Facing

Facing Pass Angle

This sets the angle (relative to the X axis) of the facing passes.

Tool

Tool Shape

2D Facing uses Flat End Mill tools - usually of larger diameter than other tool paths

Tool Diameter

Sets the diameter of your tool bit in mm.

Tool Number

Select Tool number that matches the tool spec'd in your tool path - mostly important for machines with auto tool change ability.

Spindle Speed

Sets the spindle speed for this operation in your GCode output file

Step Over

Step Over

Sets the step over between offset passes in the 2D Facing

TIP: Good practice is to set this to 50% of your tool diameter or less

Tool Containment

This menu give you three options to contain the Facing toolpath on the surface.

Facing Depth

Facing Depth Position

Selects the reference position for the facing depth. Can be:

Selected Curves - the facing depth will be referenced to the curves in the 2D Facing layer in the Rhino document. These can all be at different Z heights

Stock Top - Facing depth is referenced to the top of the current stock - all facing will be done to the same depth

Stock Bottom - Facing depth is referenced to the bottom of the current stock - all facing will be done to the same depth

NOTE: Facing Depth Offset is a Z offset from this selection

Facing Depth Offset

Offset in mm in the Z direction from the selected Facing Depth Position of the final facing depth. 

Multiple Depths

USE MULTIPLE DEPTHS

Check this box to enable multiple depth cutting

Max Step Down

Maximum step down in mm per pass when doing multiple depth facing. 

NOTE: If the total cutting depth (Stock top - Facing Depth Position + Facing Depth Offset) is not an even division by this number the deepest pass will be less than this number.

ORDER CUT BY Z DEPTH

Check this box to order facing by Z depth rather than per outline when doing multiple depth cutting. 

Post Process

Post Process 2D Facing

Click this button to proceed to the Post Process Selection and Gcode File saving

VIDEO - 2D Facing in KaroroCAM