11 An Introduction to CNC Milling
11.2 Setting Spindle Speeds
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The Setup Coordinate Systems window is displayed.
3.
Select one of the
G54
to
G59
codes
4.
Enter the coordinates for the first workpiece, and click on
Apply
.
5.
Repeat this procedure for as many coordinate systems as necessary by setting up a coordinate system for
each point on the part that corresponds to the zero point of the shape you are milling.
6.
In your program, use the Coordinate Systems group G codes to switch between coordinate system and run
the subprogram that contains the NC code for the complex shape.
0
.
11.2.
SETTING SPINDLE SPEEDS
Spindle speed refers to the rotational speed at which the spindle rotates the tool around its vertical axis.
Spindle speed is usually defined in units of rotations per minute (RPM).
When selecting a spindle speed, the following factors must be taken into account.
Info Table: Spindle Speed Factors
Factor
Description
Tool
diameter
Spindle speed is inversely proportional to tool diameter: the larger the tool, the lower the
spindle speed.
Relative
material
hardness
Spindle speed is inversely proportional to the relative hardness of the material: the harder
the material, the slower the recommended spindle speed.
