20 I
I – 2 Milling Specific Operations
Arc Milling
Entry Form:
The Arc Milling form is used to specify a curved
surface to be milled. Press the ARC milling hard
key to open the form.
U Plane Selection: Select the plane by pressing the PLANE soft key.
The current selection is shown on the soft key, and in the plane
field. The graphic in the message box aids in selecting the correct
plane.
U Center Point: Enter the coordinates of the arc’s center point.
U Start Point: Enter the coordinates of the start point.
U End Point: Enter the coordinates of the end point
U Radius: Enter the radius of the arc.
U Step: Enter the step size. When milling, this is the distance along the
circumference of the arc between each pass, or step along the arc’s
contour.
U Press ENTER, or RUN to execute the milling operation.
U Press C to exit the form without executing. Settings are retained
until power is turned off.
Executing the Arc Milling feature
U Execute the milling operation by opening the entry form, and
pressing the RUN soft key, or ENTER key. The screen switches to
the incremental DRO view.
U Initially, the DRO shows the current incremental distance from the
start point. Move to the start point, and make a plunge cut, or the
first pass across the surface. Press the NEXT PASS soft key to
continue with the next step along the contour.
U After pressing NEXT PASS, the incremental display shows the
distance from the next step along the arc’s contour.
U If no step size was specified, the incremental display always shows
the distance from the closest point on the arc. To follow the contour,
move the two axes in small steps, keeping the (X, Y) positions as
close to 0 as possible.
The Step size is optional. If the value is zero, the operator
decides at run-time how far to move between each step.
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