HEIDENHAIN ND 522 - Manual (Page 53)

ND 522/523 53
I -
3
Milling
Specific
Oper
ations
Execution
 Execute the milling operation by opening the incline milling form,
and pressing the Enter key. The screen switches to the incremental
DRO view.
 Initially, the DRO shows the current incremental moving 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.
 After pressing NEXT PASS, the incremental display shows the
distance from the next step along the line’s contour.
 If no step size was specified, the incremental display always shows
the distance from the closest point on the line. To follow the
contour, move the two axes in small steps, keeping the (X, Y)
positions as close to 0 as possible.
 When executing a surface milling operation, three views are
available: incremental DRO, contour, and absolute DRO. Press the
VIEW soft key to toggle through the available screens.
 The contour view shows the position of the tool relative to the
milling surface. When the crosshair representing the tool is on the
line representing the surface, the tool is in position. The tool
crosshair remains fixed in the center of the graph. As the table is
moved, the surface line moves.
 Press the END soft key to exit the milling operation.
Tool radius compensation is applied based on the radius of
the current tool. If the plane selection involves the tool axis,
the tool tip is assumed to have a ball end.
The tool offset direction (R+, or R-) is applied based on the
tool position. The operator must approach the contour
surface from the appropriate direction for tool
compensation to be correct.