Milling Patterns; Circle Pattern; I – 5 Milling Patterns - HEIDENHAIN POSITIP 880 User Manual

I – 5 Milling Patterns
This chapter describes the hole pattern functions CIRCLE PATTERN,
LINEAR PATTERN, RECTANGLE POCKET.
In the operating mode DISTANCE-TO-GO, use the soft keys to select the
desired hole pattern function or pocket milling, and enter the required
data. This data can usually be taken from the workpiece drawing (e.g.
hole depth, number of holes, dimensions of the pocket, etc.).
With hole patterns, the POSITIP 880 then calculates the positions of
all the holes and displays the pattern graphically on the screen. With
pocket milling, it calculates all of the traverse paths for the roughing
out of the pocket. The graphic positioning aid appears when you begin
execution, enabling you to position simply by traversing to display
value zero.

Circle Pattern

Automatic advance function
Once you have moved the table into position and machined to depth,
the POSITIP 880 will automatically advance. You can also manually
advance by pressing the NEXT HOLE soft key.
POSITIP 880 will not automatically advance if the depth is
set to THRU.
Information required:
Pattern type (full or half)
Holes (no. of)
Center (center of circle pattern in pattern plane)
Radius (defines radius of the circle pattern)
Start angle (angle of 1st hole in the pattern)
Step angle (optional: this only applies if creating a circle segment.)
Depth (the target depth for drilling in the tool axis)
POSITIP 880 calculates the coordinates of the holes which you then
move to simply by traversing to display value zero. The graphic
positioning aid is available for all moving axes.
A circle pattern is executed as a series of presets to the hole location
in the pattern plane and the drill depth.
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