HEIDENHAIN PT 855 for Milling - Manual (Page 37)

I - 3 Hole Patterns and Rectangular Pocket
POSITIP 855 Operating Instructions 35
Function Soft Key/Key
Select full circle
Select circle segment
Got to next-highest level
Go to next-lowest level
Confirm entry values
End input
Fig. 23: On-screen operating instructions:
graphics for bolt hole circle pattern
(full circle)
Hole Patterns and Rectangular Pocket
This chapter describes the hole pattern functions
Circle
Pattern
and
Linear Pattern,
and the milling of
Rectangular Pockets.
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 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 rough-
ing out of the pocket. The graphic positioning aid appears when
you begin execution, enabling you to position simply by traversing
to display value zero.
Bolt hole circle patterns
Information required:
• Full circle or circle segment
• Number of holes
• Centerpoint coordinates and radius of the circle
• Starting angle (angular position of first hole)
• Circle segment only: angle step between the holes
• Hole depth
POSITIP calculates the coordinates of the holes which you then
move to by traversing to display value zero.
The graphic positioning aid is available for all moving axes. The po-
sitioning aid frame for the tool axis is dashed.
The graphic enables verification of the hole pattern before you start
machining. It is also useful when:
• selecting holes directly
• executing holes separately
• skipping holes
ENT
Fig. 24: On-screen operating instructions:
graphics for bolt hole circle pattern
(circle segment)
I - 3