HEIDENHAIN PT 880 - Manual (Page 37)

POSITIP 880 37
I – 4 Distance-T
o-Go
Example: Milling a shoulder by traversing to display value zero
The coordinates are entered as absolute dimensions; the datum is the
workpiece zero. See Fig. I.31 & Fig. I.32.
Corner 1 : X = 0 mm / Y = 20 mm
Corner 2 : X = 30 mm / Y = 20 mm
Corner 3 : X = 30 mm / Y = 50 mm
Corner 4 : X = 60 mm / Y = 50 mm
Operating mode: DISTANCE-TO-GO
Preparation:
8 Enter the tool data.
8 Pre-position the tool to an appropriate location (such as X = Y = -20
mm).
8 Move the tool to milling depth.
Select the Y axis key.
Enter nominal position value for corner point 1:
Y = 20 mm and
select tool radius compensation R + with TOOL COMP
(R+)
soft key.
Transfer the nominal position value by pressing USE.
The graphic positioning aid for the Y axis is displayed.
Traverse the Y axis until the display value is zero. The
square in the graphic positioning aid is now centered
between the two triangular marks.
Once the axis is moved to zero the axis value is
incremented to axis value in the next block.
Press the NEXT BLOCK soft key to advance.
Fig. I.31 Single cycle preset
Fig. I.32
NOMINAL POSITION VALUE