HEIDENHAIN PT 855 for Turning - Manual (Page 23)

I - 2 Working with POSITIP – First Steps
24 Operating Instructions POSITIP 855
Displaying and moving to positions
Z
1
X
15
2
3 4
20
45
0
5
Select the axis (X).
Enter the coordinate for nominal position : X = 15 mm. Confirm entry.
The positioning aid appears for the X axis;
the nominal position remains at the top of the screen.
1 5
ENT
Move the X axis until the display value is zero.
Select the axis ( Z
S
).
Enter the coordinate for nominal position : Z
S
= –20 mm. Confirm entry.
The positioning aid appears for the Z
S
axis;
the nominal position remains at the top of the screen.
2
ENT
0
Move the Z
S
axis until the display value is zero.
1
N o m i n a l p o s i t i o n v a l u e ?
X + ....
N o m i n a l p o s i t i o n v a l u e ?
Z
S
+ ....
1
2
3
Example: Turning a shoulder by traversing to display value zero
In this example, both incremental and absolute nominal position
values are used.
Position Z = 0 mm X = 15 mm
Position Z = –20 mm X = 15 mm
Position Z = –20 mm I X = +5 mm
Position I Z = –45 mm I X = 0 mm
Preparation:
➤
➤ ➤ ➤ ➤ Preset the tool and set the workpiece datum as described
earlier in this chapter.
➤ ➤ ➤ ➤ ➤ Set the user parameters (see Chapter I - 6):
• Sum display Z
S
or for both axes (X
S
and Z
S
)
• Radius display for both axes X and Z
• Set Ovrsize ON / OFF to OFF
➤ ➤ ➤ ➤ ➤ Preposition the tool appropriately
(such as X = +20 mm, Z = +10 mm).
If you want to turn a larger shoulder, use the Multipass
cycle (see Chapter I - 3). This cycle allows you to turn
the shoulder in any number of infeeds without having to
enter coordinates for each feed move.
Operating mode: DISTANCE-TO-GO
2
4