HEIDENHAIN PT 855 for Turning - Manual (Page 17)

I - 2 Working with POSITIP – First Steps
18 Operating Instructions POSITIP 855
Entering tool data and setting the datum
Before you can use a tool you must enter its tool data (cutting
edge position). You can enter the data for up to 99 tools. A work-
piece datum must also be entered before you can start machining.
Normally the workpiece face (flat surface) is given the value Z = 0.
“ Freezing” a position when turning the first diameter
If you want to measure the diameter of the workpiece after turning
the first diameter, you can store (“freeze”) the actual position
before retracting the tool. This is done in the
ACTUAL VALUE
operating mode with the Note/Set function. See page 21 for an
explanation of this function and an example.
Tool table
When you preset tools, POSITIP automatically stores the tool data
in a table. You can access the tool table with a user parameter.
If you change values in the table, the position display will no longer
show the values it displayed after tool presetting.
Selecting tools
The number of the current tool is shown in a small box at the
lower right of the screen (next to the letter T). Use the vertical
arrow keys to select another tool.