Distance-To-Go; Displaying And Moving To Positions; I – 4 Distance-To-Go - HEIDENHAIN POSITIP 880 User Manual

I – 4 Distance-To-Go

Displaying and Moving to Positions

Distance-To-Go feature
Although it is often sufficient to have POSITIP 880 display the
coordinates of the actual position of the tool, it is usually better to use
the distance-to-go feature — this enables you to approach to nominal
positions simply by traversing to display value zero. Even when
working with the distance-to-go feature you can enter coordinates in
absolute or incremental dimensions. Make sure you are in
DISTANCE-TO-GO mode.
Graphic positioning aid
When you are traversing to display value zero, POSITIP 880 displays a
graphic positioning aid. See Fig. I.29.
POSITIP 880 displays the graphic positioning aid in a narrow rectangle
underneath the currently active axis. Two triangular marks in the
center of the rectangle symbolize the nominal position you want to
reach.
A small square symbolizes the axis slide. An arrow indicating the
direction appears in the square while the axis is moving. You can easily
tell whether you are moving towards or away from the nominal
position. Note that the square does not begin to move until the axis
slide is near the nominal position.
Refer to the JOB SETUP menu to setup the graphic positioning aid.
Tool Selection
In DISTANCE-TO-GO mode, the up/down arrow keys may be used to
select the next or previous tool number
Taking the tool radius into account
POSITIP 880 has a tool radius compensation feature. This allows you
to enter workpiece dimensions directly from the drawing. The
displayed remaining distance is then automatically lengthened (R+) or
shortened (R–) by the value of the tool radius. See Fig. I.30.
Entering tool data
Enter tool data with the TOOL TABLE soft key.
Choose TOOL TABLE soft key.
Cursor to the desired tool and press ENT. The TOOL DESCRIPTION
form will appear.
Enter the tool diameter.
Enter the tool length.
Enter the tool unit.
Enter the tool type and press ENT.
Press USE twice.
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Fig. I.29 Graphic Positioning Aid in use
Fig. I.30 Tool radius compensation
I Operating Instructions