Power Up; Reference Mark Evaluation; Working Without Reference Mark Evaluation - HEIDENHAIN ND 780 Handbuch

Power Up

Switch on the power (located on the back). The initial
screen will appear (see figure at right). This screen
will only appear the first time the unit is powered up.
The following steps may have already been
completed by the installer.
Select the proper language by pressing the

LANGUAGE soft key.
 Choose your application of either MILL, or TURN.
The application MILL/TURN soft key toggles
between these two settings.
Next, select the number of axes required. When

complete, press the ENTER hard key.
If necessary, the DRO application can be changed
later in Installation Setup, under Counter Settings.
The ND 780 is now ready for the remaining setup requirements. It is
now in the operating mode "Absolute". Each active axis will have a
flashing "REF" sign next to it. The following section, "Reference Mark
Evaluation", describes setting up this feature.

Reference Mark Evaluation

The ND 780's reference mark evaluation feature automatically re-
establishes the relationship between axis slide positions and display
values that you last defined by setting the datum.
If the axis encoder has reference marks, the "REF" indicator will flash.
After crossing over the reference marks, the indicator will stop
flashing and change to non-flashing REF.

Working without reference mark evaluation

You can also use the ND 780 without crossing over the reference
marks. Press the NO REF soft key to exit the reference mark
evaluation routine and continue.
You can still cross over reference marks at a later time, if it becomes
necessary to define datums that can be re-established after a power
interruption. Press the ENABLE REF soft key to activate the reference
mark evaluation routine.
If an encoder is setup without reference marks, then the
REF indicator will not be displayed, and datums will be lost
once power is turned off.
24
I Operating Instructions