Setting The Datum In A Tilted Coordinate System; Datum Setting On Machines With Rotary Tables; Datum Setting On Machines With Spindle-Head Changing Systems - HEIDENHAIN ITNC 530 User Manual

Setting the datum in a tilted coordinate system

After you have positioned the rotary axes, set the datum in the same
manner as for a non-tilted system. The behavior of the TNC during
datum setting depends on the settings of machine parameter 7500 in
your kinematics table:
MP 7500, bit 5=0
With an active tilted working plane, the TNC checks during datum
setting in the X, Y and Z axes whether the current coordinates of the
rotary axes agree with the tilt angles that you defined (3D-ROT
menu). If the tilted working plane function is not active, the TNC
checks whether the rotary axes are at 0° (actual positions). If the
positions do not agree, the TNC will display an error message.
MP 7500, bit 5=1
The TNC does not check whether the current coordinates of the
rotary axes (actual positions) agree with the tilt angles that you
defined.
Always set a reference point in all three reference axes.
If your machine tool is not equipped with axis control, you
must enter the actual position of the rotary axis in the
menu for manual tilting: The actual positions of one or
several rotary axes must match the entry. Otherwise the
TNC will calculate an incorrect datum.

Datum setting on machines with rotary tables

If you use a rotary table to align the workpiece, for example with
probing cycle 403, you must set the table position value to zero after
alignment and before setting the datum in the linear axes X, Y and Z.
The TNC will otherwise display an error message. Cycle 403 provides
you with an input parameter for this purpose (see User's Manual for
Touch Probe Cycles, "Basic Rotation Compensation via Rotary Axis").
Datum setting on machines with spindle-head
changing systems
If your machine is equipped with a spindle head changer, you should
use the preset table to manage your datums. Datums saved in preset
tables account for the active machine kinematics (head geometry). If
you exchange heads, the TNC accounts for the new head dimensions
so that the active datum is retained.
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