4 d a tum set ting without a 3-d t o uc h pr obe – HEIDENHAIN TNC 620 (340 56x-02) ISO programming User Manual
Page 327

HEIDENHAIN TNC 620
327
12.4 D
a
tum Set
ting without a 3-D T
o
uc
h Pr
obe
Function
Soft key
Directly transfer the actual position of the tool 
(the measuring dial) as the new datum: This 
function only saves the datum in the axis which 
is currently highlighted.
Assign any value to the actual position of the tool 
(the measuring dial): This function only saves the 
datum in the axis which is currently highlighted. 
Enter the desired value in the pop-up window.
Incrementally shift a datum already stored in the 
table: This function only saves the datum in the 
axis which is currently highlighted. Enter the 
desired corrective value with the correct sign in 
the pop-up window. If inch display is active: enter 
the value in inches, and the TNC will internally 
convert the entered values to mm.
Directly enter the new datum without calculation 
of the kinematics (axis-specific). Only use this 
function if your machine has a rotary table, and 
you want to set the datum to the center of the 
rotary table by entering 0. This function only 
saves the datum in the axis which is currently 
highlighted. Enter the desired value in the pop-up 
window. If inch display is active: enter the value 
in inches, and the TNC will internally convert the 
entered values to mm.
Select the BASIC TRANSFORMATION/AXIS 
OFFSET view. The BASIC TRANSFORMATION 
view shows the X, Y and Z columns. Depending 
on the machine, the SPA, SPB and SPC columns 
are displayed additionally. Here, the TNC saves 
the basic rotation (for the Z tool axis, the TNC 
uses the SPC column). The OFFSET view shows 
the offset values to the preset. 
Write the currently active datum to a selectable 
line in the table: This function saves the datum in 
all axes, and then activates the appropriate row in 
the table automatically. If inch display is active: 
enter the value in inches, and the TNC will 
internally convert the entered values to mm.
