HEIDENHAIN TNC 128 (77184x-01) - Manual (Page 270)

270 Programming: Special functions
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.4 Defining coor
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TRANS DATUM TABLE
You can define a datum shift by selecting a datum number from a
datum table with the TRANS DATUM TABLE function. Proceed as follows
for the definition:
 Show the soft-key row with special functions
 Select the menu for defining various plain-language
functions
 Select transformations
 Select datum shifting with TRANS DATUM
 Press the arrow key to move to TRANS AXIS
 Select datum shifting with TRANS DATUM TABLE
 If desired, enter the name of the datum table from
which you want to activate the datum number, and
confirm with the ENT key. If you do not want to define
a datum table, confirm with the NO ENT key
 Enter the line number to be activated by the TNC, and
confirm with the ENT key
TRANS DATUM RESET
Use the TRANS DATUM RESET function to cancel a datum shift. How you
previously defined the datum is irrelevant. Proceed as follows for the
definition:
 Show the soft-key row with special functions
 Select the menu for defining various plain-language
functions
 Select transformations
 Select datum shifting with TRANS DATUM
 Press the arrow key to move to TRANS AXIS
 Select the TRANS DATUM RESET datum shift
Example: NC block
13 TRANS DATUM TABLE TABLINE25
If you did not define a datum table in the TRANS DATUM
TABLE
block, then the TNC uses the datum table already
selected in the NC program with SEL TABLE, or the datum
table with status M selected in one of the Program Run
modes.
Example: NC block
13 TRANS DATUM RESET