1594 HEIDENHAIN Technical Manual iTNC 530 HSCI
Tool life,
replacement tool
You can enter two tool life values (TIME1 and TIME2) and one replacement tool
(RT) for each tool in the tool table.
For the TOOL CALL:
CUR.TIME (current tool age) > TIME2: Pocket or tool number (MP7480) of the
replacement tool and a T strobe M4073 are output and M4525 is set.
CUR.TIME (current tool age) > TIME2 > 0 and no replacement tool is defined:
After expiration of the time, the error message Max. tool age expired is
displayed for this tool, and M4546 and M4525 are set.
CUR.TIME (current tool age) > TIME1: The NC sets M4543 and M4525.
You decide in the PLC what should happen when M4543 or M4546 is set (e.g.
display a PLC error message).
With M101, you activate the automatic insertion of the replacement tool after
expiration of the tool life (TIME1 or TIME2). With M102, you deactivate the
insertion. The tool is not changed immediately after expiration of the tool life,
but rather it varies depending on the processor load. The tool change is
transmitted delayed by at least one block and by no more than one minute.
In order to also be able to activate the automatic insertion of the replacement
tool with TCPM, you must program a retraction with M140 in the tool change
macro. After the tool change, the tool moves with an approach logic to the pre-
compensated position and then returns to the contour.
To synchronize the current machine status and the look-ahead calculation with
an NC macro call, see "NCMACRO.SYS" on page 1709.
No radius compensation is given in NC blocks with surface-normal vectors.
One delta value for tool length and radius (DR and DL) can be entered for each
tool in the tool table. These delta values are taken into account by the iTNC.
Setting bit 14 in MP7682 prevents a TOOL CALL from being output if no tool
with sufficient TIME2 for the precalculated processing time is found when
searching for a tool in the sequence given by MP7484 (search sequence in tool
magazines). If MP7682 bit 14 is set, the error message "Tool life expired" is
displayed and the machining program is interrupted with an NC Stop. The
machine parameter is also effective for the representation in the tool-usage
list.
If the radius of the replacement tool differs from the original tool, you must
define this in the DR column. The delta value must always be negative. If you
enter a positive delta value, the error message Tool radius too large
appears.
You can suppress this error message with the M function M107, and
reactivate it with M108.
You can select whether the tool length is given with respect to the south pole
or the ball center of a spherical cutter:
With MP7680, select whether the tool radius (R2) should be taken into
account for the calculation of the tool length.
In standard NC programs (NC block with RR, RL or R0), the same radius must
be defined for the replacement tool as for the original tool.
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