HEIDENHAIN TNC 620 User Manual page 253

Tools | Tool data
Overtime for tool life
This feature must be enabled and adapted by the
machine tool builder.
The tool condition at the end of planned tool life depends on e.g.
the tool type, machining method and workpiece material. In the
OVRTIME column of the tool table, enter the time in minutes for
which the tool is permitted to be used beyond the tool life.
The machine manufacturer specifies whether this column is
enabled and how it is used during tool search.
Prerequisites for NC blocks with surface-normal vectors and
3-D compensation
The active radius (R + DR) of the replacement tool must not
deviate from the radius of the original tool. You can enter the delta
values (DR) either in the tool table or in the TOOL CALL block.
With deviations, the control displays an error message and does
not replace the tool. You can suppress this message with the M
function M107, and reactivate it with M108.
Further information: "Three-dimensional tool compensation
(option 9)", page 579
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2017
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