Tool Compensation; Tool Length Compensation - HEIDENHAIN ITNC 530 - CONVERSATIONAL PROGRAMMING User Manual

5.3 Tool Compensation

Introduction
The TNC adjusts the spindle path in the spindle axis by the
compensation value for the tool length. In the working plane, it
compensates the tool radius.
If you are writing the part program directly on the TNC, the tool radius
compensation is effective only in the working plane. The TNC
accounts for up to five axes including the rotary axes.
If a part program generated by a CAM system contains
surface-normal vectors, the TNC can perform
three-dimensional tool compensation (see "Three-
Dimensional Tool Compensation (Software Option 2)",
page 487).

Tool length compensation

Length compensation becomes effective automatically as soon as a
tool is called and the spindle axis moves. To cancel length
compensation, call a tool with the length L=0.
Danger of collision!
If you cancel a positive length compensation with TOOL
CALL 0 the distance between tool and workpiece will be
reduced.
After TOOL CALL the path of the tool in the spindle axis, as
entered in the part program, is adjusted by the difference
between the length of the previous tool and that of the
new one.
For tool length compensation, the control takes the delta values from
both the TOOL CALL block and the tool table into account:
Compensation value = L + DL
L: is the tool length L from the TOOL DEF block or tool
table
DL is the oversize for length DL in the TOOL CALL 0
TOOL CALL
block (not taken into account by the position
display).
DL is the oversize for length DL in the tool table.
TAB
HEIDENHAIN iTNC 530
+ DL where
TOOL CALL TAB
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