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4-1 What's the Tool-length Offset?
What's the Tool-length Offset?
This feature keeps the position of the tool tip from changing during cutting, even when you change among tools of different
lengths. This is useful when you want to use multiple tools selectively to cut a single workpiece.
Note, however, that this requires measuring the lengths of the respective tools and saving their adjustment (offset) values in
advance. The figure below shows an example where the gauge surface of the tool holders is used as the reference.
Reference
position
Tool length A
Tool-length Automatic-measurement Feature
This unit also provides a feature for measuring the tool length automatically. Using this can be convenient because it performs
all tasks up through saving the adjustment value in a single step.
☞ P. 59, "4-2 Automatic Measurement of Tool Length"
How to Determine the Adjustment Values
Reference
position
58
Chapter 4 Tool-length Offset
Before tool-length offset
Tool length B
Tool length C
Positive adjustment value
Negative adjustment value
Adjustment
Adjustment
value A
value B
After tool-length offset
When you measure tool length yourself, you make
the distance from the reference position to the
tool tip the adjustment (offset) value. However,
it's best to decide on a clearly defined reference
position. This figure shows an example where you
decide on the reference tool and use the position
of its tool tip as the reference. (In this case, the
adjustment value for the reference tool is zero.)
It's important to note that adjustment values may
be positive or negative. The value is positive when
the tip is lower than the reference position or
negative when higher than reference position.
☞ P. 62, "4-3 Entering Adjustment Values Yourself"
Adjustment
value C
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