
Chapter 3
Offset Tables and Setup
3-2
Figure 3.1
Wheel length Offsets
Wheel gauge pointonspindlefromwhich
wheel offsetsare usuallymeasured
(determined by your system
installer)
Wheel lengthoffsets simplify
programming and allow processingfrom
differentpoints on thewheel without
changingthepartprogram
Xlength
offset
Z length
offset
These lengthoffsetsselectthis point as
thecontrol pointfor programmi ng
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Resolution of wheel radius and length offset data is determined by the
programming resolution selected for the axis in AMP. For example, an X
axis that can be programmed with 4 decimal place accuracy also allows 4
decimal place accuracy in the offset tables.
Figure 3.1 illustrates typical cylindrical grinder length offsets. Length
offsets for a surface grinder application can be more complex as additional
axes can be offset.
Wheel LengthOffset Numbers
Call out wheel offset numbers in a program through use of the T word.
The last t wo digits of the T word specify an offset number for wheel
length. This number is independent of the dresser/wheel radius and
orientation offset number which is the first two digits of T word. The
control then accesses the values assigned to that offset number in the wheel
length offset table. Length offsets are activated as described in chapter 13.
You can store valid wheel lengths for each axis by using offset numbers
ranging from 01 to 32. You cannot use offset number “00” to store wheel
offset data but you can program “00” to cancel wheel length offsets. You
can call different of fset numbers from the wheel geometry and wheel
radius table using the same T word.
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