Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 466)

Tool Control Functions
Chapter 13
13-4
Your system installer has the option in AMP to determine exactly when
wheel length offsets take effect and when the wheel position updates on the
screen to the new shifted location. This manual assumes that your system
is configured to immediately shift the coordinate system by the geometry
offset amounts, and delay the actual physical move that re-positions the
wheel in the current work coordinate system. See documentation prepared
by your system installer to determine the method used in your specific
system.
The control activates a wheel length offset when it executes any block that
contains a T word. Your system installer selects the activation type from
the following:
System installer
selects this
activation type:
Resulting in this display change: and this axis motion:
immediate shift/
immediate move position display changes to reflect the
grinding wheel’s new location the control generates a move equal to and opposite
the offset amount on each axis.
immediate shift/
delay move position display changes to reflect the
grinding wheel’s new location the control does not generate the move activating
the offset until a move on the axis is made. Then
the offset amount is applied to the endpoint of the
move. Each axis that has a length offset must be
moved to activate the offset on that axis.
delay shift/
delay move position display does not change to
reflect the offset until axis motion on
the offset axis occurs the control does not generate the move activating
the offset until a move on the axis is made. Then
the offset amount is applied to the endpoint of the
move. Each axis that has a length offset must be
moved to activate the offset on that axis.
Important: If your system installer selects delay move type as the
activation type, the control cannot activate wheel offsets in a circular block
(G02 or G03). In this case, the control generates an error if you program a
circular move in the same block, or as the first motion block immediately
following the T word.
If the activation type is immediate shift /immediate move, the control
generates its own linear blocks to activate the offset. In this case, you can
program the T word in a circular or linear block. The control activates the
offset before the moves in that block take place.
13.1.2
Activation of Wheel Length
Offsets