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Feature considerations – Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set User Manual

Page 699

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Skip, Gauge, and Probing Cycles

Chapter 27

27-25

Feature Considerations

This feature:

Used with G26 adaptive depth:

Virtual C Spindle
Cylindrical Interpolation
Corner Radius and Chamfer Programming
All Fixed Cycles (except some transfer line only
cycles)
QuickPath Plus program blocks

Is incompatible with the adaptive depth probe. An error is
generated if one of these features is active or activated
when a G26 block is executing.

Cutter compensation
Part Rotation

Is incompatible with the adaptive depth probe only when
the G26 block is used on an axis in the currently active
plane. An error is generated if one of these features is
active or activated when a G26 block is executing in the
active plane.

Feedrate Clamping

Feedrate clamping occurs as in normal control operation.
During a G26 block an additional feedrate clamp occurs
that limits the following error of the adaptive depth axis
from exceeding the programmed integrand amount.

Scaling

If you choose to use scaling during a G26 adaptive depth
block keep in mind both the programmed endpoint and the
axis integrand word are scaled.

Block Retrace

You can not perform a block retrace on any block that is
executed with the adaptive depth probe fired. Additionally
you can not completely retrace any block that will retrace to
a position that results in the adaptive depth probe being
fired. Attempting to retrace one of these blocks will stop
motion once the probe fires and generates an error.

Interrupt Macros

You can execute an interrupt macro during a G26 block
provided either:
• the return move does not generate any probe deflection

beyond the zero point

• the blocks in the interrupt macro program do not deflect

the probe beyond the zero point.

If at least one of these constraints is not met, executing the
return move of an interrupt macro will generate a
unexpected probe trip error. You can not execute a G26
block within an interrupt macro.

Block Reset/Control Reset/E-STOP Reset

Performing one of these reset operations will abort any
executing G26 block. If the probe remains depressed
however, any additional G26 blocks use the current probe
position relative to the part surface. You do not need to
re-fire the probe. The probe remains tripped through the
reset operation. Programming another G26 block uses the
current probe deflection to calculate the endpoint from the
executing G26 integrand word. If you require the adaptive
depth probe to re-locate the part surface after a reset
operation, you must first remove any probe deflection
before executing the G26 block.

QuickCheck

When the G26 block is executed in QuickCheck, the
control will not use the integrand word. Axis endpoints will
appear to be at the programmed axis word location. The
probe does not need to fire during QuickCheck.