Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 692)

Skip, Gauge, and Probing Cycles
Chapter 27
27-18
Use the Adaptive Depth feature to enable an adaptive depth probe that
monitors tool depth relative to the actual part surface. This feature is
sometimes referred to as “cut to length” or “ cut to depth”. This feature
allows a more flexible part mounting system (small changes to part size or
part mounting do not require reprogramming of the station) and a less
accurate machine drive system (tool position is relative to the part surface
rather than the machine home). The system installer can determine in
AMP if the position loop, for moves that use the adaptive depth feature, is
closed by the axis encoder or the adaptive depth probe.
Spindle
Motor
Adaptive Depth Probe
(encoder output)
Drilling Surface
Z Axis
The should know the following terms which are used throughout this
discussion on adaptive depth:
Term: Definition:
Adaptive Depth Probe This is the mechanical device used to measure the location of an axis relative
to some surface.
Adaptive Depth Axis The controlling axis that is configured to be positioned by the adaptive depth
probe. The adaptive depth probe is typically mechanically connected to the
adaptive depth axis.
Trigger Tolerance for Probe This is the amount of probe deflection necessary to indicate the adaptive
depth probe has fired.
Maximum Probe Deflection This is the AMPed travel limits for deflection of the adaptive depth probe.
This does not include any probe deflection that occurs before the probe fired
is indicated.
Probe Fired This indicates the depth prove has recorded more feedback counts then the
trigger tolerance and these have occurred beyond the probe zero point.
Probe Zero Point This is a location established by touching off the adaptive depth probe to the
part or established at power turn on. It typically aligns the tip of the adaptive
depth probe with the drilling tool tip.
Adaptive Depth Feedback Source This is the device that controls the positioning of the adaptive depth axis.
Typically this is an encoder mounted to the motor shaft for normal moves,
and the adaptive depth probe for moves that use a G26 block.
27.7
Adaptive Depth (G26)