HEIDENHAIN ND 1300 OED and Crosshair Systems - Manual (Page 62)

44 QC-300 Series User’s Guide
Probes
Edge detector and crosshair probes can be used to collect data points for feature measurements. Both
probe types include manual and automatic point entry func-
tions. Touch the Probe button icon to select a probe.
Edge detector probes
Optical edge detection recognizes light to dark and dark to light edge transitions on projector-based sys-
tems. Each edge transition is recognized as a point by the QC-300. Edge detection point entry can be
automatic or manual.
Automatic point entry
When automatic point entry is used to measure features, a point is entered when an edge is
crossed. It is not necessary to press the Enter key to enter the point.
Manual point entry
When manual point entry is used to measure features, a point is stored in a temporary memory
location when the edge is crossed. This point is replaced with a new point each time a new edge
is crossed. The most recent point is entered as part of a measurement when the Enter key is
pressed.
Crosshair probes
Crosshair probes must be positioned precisely over part features to collect feature data points. Crosshair
point entry can be automatic or manual.
Auto-enter optical edge detection
Points are entered automatically when edges are crossed
Manual optical edge detection
Points are entered by pressing the Enter key after edges are crossed
Auto-enter crosshair
Points are entered automatically when the stage is moved to a new position
and then remains motionless for a short time
Manual crosshair
Points are entered by pressing the Enter key after positioning the crosshair