HEIDENHAIN IK 5294 - Manual (Page 102)

82 QC5200 Series User’s Guide
Specifying CNC probing parameters
CNC probing parameters can be specified for optical edge detectors to control CNC probing and
non-probing velocities during program execution, and data point approach and search distances. To
specify the probing param-
eters, select the Edge probe
and click the Probe Path
Data menu item to display
the Probe Path Data dialog
box.
Probe velocity
The probing and non-probing (probe transition)
velocities are entered into the Velocity Factor
fields. The probing velocity is specified by en-
tering a percentage of the maximum CNC veloc-
ity into the Probing % field. The non-probing or transition velocity is specified by entering a percentage
of the maximum CNC velocity into the Non-Probing % field.
NOTE
The maximum CNC velocity is specified in the Tools/CNC/Axis setup screens. Refer
to Chapter 10: Supervisor Setup for details.
In general, the best probing accuracy is obtained at lower and at constant probing velocities. However,
since the system is accurate at higher velocities, the major velocity consideration is related to the torque
required to perform high acceleration and deceleration moves, and the resulting measurement errors.
Approach and search distances
The probing velocity is maintained over the approach distance to the target data point. The approach
distance should be large enough to allow the system to reach a constant probing velocity, and small enough
to facilitate rapid measurement. The search distance extends the probe’s travel in the event that the target
data point is not found where it was expected. The search distance should be large enough to make the
system less sensitive to acceptable target position variations and small enough to produce an error message
when the target is outside acceptable position variations. The approach and search distances are specified
by entering the desired values into the appropriate Distance fields.
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