System Operation; Probe Moves - Renishaw MP11 Manuel D'installation Et D'utilisation

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SYSTEM OPERATION

The probe storage area must be clean and provide
complete protection against all forms of dirt, oil
and coolant contamination.
The probe is in effect another tool in the system.
A workpiece set-up or inspection cycle may be
included at any stage in the machining cycle.
When a probing routine is required, the operator
first inserts the probe in the machine spindle, and
then plugs the power cable into the probe body.
Ensure the probe LED is lit, with the stylus seated
before commencing a probe routine.
Probing may now commence. A probe routine
is activated by a command from the machine
control.
When probing is complete the operator must first
disconnect the cable from the probe socket.
The free end of the cable should be parked on
a remote socket.
Finally return the probe to storage.
The probe must be kept clean and handled with
care at all times. The probe is sealed for working
in normal conditions, but extra care must be
taken to avoid chips cutting the front seal and
coolant contamination of the plug.

PROBE MOVES

A probe trigger signal is generated when the probe is
in the operating mode and the stylus is driven against a
surface. The machine control records the probe contact
position and commands machine motion to stop.
High probing speeds are desirable, however a probing
velocity must be chosen which allows the machine to
stop within the limits of stylus overtravel. Follow feed
rate guidelines given by supplier.
To ensure a trigger signal is given, drive the probe
against the workpiece to a target beyond the expected
surface, but within the limits of stylus overtravel.
After the probe stylus touches the surface, reverse clear
of the surface.
Probe gauging move should be made at constant speed.
Single and double touch
If the probe operating sequence is based on a single
touch, then the probe may be returned to its start point,
following a gauging move.
With some types of controllers, it is an advantage
to use the two touch method. The first move finds the
surface quickly. Then the probe is reversed to
a position clear of the surface, before making the
second touch at a slower feed rate, thereby recording
the surface position at a higher resolution.