Fagor 8025 GP, Operating Manual

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122 8025/8030 CNC PROGRAMMING MANUAL
6.30.2. CHARACTERISTICS OF DIGITIZING WITH THE FAGOR 8025/30 MS
CNC
Any digital probe can be used with the 8025/30 CNC.
During the digitizing phase, a simple program moves the probe on the pattern. The exploration
can have the form of a rectangular grid, concentric circumferences, spiral, diametric, etc.,
so that it adapts as well as possible to the geometry of the model to be reproduced. It is also
possible to define various areas and use a different exploration method in each of these.
One very important difference of the FAGOR digitizing method with respect to other systems
which also use digital probes is that this one moves practically on the surface of the pattern.
. ADVANTAGES OF THE FAGOR METHOD
Less time is needed for the digitizing stage.
It can be used in large machines, even though the axis which moves the probe is very heavy,
as it is not submitted to continuous rocking movements which could damage its mechanism.
After the data has been collected a program is generated which can be stored in the memory
of the MS 8025/30 CNC or in the disc of a computer, by using the FAGORDNC communication
system. This second option is the one used normally, as the programs which are generated by
digitizing are usually of a large size than the memory capacity of the control (32 Kb).
If the pattern has any type of symmetry, only one part can be digitized and then, by applying
mirror images 9G11, G12, G13), transfers (G92, G53 .... G59) and axis turns (G73), the
complete pattern can be reproduced. This allows a reduction both in the digitizing time and the
length of the program.
Reproduction can be obtained with smoothed paths if, instead of going from one point to
another in a straight line (G1), G8 functions are used (Tangent circumference to the previous
path) and G9 (circumference defined by three points).
The application of scale factors (G72) allows a complete family of parts to be made from a
single pattern.