
B–62073E–1/04 2. INTERFACE BETWEEN CNC AND PMC–NA OR NB
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2.3.93 High–precision contour control with 64–bit RISC processor
HPCC mode signal (MHPCC)
[Classification]
Output signal
[Function] Indicates that HPCC mode (high–precision contour control with 64–bit RISC processor) is
currently selected.
[Operation] This signal goes high when the program specifies G05 P10000 (HPCC mode on).
This signal goes low when G05 P0 is specified or HPCC mode is canceled by a reset.
HPCC operation signal (EXHPCC)
[Classification]
Output signal
[Function] Indicates that operation in HPCC mode (high–precision contour control with 64–bit RISC pro-
cessor) is in progress (high–speed, high–precision interpolation is being applied).
[Operation] This signal is high while a command other than G00, M, S, T, and B is executed when G05
P10000 (HPCC mode on) has been specified.
This signal goes low in the following cases:
1 The automatic operation halt state is established.
2 The automatic operation stop state is established.
3 When a G00, M, S, T, or B command is executed.
4 When HPCC mode is canceled.
2.3.94 Interface with a linear scale having reference marks
A linear scale having reference marks is used to obtain the absolute position of the tool based on the intervals
between reference marks (one–revolution signals). Each interval varies from the adjacent interval by a
constant amount. This CNC calculates the absolute position by moving the tool along an axis slightly and mea-
suring the interval between one–revolution signals. The reference position can thus be established without
having to move the tool to the reference position.
Reference mark
Reference mark 1
8.0 42.0 8.2 41.8 8.4 41.6 8.6 41.4
SĄSĄSĄS
SĄSĄSĄS
SĄSĄSĄS
50.0
50.2
Reference mark 2
Fig. 2.3.94 (a) Example of linear scale having reference marks
NOTE This function is optional.
(1) Procedure for establishing the reference position
1 Select JOG mode, then set the manual reference position return selection signal (ZRN) to 1.
2 Set the feed axis direction selection signal (+J1, –J1, +J2, –J2, ...) corresponding to the axis for which
the reference position is to be established to 1, then feed the tool.
3 The tool is fed at the reference position return FL speed (parameter No. 1425).
4 Once a linear scale reference mark has been detected, the tool is stopped briefly, after which feed re-
starts at the reference position return FL speed.
5 Step 4 is repeated until three or four linear scale reference marks have been detected. Subsequently,
the absolute position is calculated, then the reference position established signal (ZRF1, ZRF2, ZRF3,
...) is set to 1.
The timings for the above procedure are shown below.