NEW FEATURES
(SOFT M: 9.0X)
CNC 8055 / CNC 8055i
Page 28 of 106
6 Additive coupling between axes
A typical application of additive coupling is on milling machines where
the Z axis has a second axis W coupled to it that moves by hand. This
allows operating manually on the Z component through that axis.
This way, the Z axis movements are defined by two axes. One
motorized, whose parameters are defined in the Z axis parameters
and the other one (dro) whose parameters are defined in the W axis.
The CNC screen shows, in the Z axis coordinates, the sum of both
feedbacks Z+W. The coordinates of the W axis may be displayed
either as a separate axis or may be set to be hidden (not displayed).
Likewise, the graphics show the Z axis as the sum of Z+W.
The additive coupling may be applied on any pair of axes, but only one
pair of axes may be defined in an additive coupling. An additive
coupling is not possible with the spindle.
Operation in jog mode
The W axis may be moved manually without affecting the Z axis. The
Z axis display shows the sum of both axes.
When moving the Z axis, it moves up to the software limits of the Z axis
taking into account the W axis position at the time.
Operation in the other modes (execution, etc.)
The W axis movements may be compensated on the Z axis via PLC.
This is done by adding, in the PLC, the feedback increments of the W
axis to the PLCOFZ variable.
The CNC always monitors the software limits of both axes separately.
If any of the limits is exceeded, it will issue the corresponding error on
the Z or W axis.
It also monitors the software limits of the Z axis when programming
a movement either in execution or in JOG mode. In other words, when
moving the Z axis in JOG, it moves up to the software limits of the Z
axis taking into account the W axis position at the time.
Home search
To carry out a full home search, do a home search on both axes
separately.
• Z axis home search. When detecting the marker pulse, the Z axis
display shows the "REVALUE" of the Z axis plus the position of the
W axis. The PLCFZ variable is set to zero. The W axis is not
involved in the home search.
• Manual W axis home search. When detecting the marker pulse,
the W axis display shows the "REVALUE" of the W axis. The Z axis
display shows the Z axis position plus the "REVALUE" of the W axis
plus W axis position.
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