·294·
Installation manual
CNC 8055
CNC 8055i
7.
CONCEPTS
SOFT: V02.2X
Axes and coordinate systems
7.1.1 Rotary axes
With this CNC, it is possible to select the type of rotary axis by means of axis parameter
AXISTYPE(P0).
By default, their position is always displayed between 0 and 360º (Rollover axis). If these limits are
not to be set, modify axis parameter ROLLOVER (P55).
Although the display is limited between 0 and 360º, the internal count is accumulative. Therefore,
axis parameters "LIMIT+(P5)" and "LIMIT-(P6)" should be set to limit the maximum number of turns
in each direction.
When both parameters are set to "0", the axis can move indefinitely in either direction (rotary tables,
indexers, etc.). See "6.4 Axis parameters" on page 207.
When using leadscrew error compensation, set positions 0° and 360°, first and last point of the table,
with the same amount of error. This way, the CNC will apply the same compensation in all the
revolutions. See "7.5.7 Leadscrew error compensation" on page 328.
Normal rotary axes
They can interpolate with linear axes. G00 and G01 movement.
• Absolute coordinate programming (G90).
The sign indicates the turning direction and the end coordinate the position (between 0 and
359.9999).
• Incremental coordinate programming (G91).
The sign indicates the turning direction. If the programmed movement exceeds 360º, the axis
will turn more than once before positioning at the desired point.
Normal rotary axis AXISTYPE (P0) = 2
Positioning-only rotary axis AXISTYPE (P0) = 3
Rotary Hirth axis AXISTYPE (P0) = 4
ROLLOVER = YES Rotary axis display between 0 and 360º
ROLLOVER = NO No display limits.
Normal rotary axis
AXISTYPE=2
LIMIT+ = 8000
LIMIT- =-8000
ROLLOVER=YES It counts between 0º and 360º.
G90 The sign indicates the turning direction.
G91The sign indicates the turning direction.
ROLLOVER=NO It counts between 7999.9999º and -7999.9999º.
G90 and G91 as linear axis.
LIMIT+ =0
LIMIT- =0
ROLLOVER=YES It counts between 0º and 360º.
G90 The sign indicates the turning direction.
G91The sign indicates the turning direction.
ROLLOVER=NO There are 2 loops, one between 0º and 360º and the other
between 0º and -360º It is possible to switch from one to
the other.
G90 and G91 as linear axis.
LIMIT+ =350
LIMIT- =10
ROLLOVER=YES/NO It can only move between 10º and 350º.
With G90 and G91 like when LIMIT+=8000. An error
message is issued if the target position is beyond the limits.
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