Roland MODELA Pro II ZCL-540, User Manual

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68 Chapter 7 Appendix
7-3 NC Code Specifications
Items Related to the Mechanical Specifications
This section describes the NC codes that are dependent on
the machine's mechanical specifications.

"NC Code Reference Manual"
Dimension word (A)
Dimension word A becomes available when this unit is in-
stalled. Specifying all four (X, Y, Z, and A) in a single block is
possible (simultaneous four-axis feed).
A-axis minimum unit of movement
The minimum unit of movement for this unit is 0.01 degrees.
The unit of measurement for angles is 0.01 degrees when
no decimal point is used, or degrees when a decimal point
is present.
A-axis coordinate range (a)
The range for parameter a is as follows. Parameter a is used for
positioning (G00), linear interpolation (G01), data setting (G10),
and the coordinate system (G92). The unit of measurement
for angles is 0.01 degrees when no decimal point is used, or
degrees when a decimal point is present.
Parameter: a
Acceptable range:
-2,147,483,647 to 2,147,483,647 (no decimal point)
-2,147,483.647 to 2,147,483.647 (decimal point present)
Effective range: Maximum cutting area
A-axis feed rate (F)
The valid parameter range for F is 30 to 7,500 mm/min (1.2
to 295.2 in./min), regardless of whether the A axis is present.
Note that the feed rate for the A axis is also specified as mil-
limeters (or inches) per minute. The actual speed of rotation is
determined by the specified F code and the tool position, but
cannot exceed the unit's operating speed (20 rpm).
A-axis Movement Commands and Actual Operation
The operating range of the A axis is approximately ±5,900 turns
(±2,147,483.647 degrees). Angles of 360 degrees or higher
are recognized during execution of a single NC program. For
instance, executing an absolute specification of G01A720.0
performs two full rotations. Also, executing G01A0.0 performs
rotation of two turns in reverse. Note, however, that the co-
ordinate view in VPanel and on the handy panel is from 0 to
359.99 degrees. The display of any angle of 360 degrees or
higher is truncated.
An angle of 360 degrees or higher is truncated when execution
of an NC program has ended or during standby (that is, when
performing manual feed). For example, if an NC program ends
with the For example, at a location of 750 degrees and manual
feed for movement to an A-axis coordinate of 0 degrees is
then performed, the result is a return not by 750 degrees,
but by 30 degrees.