Haas Automation UMC-1000, Дополнение к руководству оператора

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G254 - Dynamic Work Offset (DWO)
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Chapter 5: G254 - Dynamic Work Offset
(DWO)
5.1 G254 - Dynamic Work Offset (DWO) (Group 23)
G254 Dynamic Work Offset (DWO) is similar to TCPC, except that it is designed for use
with 3+1 or 3+2 positioning, not for simultaneous 4- or 5-axis machining. If the program
does not make use of the tilt and rotary Axes, there is no need to use DWO.
CAUTION: The B-Axis value of the work offset you use with G254 MUST be zero.
With DWO, you no longer need to set the workpiece in the exact position as programmed
in the CAM system. DWO applies the appropriate offsets to account for the differences
between the programmed workpiece location and the actual workpiece location. This
eliminates the need to repost a program from the CAM system when the programmed and
actual workpiece locations are different.
The control knows the centers of rotation for the rotary table (MRZP) and the location of the
workpiece (active work offset). This data is used to produce the desired machine motion
from the original CAM-generated program. Therefore, it is recommended that G254 be
invoked after the desired work offset is commanded, and after any rotational command to
position the 4th and 5th axes.
After G254 is invoked, you must specify an X, Y, and Z Axis position before a cutting
command, even if it recalls the current position. The program should specify the X- and Y
Axis position in one block and the Z Axis in a separate block.
CAUTION:
Before rotary motion, use a G53 Non-Modal Machine Coordinate
motion command to safely retract the tool from the workpiece and
allow clearance for the rotary motion. After the rotary motion finishes,
specify an X-, Y-, and Z-Axis position before a cutting command, even
if it recalls the current position. The program should specify the X- and
Y-Axis position in one block and the Z-Axis position in a separate
block.
CAUTION: Be sure to cancel G254 with G255 when your program does
simultaneous 4- or 5-axis machining.