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OPTIONS
June 1999
11.6 FIFTH AXIS CONTROL
This section describes the features of a HAAS five-axis control.
THE C OORDINATE S YSTEM
The layout of the A and B axes on the HAAS five-axis control are depicted below. The A axis is rotary motion
about the X axis, while the B axis determines rotary motion about the Y axis. The right hand rule can be used
to determine axis rotation for the A and B axes. When placing the thumb of the right hand along the positive X
axis, the fingers of the right hand will point in the direction of tool movement for a positive A axis command.
Likewise, when placing the thumb of the right hand along the positive Y axis, the fingers of the right hand will
point in the direction of tool movement for a positive B axis command. It is important to remember that the
right hand rule determines direction of tool movement and not the table movement direction. For the right hand
rule, the fingers will point opposite of the positive rotary table movement. Refer to Figures 11-14 and 11-15.
Fig. 11-14. Work coordinates (Positive direction).
Fig. 11-15. Table movement (Positive command).
Note: Figures 11-14 and 11-15 represent one of many possible machine tool and
table configurations. You may have different table movements for positive
directions, depending on the equipment, parameter settings, or five-axis
software being used.
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