
1.AXIS CONTROL B-63943EN-1/02
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- Helical gear compensation
For a helical gear, the workpiece axis is compensated for the
movement along the Z-axis (axial feed axis) based on the torsion angle
of the gear.
Helical gear compensation is performed with the following formulas:
Compensation angle = ×360 (for metric input)
Compensation angle = ×360 (for inch input)
where
Compensation angle: Signed absolute value (deg)
Z : Amount of travel on the Z-axis after the specification of
G81
P : Signed gear helix angle (deg)
π : Ratio of the circumference of a circle to its diameter
T : Number of teeth
Q : Module (mm) or diametral pitch (inch-1)
Use P, T, and Q specified in the G81 block.
In helical compensation, the machine coordinates on the workpiece
axis and the absolute coordinates are updated with helical
compensation.
QT
sin(P)
××
×
π
Z
T
sin(P)QZ
×
××
π