
PROGRAMMING20. AXIS CONTROL FUNCTIONS
B–64124EN/01
408
When the angular axis makes an angle other than 90° with the
perpendicular axis, the angular axis control function controls the distance
traveled along each axis according to the inclination angle. A program,
when created, assumes that the angular axis and perpendicular axis
intersect at right angles. However, the actual distance traveled is
controlled according to an inclination angle.
+Y
+Y Coordinate system actually used
(Angular axis)
Program coordinate system
+Z (Perpendicular axis)
θ
θ : Inclination angle
When the angular axis is the Y–axis and the perpendicular axis is the
Z–axis, the amount of travel along each axis is controlled according to the
formulas shown below.
The distance traveled along the Y–axis is determined by the following
formula:
Ya=Yp/cosθ
The distance traveled along the Z–axis is corrected by the inclination of
the Y–axis, and is determined by the following formula:
Za=Zp–Yp*tanθ
The speed component along the Y–axis is determined by the following
formula:
Fa=Fp/cosθ
Ya, Za, Fa : Actual distance and speed
Yp, Zp, Fp : Programmed distance and speed
The angular and perpendicular axes for which angular axis control is to
be applied must be specified beforehand, using parameters (No. 8211 and
8212).
Parameter AAC (No. 8200#0) enables or disables the inclined axis
control function. If the function is enabled, the distance traveled along
each axis is controlled according to an inclination angle parameter (No.
8210).
Parameter AZR (No. 8200#2) enables angular axis manual reference
point return only with a distance along the angular axis.
By setting the normal axis/angular axis control invalid signal NOZAGC
to 1, slanted axis control only for the angular axis can be available.
In this time the angular axis are converted to those along the slanted
coordinate system without affecting commands to normal axis.
An absolute and a relative position are indicated in the programmed
Cartesian coordinate system.
20.3
ANGULAR AXIS
CONTROL
Explanations
D Method of use
D Invalidity of normal axis
D Absolute and relative
position display