Aerotech UNIDEX 600 Series, Руководство пользователя

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U600 User’s Guide Parameters
Version 1.4
Aerotech, Inc.
C-13
C.2.19. CAMADVANCE
This axis parameter is used only for electronic gearing, File Driven Camming and
HANDWHEEL camming. It serves the same function as the CAMOFFSET axis
parameter, except that instead of shifting the master position by a constant value, it shifts
it proportional to the velocity of the master axis. Its intended use is to compensate for
following error on the slave axis. The value shifted by the CAMADVANCE axis
parameter is in addition to the shift value applied by the CAMOFFSET axis parameter,
and is:
Shift value = Master velocity (cnts / msec) * CAMADVANCE / 8192
This parameter is without units, and its value may be negative. It is set for the slave axis.
This parameter should always be set before SYNCing the axis in a non-zero mode.
This parameter value is added to the master position before doing the cam table lookup. It
is used to shift, or offset the relationship between the master and slave positions, as
defined in a cam table (Figure C-3, Camming Illustration). This allows you to shift the
curve left or right, without writing a new cam table.
C.2.20. CAMOFFSET
This axis parameter is used only for electronic gearing, Camming from a File and
HANDWHEEL camming. The value of this axis parameter is added to the master position
before doing the cam table lookup. It is used to shift, or offset the relationship between
the master and slave positions, as defined in a cam table (see Figure C-3, Camming
Illustration). This allows you to shift the curve left or right, without writing a new cam
table.
This parameter is in counts, and may be negative. It is set for the slave axis, in respect to
the units of the master axis (see Figure C-3 below). This parameter must be set before
SYNCing the axis to a non-zero mode.
For example, suppose the master axis is X, and the slave axis is Y. Furthermore, suppose
that the X-axis has 10,000 counts/inch, and the cam table specifies that at a master
position of 3 inches, the slave must be at position “s”. If instead, you want a master
position of 1 inch to correspond to slave position “s”, then set the CAMOFFSET value to
(10,000 counts/inch)/(3-1 inches) = 5,000 counts:
CAMOFFSET.Y = 5000
Master Position
Slave
Position
CAMOFFSET
(negative value)
With the CAMOFFSET value
Without the CAMOFFSET value
Figure C-3. Camming Illustration