Rockwell Automation GMLC Reference Manual - Manual (Page 319)

Publication GMLC-5.2 - November 1999
282 Motion Blocks
To scale a position-lock cam profile, select Scale Profile and enter the
desired total master distance (in the position units of the master axis) and
total slave distance (in position units of the slave axis) over which the
profile is to be executed.
Increasing the total master distance of a cam profile decreases the
velocities and accelerations of the profile, while increasing the total slave
distance increases the velocities and accelerations of the profile. To
maintain the velocities and accelerations of the scaled profile
approximately equal to those of the unscaled profile, total master distance
and total slave distance should be scaled in proportion to one another. For
example, if the total slave distance of a profile is doubled by scaling, the
total master distance should also be doubled to maintain approximately
equal velocities and accelerations during execution of the scaled position-
lock cam.
To scale a
profile only in:
Do this:
Master distance Enter a total slave distance equal to the distance
moved by the slave axis when the profile is
executed without scaling (as implied by the
defined profile in the slave cam table).
Slave distance Enter a total master distance equal to the distance
moved by the master axis when the profile is
executed without scaling (as implied by the
defined profile in the master cam time table).
!
ATTENTION: Decreasing the total master distance or
increasing the total slave distance of a position lock cam
by scaling increases the required velocities and
accelerations of the profile. This causes a motion fault
if the capabilities of the drive system are exceeded.