Specifications

192-040011 N18
Electronic cam control
Automation
22
Parker Hannifin GmbH
Electromechanical Division
Cam control functions
The primary task
The control unit's primary task is to move a slave
axis in accordance with the profile of motion pro-
grammed by the user and depending on the angle of
the master axis. Several slave axes with individually
programmed profiles can be coupled to the master
axis.
Slave
Master
Slave
(length)
Master
(angle)
90°
180° 270°
360°
Coupling and decoupling the slave axis
The slave axis can be coupled and decoupled in
several ways.
Coupling and decoupling at standstill
The simplest way to initialise the axis is by perform-
ing a homing routine after the power has been ap-
plied. Once the system has been started externally,
COMPAX automatically selects the cam required
and is ready to follow the master axis. The master
axis usually now starts its running move. The slave
axis runs in accordance with the movement relation-
ship entered.
Coupling and decoupling while master axis is ro-
tating
The following options are available for coupling on a
rotating master axis:
• When the external "couple" control signal is re-
ceived, the slave axis starts up, then moves down
the stored profile, starting from the programmed
synchronous position (M
S
). Decoupling occurs in
the same manner.
•
slave
master
coupling
signal
M
S
S
0
When the
external "couple" signal is received, the slave axis
only starts up once the master axis has also reach
the programmed coupling position (M
E
). The slave
axis moves from the specified synchronous posi-
tion and does so synchronously with the master
axis. Decoupling occurs in the same manner, i.e.
the slave axis at the decoupling position (M
A
) exits
synchronous mode and slows down at the braking
position (M
B
) to come to rest at S
0
.
slave
master
S
0
M
E
M
S
coupling
signal
The option of dynamic cam changeover also
allows for the implementation of individual
coupling and decoupling operations.
Programmable cam cycles
You can determine whether the slave axis should
continually follow the master axis or whether the
coupling to the master axis should be ended after a
defined number of cam cycles.
Lag warning
You can monitor the variation between the actual
position and the programmed profile by means of a
preset "lag warning". COMPAX will generate an out-
put signal whenever this value is exceeded.
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