Rockwell Automation Publication 2198-UM004A-EN-P - October 2019 333
Motion Control Applications Chapter 12
E-Cam
E-Cam is the built-in function in Kinetix 5100 series servo drive. Its advantages
are the following:
• Increase the power efficiency - Without the friction among machinery
parts, it reduces the power consumption.
• E-Cam shape is easy to change - E-Cam shape can be changed simply by
modifying the E-Cam curve.
• Machinery maintenance - It is simulated by software.
• Wide range of application - E-Cam software is applicable to any
application which is required to use E-Cam curve.
• Flexibility - One master axis can command several slave axes. It would be
more difficult when doing it by machine cam.
With built-in E-Cam function, the configuration software stabilizes the control
system and enables the servo drive to complete motion control command, such as
synchronous conveyor, flying shear and rotary cut.
The E-Cam uses the mathematical equations to plan the motion path between
Master Axis and Slave Axis. It cannot only replace the mechanical cam, but also
break the shape limit of mechanical cam. The electronic cams can be used as long
as they are master-slave control and can find the mathematical equations of the
master-slave position relationship. Mechanical cam and electric cam is illustrated
in Figure 157
.
Figure 157 - Mechanical Cam and E-Cam
The E-Cam function can be used only in PR mode (ID117 (P1.001.YX) = 1).
The slave axis operates according to the cam curve, and the position of the slave
axis is a function of the position of the master axis. The master axis transmits
pulses to the slave axis, and the slave axis operates according to the cam curve
corresponding to the received master axis pulses, shown in Figure 158
. The E-
Cam function can be enabled or disable by setting parameter ID376 (P5.088.X).
When the E-Cam function is turned on, the drive judges the time to engage the
clutch. Figure 159
uses the mechanical cam concept to illustrate the E-Cam
parameter settings.
(1) - Mechanical Cam and E-Cam
(2) - Master Axis Input
(3) - Mechanical Cam
(4) - Slave Axis Output Pulse Input
To Next Page
Loading...
