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4. Concepts of the cam disc
54
Festo.P.BE-CMMP-CAM-SW-EN en 1105a
4.12.3
CAM-IN
A CAM-IN movement is always executed when, during activation of a cam disc, the slave
axis is not at the Y-value at which it should be according to its cam disc and according to
the X-value of the control through the master.
For the CAM-IN movement, the settings are used that can be made in FCT on the “Cam
Discs” page in the “CAM-IN” tab:
To indicate that the drive is in a CAM-IN movement, this signal can be mapped via FCT onto
digital outputs (“Digital Outputs” page). In this way, it can also be signaled that the drive
has reached the curve starting point (CAM-IN movement completed).
If the drive moves when a cam disc is deactivated, braking takes
place with the deceleration (brake ramp) that was set with the
CAM-IN parameters.
If the drive leaves the defined master period of the cam disc, the
drive is also braked (brake ramp not parametrisable).
For the virtual master:
If a positioning record is started during a CAM-IN movement, the CAM-IN movement is run
to the end. The started positioning record is then executed without the need for a new
START signal.
For a combination of physical master and a slave:
Note
A cam disc should only be activated when the master is at rest!
If the master moves during activation, this can result in setpoint
jumps and following errors.