Lenze EVS93xx CrossCutter - Manual (Page 36)

Cross Cutter
Features of the "Cross Cutter" prepared solution
 Prepared Solution Servo PLC / ECSxA 1.1 EN 2-22
Reject operation
In practice, sections of material have to be cut into small pieces in order to be disposed of, for
example, in a waste container. Reject operation of this type is required when threading new
material or cutting out damaged sections of material. Here too, the user is once again able to
define parameters for this application separately. A dedicated calculation block is available for
calculating motion profiles for reject operation. Two basic cams are reserved for calculating
reject cutting lengths in "Reject operation" mode. This ensures that the user can be calculating a
new reject cutting length in the background whilst continuing to cut to a different reject cutting
length. Once the new reject cutting length has been calculated, the corresponding motion cam
can be preselected with the calculated functions and replace the old reject cutting length as
soon as the current cut has been completed. "Reject operation" mode can only be length-
controlled (see Chapter 2.5.6). You can switch from "Continuous cutting" and "Test operation" to
"Reject operation" without first having to stop the system. This means that it is possible to cut
reject sections from the material flow during operation. You must stop the system first in order to
switch to "Reject operation" from "Asynchronous cross cutter" mode. The system activates
reject gate control as soon as "Reject operation" is selected (see Chapter 2.5.12).
Figure 5: Example representation of reject cut operation