Lenze EVS93xx FlyingSaw - Manual (Page 43)

FlyingSaw
Functions
 Prepared Solution Servo PLC / ECSxA 1.1 EN page 3-30
3.6 Automatic operation: length-controlled operation
When the flying saw is operated with length control, equidistant pieces of material are
processed. This means that the length calculator calculates the lengths as a function of the
master speed and generates the start signal for synchronising. The main feature of length-
controlled operation is that there do not need to be any marks on the material to achieve exactly
the same lengths.
The length-controlled cut is started with a top cut triggered by the operator. The length
calculator then calculates the start signals for synchronising based on the required length
entered and the master speed.
Top cuts / immediate cuts result in the immediate synchronisation of the flying saw. Subsequent
cuts keep exactly to the required cut length set, as this interrupt is taken into account in the
application.
3.7 Automatic operation: mark-controlled operation
When the flying saw is operated with mark control, cuts are made at marks applied to the
material. In this case the distance between mark detection and the initial position of the flying
saw must be measured and entered in the application so that the cut or the processing can take
place exactly at the position of the mark.
If the marks are distributed equidistantly on the material, the length calculator can monitor
whether a mark has been detected or not. If this a mark is not detected, the length calculator will
"force" a cut. The forcing of the cut and the length of the forced cut must be set in the
application.
3.7.1 Mark checking
When the flying saw is operated with mark control it is possible to check the distances between
the marks. For this purpose the specified length between the marks is entered and, if a mark is
not detected, the length calculator stats the synchronising process. The failure to detect a mark
can result in continuous material being too long for subsequent processes and machine
damage cannot be excluded. Mark monitoring is activated using the code C3017/000.
3.7.2 Simulation of the master speed
The simulation of the master speed makes it possible to operate the flying saw axis without a
real master value on interface X9. For this purpose an incremental value in the unit [inc/ms] is
defined in the code C3010/000 simulation of the master speed. The simulation is activated in
the application control word using the Select master frequency bit [default bit 20). If the bit is set
there, the master value from code C3010/000 is processed in the project. If the bit is not set, the
interface X9 is processed in the project.