Lenze EVS93xx FlyingSaw - Manual (Page 19)

FlyingSaw
Features of the Prepared Solution
 Prepared Solution Servo PLC / ECSxA 1.1 EN page 2-6
The start signal for synchronising can be generated in two ways:
• Cutting mark control:
A sensor, e.g. a photoelectric barrier, registers the cutting marks
present on the material. This sensor signal is processed as an
interrupt in the inverter and starts the sawing process. This method
is used if there are cutting marks on the material which have to be
referred to, e.g. when using printed materials.
• Cutting length control:
An encoder on the material registers the material speed of the
production process. This information is processed by the controller.
Cutting marks on the material are not required. The cutting length
control provides equidistant cutting lengths. The advantage of cutting
length control is that no cutting marks are required on the material. A
length calculator calculates equidistant lengths in the controller and
generates a start signal for the synchronising process.
The synchronising process either started by cutting mark or cutting length control can be synchronous or
oversynchronous:
• Oversynchronous:
The "Flying saw" moves faster than the material/belt during the
synchronising process. It starts exactly at the cutting position and
catches up with all increments made during the synchronising
process. Then the saw axis has achieved angular and rotational
speed synchronism and switches the synchronised signal. Then the
machining process can be started.
V
Material- / Bahn-
geschwindigkeit
Sägegeschwindig-
keitsverlauf
t
t
Synchron-Signal
V
Material- / Bahn-
geschwindigkeit
Sägegeschwindig-
keitsverlauf
t
t
Synchron-Signal
line-speed
sync-speed
synchronous-
signal