Specifications

192-040011 N18
Cutting on the fly
Automation
19
Parker Hannifin GmbH
Electromechanical Division
COMPAX XX50: cutting on the fly
Function not available with the COMPAX 1000SL! Implement this function with the electronic cam control.
Continuously driven saws and shears, con-
tinuous processing
A saw carriage is attached parallel to the direction of
material flow. This is accelerated to the speed of the
material to be processed and then travels at the
same speed as the material. If the relative speed
between material and saw carriage is zero, synchro-
nous running has been achieved. COMPAX will re-
port this state via a digital output. Now the cutting
process is performed by running the cutting tool
across the direction of travel at right angles. Syn-
chronous running is ended via a digital input and the
carriage stops. The carriage then moves automati-
cally (or in a defined manner) to its initial position or
to a predetermined position. The saw then waits until
the material feed has travelled the distance corre-
sponding to the cut length.
Angled beam saw
A derivative of the continuously driven saw is the an-
gled beam saw, used for wide materials. Here, the
saw guide (the linear axis) lies at a fixed angle above
the material to be cut. The saw blade is at right an-
gles to the direction of material travel. If the saw is
moved, this results in a saw movement in the direc-
tion of material travel. This movement depends on
the angle between the saw guide and material. The
control system uses the beam angle to calculate the
saw's feed speed so that synchronicity is set be-
tween the saw blade and material. The relative
speed therefore becomes zero. Once the cutting
process is complete, the saw is raised and returned
to its waiting position.
Mark-related machining (registration)
In some applications, the material feed is not con-
tinuously measured but a measurement is taken
whenever a mark made on the material is reached.
The longitudinal measurement then only begins once
the mark has been detected and this has been
communicated via a COMPAX input.
Reject length, chaff length
With increasing material speed, longer machining
times and decreasing cut lengths, the drive spends
increasingly less time in the waiting position. If this
waiting time approaches zero, then the control unit
switches to a substitute length, commonly known as
the reject length. COMPAX reports this state via an
output. If compliance cannot be maintained with the
reject length, which is normally greater than the
standard dimension, the control unit switches into
chaff mode. This is the minimum length which can be
cut.
Manual cutting
When cutting manually, synchronisation is started di-
rectly from the waiting position. In such instances,
the specified length is not taken into account.
Head cut - initial machining
Special provision is made for handling the first syn-
chronisation request after a START signal is re-
ceived.
Material simulation
During the start-up phase, when there is usually no
material available, the material speed can be simu-
lated using a parameter or a potentiometer on the
override input.
Further examples of machining processes while
in motion:
• stamping • filling • screwing • pouring • drilling
Special inputs and outputs:
E13:manual cutting
E14:mark signal valid
E15:end of synchronous travel
E16:mark input
A14:synchronous comparator
A15:reject length too small
A16:reject length
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