Danfoss MCO 305 Design Manual page 40

MCO 305 Design Guide
13. Take a look at the curve profile in order to
determine when the correction of the synchro-
nization may begin at the earliest and when it
must be finished. The vertical green line indi-
cates the master position where the marker is
recognized, the light green area shows the
tolerance window for the appearance of the
master marker.
At the earliest, the correction may begin when
the printing of a box has been completed,
since any change of velocity during the
printing process would damage the box. The
correction must be finished completely when
the next cardboard box reaches the processing
point.
In this example, the master positions at the end and beginning of a box are quite suitable:
Correction Start
Correction End
is shaded in blue in the curve profile.
14. Verify whether the velocity and acceleration of the slave remain within the limit. For this purpose, you
must activate the illustration of the →
the → Acceleration and of the →
15. Click the "Save as" button to save the .zbc file, for example "marker".
16. Load the .zbc file with the modified parameters and the – automatically generated – curve arrays into
the FC 300 by means of Parameters → Restore from file.
Program Example: Synchronization with Marker
Since the curve is stored internally as an array, the DIM instruction must appear first in your program:
/******** Printing of Cardboard Boxes with Marker Correction (Synchronization with Marker) ******/
DIM marker[112]
HOME
// Afterwards, the slave will be in the zero position (0 degrees)
// (Omitted if an absolute encoder is used)
SETCURVE marker
dist = GET SYNCMPULSM
DEFMCPOS (1000-dist)
SET SYNCMSTART 2000
// until the next edge comes from the sensor
SYNCCMM 0
SYNCCSTART 1
// Synchronous operation
WAITI 4 ON
SYNCCSTOP 2 0
40
__ Functions and Examples __
= 3000
= 1000Enter the values in the index card → Curve Data; the depiction of the area
Velocity and of the →
Acc.-Limit.
// Number of elements from the title bar of the CAM-Editor
// Slave axis performs a home run (switch for zero position on top)
// Set stamp curve with marker
// Distance to sensor
// This is the location that corresponds to the sensor signal
// Counting of the master pulse does not begin
// Synchronize in CAM-Mode until motor stop
// Engage roller with start point pair 1
// Wait for input signal when conveyor belt is being switched off
// Disengage roller with stop point pair 1 and stop at position 0 degrees
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Vel.-Limit and then the illustration of