Danfoss MCO 305 Design Manual page 44

MCO 305 Design Guide
Activate the diagram of the →
see the corresponding velocity curve as it is
shown in this figure:
8. Enter the → Cycles/min Master = 20 in the
index card → Curve Info. This is the (maxi-
mum) number of cardboard boxes that can be
processed per minute.
9. Verify whether the acceleration of the slave is
within the limit. For this purpose, you must
activate the illustration of the →
and of the → Acc. Limit.
10. Define in the list → Start-Stop Points with
some safe distance in order to start the syn-
chronization at the beginning. Engaging should
take place between 20 and 100 degrees
because it must be completed at 120 degrees.
11. In the index card → Curve Data, define the position where the conveyor belt should stop if no other
Slave Stop Position is being defined in the program:
The conveyor belt should always stop in position 0:
Slave Stop Position = 0
12. The photoelectric beam (external marker) has a distance of 390 mm from the processing point (=
stamp touches the box) and detects the beginning of the box (corresponds to slave position 1000).
Thus, the marker distance is 3900. Enter this value in the index card → Synchronization and define the
permitted tolerance for the appearance of the markers and the external marker type = 2 for the slave:
Par. 33-18
Par. 33-22
Par. 33-20
Enter the master position in the index card → Curve Data:
Slave-Marker-Position = 1000
13. Take a look at the curve profile in order to determine when the correction of the synchronization may
begin at the earliest and when it must be finished. The green horizontal line indicates 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 cardboard box has been completed,
since any change of velocity during the printing process would damage the printing stamp and/or the
box. Also, the correction must have been completed in its entirety when the next box arrives at the
processing point. In this example, the slave positions at the end and beginning of a box are quite
suitable. Enter the values in the index card → Curve Data:
Correction Start
Correction End
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.
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.
44
__ Functions and Examples __
Velocity to
Acceleration
Slave Marker Distance
Slave Marker Tolerance Window
Slave Marker Type
= 2800
= 750
Velocity and of the →
Acc.-Limit.
®
MG.33.L5.02 – VLT is a registered Danfoss trademark
= 3900
= 200
= 2
Vel.-Limit and then the illustration of