Danfoss MCO 305 Design Manual page 36

MCO 305 Design Guide
Stamping of Boxes with Use-by Date
The following example explains step by step how to
edit the curve for this application of the CAM con-
trol and then how to incorporate it into your control
program. A roller is supposed to stamp an inscrip-
tion with a length of 10 cm on cardboard boxes.
The stamp corresponds to a roller section of
120 degrees. 60 cardboard boxes are transported
on the conveyor belt per minute. The cardboard
boxes are always transported on the conveyor belt
at exactly the same distance from each other (e.g.
by means of a mechanical set pattern). During the
printing process, the stamping roller and the
cardboard box must run in sync:
How to Edit the Curve Step by Step
1. Set the FC 300 with the required parameters.
2. Select this CNF file, APOSS will then automatically open the selected file as well as the CAM-Editor.
3. Determine the gearing factor of the master in MU units.
The input should be possible in 1/10 mm resolution.
The drive is connected with the conveyor belt by means of a gearing of 25:11; i.e. the motor makes 25,
the drive pulley 11 revolutions.
Gearing factor = 25/11
Incremental encoder directly on the master
drive; encoder resolution = 4096
The drive pulley has 20 teeth/revolution,
2 teeth correspond to 10 mm, thus 1
revolution corresponds to = 100 mm conveyor
belt feed or 1000/10 mm.
Thus, the scaling factor is 1000.
Enter these values in the index card
numbers):
par. 33-10 Syncfactor Master
par. 33-11 Syncfactor Slave
4. Enter the gearing factor of the slave in UU units:
Gearing factor = 5/1
Encoder resolution (increm. encoder) = 500
One revolution of the roller is 360 degrees. We
are going to work with a resolution of
1/10 degrees. This means that we are dividing
one revolution of the roller into 3600 work units:
Scaling factor = 3600
Enter these whole number values in the index card
par. 32-12 User Unit Numerator
par. 32-11 User Unit Denominator
5. Determine a whole number factor for the intervals in the index card
are on the interpolation points. Set this using the "Set" button.
A complete cycle length of the master is 400 mm; this corresponds to 4000 MU.
The Number of Intervals = 40 results in a reasonable interval time of 25 ms.
36
__ Functions and Examples __
Gearing
25/11
Synchronization (the selected units should always be whole
= 2048
= 55
Gearing
5/1
= 25
= 9
®
MG.33.L4.02 – VLT is a registered Danfoss trademark
Slave positions [degrees]
stamp beginning 120°, end 240°
0
1500 2500
Area where master and slave
must be in sync
Factor Encoder Resolution
Scaling Factor
4096 4 25 4096
qc
1000 1000
2048 par. 33
qc 1 MU
55 par. 33
Factor Encoder Resolution
Scaling Factor
500 4 5 500 4
qc qc
3600 3600
25 par. 32 - 12
qc 1 UU
9 par. 32 - 11 User
Encoder:
Curve Data so that the Fix points
Stamping roller = Slave
Conveyor belt
= Master
4000 Master positions
[1/10 mm]
4
qc 1 MU
4
qc 1 MU
11
- 10 Syncfactor Master
- 11 Syncfactor Slave
4
qc 1 UU
1 UU
User Unit Numerator
Unit Denomintor