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 inscription 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 conve-
yor 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 .zbc (or .cnf) file, APOSS will then automatically open the selected file as well as the CAM-
Editor.
Stand-alone APOSS:
Start → CAM-Editor and load this .zbc (or .cnf) file.
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 revolu-
tion corresponds to = 100 mm conveyor belt
feed or 1000/10 mm.
Thus, the scaling factor is 1000.
Enter these values in the index card → Synchronization (the selected units should always be whole
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 → Encoder Data:
par. 32-12 User Unit Numerator
par. 32-11 User Unit Denominator
36
__ Functions and Examples __
= 2048
= 55
= 25
= 9
®
MG.33.L5.02 – 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
Gearing Factor ∗ Encoder Resolution
Scaling Factor
25/11 ∗ 4096 ∗ 4 25 ∗
qc =
1000 1000
2048 par. 33
= qc = 1 MU =
55 par. 33
Gearing Factor ∗ Encoder
Scaling Factor
5/1 ∗ 500 ∗ 4 5 ∗ 500 ∗ 4
qc =
3600 3600
25 par. 32 - 12
= qc = 1 UU =
9 par. 32 - 11
Stamping roller = Slave
Conveyor belt
= Master
4000 Master positions
[1/10 mm]
∗ 4
qc = 1 MU
4096 × ∗ 4
qc = 1 MU
× 11
- 10 Syncfactor Master
- 11 Syncfactor Slave
Resolution ∗ 4
qc = 1 UU
qc = 1 UU
User Unit Numerator
User Unit Denomintor