Siemens SIMOTION Function Manual page 46

Output Cam TO - Part I
3.3 Configuring the Output Cam technology object
Example
Lines of glue are to be applied to a product at a defined position and with a fixed length. The
glue output is controlled by an output cam or a cam track. The glue is output from the start of
output cam (switch-on point) to the end of output cam (switch-off point). The offset of the begin
and end of output cam with respect to the velocity can be observed on the length and position
of the glue line on the product (see figure). The figure below shows the line of glue for two
velocities (v
Figure 3-22
Procedure:
1. Set all actuation times for start of output cam (activation time) and end of output cam
2. Define the velocities for which the positions are to be determined. You should select two
3. Start the application and determine the start positions (x
4. You can determine the actuation times for the output of output cam using the following
46
, v ) with v > v
1 2 2
Offset of the output of output cam through dead times (dead time compensation)
(deactivation time) to 0.
velocities that correspond to velocities that occur during production (e.g. minimum and
maximum velocity).
and x ) of the line of glue for the velocities v
E2
Note
To increase the accuracy, you can perform several comparison measurements and use
the average measured values.
formula.
t = Δs/Δv = (x -x
activation A2
t = Δs/Δv = (x
deactivation E2
.
1
)/(v -v )
A1 2 1
-x )/(v -v )
E1 2 1
and x ) and end positions (x
A1 A2
and v
1 2.
Output Cams and Measuring Inputs
E1
Function Manual, 04/2014