Application examples
4.2 Example 2: Spray nozzle control
4−7
l
EDSVS9332P−EXT DE 2.0
4.2 Example 2: Spray nozzle control
The combination of the spray nozzle control and the positioning of the workpiece are required for
printing machines and painting equipment. Previously a cam controller was used. However,
mechanical inaccuracies and wear often led to bad results. The absolute positioning in the 9300
servo position controllers and open control structure enables the nozzle control to be provided with
the corresponding messages. They can be read via a fieldbus or (as shown in the example) output
via the terminals.
The spray nozzle control in Fig. 4−3 is an example of absolute positioning, which replaces former
applications with mechanical cam groups.
These applications do not require mechanical limit switches or initiators that were used to be
necessary to detect the position. Using the evaluation electronics of the 9300 servo position
controller, the position information of the fed part is determined and positioned.
X5
28 E1 E2 E3 E4 E5 A1 A2 A3
A4 59
L3L2L1
39
+UG -UG
93XX
WVU
HI LO
GND
X4
RFR
24V
=
+
-
S4
S4
X7
S1
S2
S2S1
X5/A1
X5/A2
s
s
39
Fig. 4−3 Example of an absolute positioning with the ’SP1’ function block (position switch points)
Input
Function
E1 Limit switch (S1) negative direction
E2 Limit switch (S2) positive direction
E3 Start program
E4 Homing switch (S4)
E5 Changeover manual jog / program mode
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