Application examples
COMPAX-M/S
Fast start
236
11.1.7 Fast start
Application:
Material should be fed to an extender stamping machine which operates at a maximum speed of 150 rpm.
The material may only be supplied if the stamping tool is open and if the workpiece (already stamped) has
been thrown up. The material supply should be released or blocked via a switch.
Assignments:
Function:
I15
rotational
speed
j
t / ms
360°
270°
180°
90°
0°
400
300
200
100
0
1
0
100%
0
1.5ms
range within which positioning can be carried out
210° = 233ms
initiator
I15
disable
enable
COMPAX
+24V
I5
When the stamping machine runs at an operating speed of 150 strokes a minute, an operating cycle lasts
400 ms. The operating angle (at which the material can be fed) is 210°. 233 ms therefore remain for the feed
movement. To ensure that the necessary drive dynamics are kept within these limits, as much of this time as
possible must be used for the actual feed movement. This is why, the fast START is used here as it has a
response time of only 1.5 ms. The feed movement is triggered by the signal that the initiator (on the eccentric
axis) transfers via the release switch to COMPAX (I15) at an angle of
ϕ =
90º.
Once the system has been switched on, COMPAX is started via a start pulse on I5. The values for the
accelerating and braking time are set in N001 and N002, as are those for the feed speed. The positioning
command in N003 is only performed, if a rising flank (from 0 to 1) is detected on I15 (fast START). The time
between the rising flank and the start of the feed movement is 1.5 ms. Data record N004 is used to return to
N003 which ensures that the next positioning command is prepared. This is then performed after a rising
flank on I15.
