Digitronic
Digital Cam Switch Unit
Automationsanlagen GmbH
CamCon DC50/51
2.1.3. Separate delay time for Speed Compensation of switch-ON and switch-OFF points
For CamCon devices of Software from 3/2002 Speed Compensation is now available for separate
switch-ON and switch-OFF points. This is necessary since some valves need longer to switch OFF
than to switch ON.
Switching attitude of a cam programs from 140° to 200° with 60 min
-1
.
Cam with 111ms Speed compensation for switch on point and 166ms
compensation for switch off point.
Cam with 111ms Speed compensation.
Cam without Speed compensation.
For the calculation of both delay times the same formuli are used as for a
normal
compensation. See
Chapter "2.1.1. Measuring delay time for Speed Compensation" on page 11 for entering delay time see
Chapter "7.3.3. Programming the delay time" on page 33.
Attention:
If the switch-off-point of a Cam overtakes the switch on point at rising speed, the result will
be an non-defined signal.
2.2. Time - Cam
With nomale cam becomes with increasing plant speed switch-on time ever more briefly. If controlling
a glueing-station, the result would be an insufficent ammount of spreaded glue.
A Time - cam however has with each plant speed a firm temporal length, so that excactly the same
ammount of glue could be spread at changing speeds. The switch-on point of the Cam on a
normal
as
well as on a Time-Cam is appointed by a position-dependent Position value and a delay-time/speed
compensation.
Normal - cam
Time - cam
60min-1
30min-1
60min-1
30min-1
For CamCon devices of software releases after 3/2002 Time Cam is also available for devices without
PLC - Logic - Module.
For entering a Time - Cam see Chapter "7.3.4. Programing Time-Cams" on page 34.
,Version from: Aug. 04
Page: 13
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E-mail:[email protected]
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