Siemens SINUMERIK 840C - Manual (Page 647)

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Siemens AG 2001 All Rights Reserved 6FC5197– j AA50 9–26
SINUMERIK 840C (IA)
9.3.3 Signal waveforms of function generator (as from SW 3)
D
Square-wave (speed setpoint)
E1 T2
T1 E2
t
–A
+A
Speed
setpoint
O
Fig. 9.6
Conditions Operating mode : Speed setpoint
(position controller cycle)
Signal type : Square-wave
E1 : Switch-on instant (NC Start hardkey)
E2 : Switch-off instant (e.g. NC Reset)
T1 : Period
T2 : Pulse width
A : Amplitude (+/–)
O : Speed offset
Explanation While starting and braking is in progress, the speed setpoint is output with a de-
lay via a filter. The speed setpoint amplitude acts in relation to the set speed off-
set.
The axis/spindle is traversed at the set amplitude during period T1 (Period). The
amplitude is output with the opposite sign during period T2 (pulse width).
D
Sawtooth (speed setpoint)
E1 T1
t
–A
+A
Speed
setpoint
E2
O
Fig. 9.7
9 Drive Servo Start-Up Application (as from SW 3)
9.3.3 Signal waveforms of function generator (as from SW 3)
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