Siemens SINUMERIK 840C User Manual
Page 647
09.95
Siemens AG 2001
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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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