Siemens SINUMERIK 840C Installation Instructions Manual page 649

9 Drive Servo Start-Up Application (as from SW 3)
9.3.3 Signal waveforms of function generator (as from SW 3)
D Ramp 1 (position setpoint)
Fig. 9.9
Conditions Operating mode
Signal type
ESD
RD
MD
A
O
Note Set acceleration is very high (speed characteristic).
Erläuterung The axis/spindle is traversed at the constant speed offset during the setting time
and after ramping according to the position ramp. The speed setpoint increases
during the position ramp time.
The acceleration set in the NC MD generally applies to the signal waveform of
the speed characteristic. To obtain the above signal waveform, a very high value
must be set in this NC-MD to ensure step changes in the speed.
9–28
Position
s
A
ESD
Speed
character-
istic
v
O
: Position setpoint
: Ramp
: Settling time
: Ramp time
: Measuring time
: Amplitude
: Speed offset
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RD
MD
SINUMERIK 840C (IA)
09.95
10.94
t
t