Siemens SINUMERIK 840C - Manual (Page 649)

09.95

Siemens AG 2001 All Rights Reserved 6FC5197– j AA50 9–28
SINUMERIK 840C (IA)
D
Ramp 1 (position setpoint)
MD
RD
t
A
s
ESD
t
O
v
Speed
character-
istic
Position
Fig. 9.9
Conditions Operating mode : Position setpoint
Signal type : Ramp
ESD : Settling time
RD : Ramp time
MD : Measuring time
A : Amplitude
O : Speed offset
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 Drive Servo Start-Up Application (as from SW 3)
9.3.3 Signal waveforms of function generator (as from SW 3)
10.94