Computer Drive Installation Instructions

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SINUMERIK 840C (IA)
D Ramp 2 (position setpoint with reduced acceleration value)
MD
RD
t
A
s
ESD
t
O
v
Speed
character-
istic
Position
Fig. 9.10
Conditions Operating mode : Position setpoint
Signal type : Ramp
ESD : Settling time
RD : Ramp time
MD : Measurement time
A : Amplitude
O : Speed offset
Note Set acceleration is lower (speed characteristic).
Explanation The setpoint characteristic is the same as that in the ramp 1 diagram except that
the drive acceleration has been reduced. The position setpoint transitions during
speed changes are therefore softer. The speed is influenced by the values set in
the NC-MD:
S Spindle : MD 4780 – MD 4850
S Axis : MD 2760
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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