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Starting up the FM 453
Optimization for especially soft travel (super-soft)
For particular applications, especially soft travel response of the axis is desir-
able. By choosing the following output values for the machine data affecting
the dynamic response you can produce a very soft movement where the ac-
celeration is controlled exclusively by the jolt filter. The effective maximum
acceleration in movement-reversal processes responds proportionally to the
difference in speed, and reaches its maximum in the transition from v = 0 to
maximum speed (see Figure 7-17).
The maximum value of the actual effective acceleration can be estimated as
follows:
a
Fig. 7-17 Response on Different Velocity Transitions (Sum Effect of Jolt Filter and
7-32
Acceleration, delay
2
MD40 = MD41 (mm/s
) = 0
Jolt time
MD42 (ms) = 0.5 Ta (ms)
Positioning loop amplification
MD38 (1/min) = 100,000 : Ta (ms)
2
[mm/s
] = 16 MD23 [mm/min] : Ta [ms]
max
U
v
T_a
Position Control)
Response on different velocity transitions
(sum effect of jolt filter and position control)
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
t
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