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Operating Charac-
Example of the operating characteristic curve of a stepper motor:
teristic Curve
M
Torque increase from boost
[Nm]
M0
5
Torque drop from PWM
3,4
(
)
3
M1
M
b1
1,8
M2
0,6
M
Load
0
10
J
2
[kg cm
]
3
J
Load
0
Fig. 7-5
Operating Characteristic Curve of the Stepper Motor
Determining the
When you evaluate this example characteristic in accordance with the algo-
Machine Data
rithm in Figure 7-6, you determine the following machine data:
MD54 = 100 Hz
MD55 = 3 000 Hz
MD57 = 218 000 Hz/s
MD58 = 109 000 Hz/s
MD59 = 0
MD60 = 0
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
M
b2
100 f1 f0
1 000
12
120
Start/Stop frequency f
Frequency value
Acceleration 1 (f
Acceleration 2 (f >
Deceleration 1 = acceleration 1
Deceleration 1 = acceleration
Starting up the FM 453
Maximum permissible
operating torque
Start/Stop
SS (J = 0)
f
10 000
eg
f
max
e.g. 500 increments/revolution
1 200
ss
f
eg
)
f
eg
)
f
eg
n
[1/min]
f [Hz]
n [1/min]
7-15
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