Asynchronous Machine (Asm) – Configuration 804 - BONFIGLIOLI ACTIVE CUBE Applications Manual

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5.2 Asynchronous machine (ASM) – Configuration 804
5.2.1 Operation without encoder
In sensor-less operation, the spindle application uses Configuration 410 (default sensor-less control)
for asynchronous motors.
5.2.2 Operation with encoder
As regards the changeover between field orientation with Speed Sensor 2 and sensor-less operation,
the ASM behavior is analogous with the PMSM. However, identification of the flux direction upon start
and setting of a resolver offset are not required in the case of an ASM.
5.2.2.1 Actual speed source
The actual speed source is selected via Parameter
"Actual speed source".
5.2.2.2 Speed sensor monitoring
Speed sensor monitoring is switched on by setting "2 – Error" of Parameter
Chapter 5.1.2.6 "Speed sensor monitoring".
5.2.2.3 Limit for changeover of speed control
The speed control changeover takes place at the torsional frequency set in Parameter
738 , see Chapter 5.1.2.7 "Speed control ".
Switchover Limit
5.3 Axle positioning
In operation with speed sensor 2 (with reference pulse), axle positioning is possible. Speed sensor 1 is
not suitable for axle positioning due to the lower bandwidth of the inputs.
With axle positioning, the machine is stopped in an adjustable mechanical orientation. In this way,
automatic tool replacement is possible even in spindles with positive-locking tool holding fixture.
Axle positioning is triggered depending on the setting of Parameter
Parameter
Reference orientation
The real Axle positioning will not start before the frequency set in Parameter
471 is reached. If, upon release of axle positioning, the current torsional frequency is higher than the
positioning frequency, it`s automatically reduced by using a simple ramp function (without rounding)
until it is below the positioning frequency.
Axle positioning by the position controller is done at the time constant set in Parameter
479.
positioning contr.
Parameter
No. Identifier
037
Start Positioning of Axle
469
Reference orientation
471
Positioning Frequency
479
time constant positioning contr.
36
Actual Speed Source
469 enables definition of any mechanical angle for axle positioning.
Unit
-
De-
gree
s
Hz
ms
ACU
Spindle Applications
766, see Chapter 5.1.2.5
Operation Mode
Start Positioning of Axle
Positioning Frequency
Setting range
Selection
0.0 .. 359.9
1.00 .. 50.00
1.00 .. 9999.99
760, see
Speed Control
037.
time constant
Default settings
75 – S6IND
0.0
50.00
20.00
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