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 766, see Chapter 5.1.2.5
“Actual speed source”.
5.2.2.2 Speed sensor monitoring
Speed sensor monitoring is switched on by setting “2 – Error” of Parameter Operation Mode 760, see
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 Speed Control
Switchover Limit
738 , see Chapter 5.1.2.7 “Speed control ”.
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
Start Positioning of Axle 037.
Parameter
Reference orientation 469 enables definition of any mechanical angle for axle positioning.
The real Axle positioning will not start before the frequency set in Parameter
Positioning Frequency
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
time constant
positioning contr.
479.
Parameter
Unit
Setting range
Default settings
No.
Identifier
037
Start Positioning of Axle
-
Selection
75 – S6IND
469
Reference orientation
De-
gree
s
0.0 .. 359.9
0.0
471
Positioning Frequency
Hz
1.00 .. 50.00
50.00
479
time constant positioning contr.
ms
1.00 .. 9999.99
20.00
36 ACU Spindle Applications 11/13

BONFIGLIOLI Active Cube Specifications

General

Brand	BONFIGLIOLI
Model	Active Cube
Category	Inverter
Language	English