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Modes of Operation of the MAC Integrated Servo Motors

 
The MAC motors offers the following 13 modes of operation
 
Passive The motor will be in complete passive state but communication is active and internal registers can be setup.
Velocity The motor velocity can be controlled using MacTalk software or by sending commands via the serial interface.
Position The motor position can be controlled using MacTalk or by sending position commands via the serial interface.
Gear
The position of the motor is controlled by the multifunction I/O, which is configured as input. Either a pulse and direction signal can be applied or a quadrature A and B signal from, for example, an incremental encoder.
This mode is very powerful if the MAC motor is used to upgrade a step motor system or if the motor is used in electronic gear applications such as a flying saw where an external encoder tracks the position of a moving object. In this mode the motor takes care of the stop position so there weill be no overshoot in position
Gear(Follow) The position of the motor is controlled by the multifunction I/O, which is configured as input. Either a pulse and direction signal can be applied or a quadrature A and B signal from, for example, an incremental encoder. In this mode the motor don't take care of the stop position so this has to handled somewhere else.
This mode is very powerful if the MAC motor is used to upgrade a step motor system or if the motor is used in electronic gear applications such as a flying saw where an external encoder tracks the position of a moving object.
Analogue velocity The motor velocity is controlled by a voltage applied at the ±10V analogue input.
This mode can be used in several applications but typical applications include maintaining
variable but constant speed in feeding mechanisms or as a slave driver in multi-axis systems
with a master position controller for several axes.
Analogue velocity
(with deadband)
Same function as Analogue Velocity Mode but a deadband around zero is inserted.
The deadband is +/-600mV. This feature is useful if a potentiometer or similar device
is used to control the speed of the motor since the motor will be stationary if the input
voltage is almost at zero.
Analogue velocity/gear This mode is similar to Gear mode but it is possible to increase or decrease the position of the motor by adjusting the voltage applied to the ±10V input.
A Typical application is feeding mechanisms that require "on-the-fly” adjustment.
Velocity/analogue torque The motor torque is fully controlled by a voltage applied at the ±10V analogue input.
This mode is useful if the motor is used for winding applications where a constant torque
is required in the process. Another typical application is as a slave driver in multi-axis
systems with a master position controller for several axes.
The update frequency is 521 Hz. Use Analogue Torque (Direct) if a higher bandwidth is required.
Analogue torque (direct) Same function as Analogue Torque mode but the update frequency is much higher (7812Hz).
Please note that the top speed and acceleration are NOT controlled in this mode.
Use Analogue Torque Mode if this limitation is required.
Analogue gear This mode is a bit similar to Gear mode or Analogue Velocity/Gear mode. The position of the motor is controlled by the multifunction I/O, which is configured as input. Either a pulse and direction signal can be applied or a quadrature A and B signal from, for example, an incremental encoder.
The gear ratio specified will determine the basic gear ratio between the applied pulses and the motor movement. The special feature in this mode is that the basic gear ratio can be changed +/-5% depending on the voltage applied to the analogue input.
+10V will adjust the gear ratio +5% higher and -10V will lower the gear ratio 5%.
A Typical application is feeding mechanisms that require "on-the-fly” adjustment.
Coil Similar to gear mode but the position range can be limited in such a manner that the motor
changes direction everytime the upper limit is met and also if the lower limit is met.
Both limits can be adjusted. The mode is intended to be used for controlling a wire/cable guider
on a winding maschine. The guide will follow the position of the coil driven by a "main motor”
and by using this mode it is possible to feed the wire in a very precise position regardsless
which speed the "main motor” is running at.
Analogue bi-position The motor will move a certain distance or go to one of 2 positions depending on the voltage
at the analogue input. The voltage at the analogue input will be seen as a digital signal meaning
either logic low or logic high.
The distance or positions can be setup in 2 internal registers and saved permanent in the motor.
Analogue to position The position of the motor will change proportional with the voltage at the analogue input between
the zero position and a predefined position.
A typical application could be controlling a valve position using a voltage or a current control signal.
 


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Tel: +45 4582 4440 Fax: +45 4582 5550 E-mail: jvl@jvl.dk
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