The LSMC servo controller performs drive control and CNC functions:
– contour speed maintenance and operational control,
– linear and circular interpolation,
– spline interpolation when working out a curvilinear trajectory of any complexity in the 2- to 5-axis system (the trajectory is set by points, during the working out the drive does not stop at intermediate points).
The LSMC also operates as a servo controller (QLC);
The automation functions are programmed by the user in QLC-Drive and the program is downloaded and stored directly in the servo controller as a text file.
A complete solution for typical CNC tasks is achieved when the LSMC is connected to a PC via a standard RS232 or USB interface.
The PC-LSMC exchange protocol is open.
If desired, the user can use a shell (PC program) offered by Ruchservomotor or develop his own.
The LSMC can be used in ‘stand alone’ mode (without connection to a PC), e.g. to control a finite state machine with functions including coordinate axis movements and/or control of digital and analog outputs depending on the state of the digital and analog input signals.
In this case the required functions are also programmed by the user in QLC-Drive and the program is downloaded as a text file directly into the servocontroller and saved there.
The system can contain from 1 to 5 controllable coordinates (axes), one of which can be gantry (consisting of two independent drives with their own feedback sensors, mechanically connected).
In this case the portal axis is considered as one controlled coordinate.
The actuators use an incremental position encoder (encoder) with a 1 Vpp analog sinusoidal or TTL pulse output (RS422 interface) as position sensor.
When using a sine encoder, a differentiated position sensor signal is usually used as speed sensor.
An independent analog signal, such as a tachogenerator signal mounted to a DC motor shaft, can be used as a speed sensor.
The position control of the actuator is performed by a three-circuit position controller including a position circuit, a speed circuit and a current circuit.
Depending on the motor type and parameters the servo controller is equipped with power amplifiers from the standard range from 1.5A, 35V to 20A, 540V (75A, 540V).
The servocontroller allows the use of a complete DC motor drive with speed setpoint instead of the power amplifier.
In this case, the servo controller generates an analog speed setpoint signal +/-10V and a 24V drive enable signal and analyzes the 24V ready signal to control the axis.