SMC Networks LECSB Series, Руководство по эксплуатации

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1. FUNCTIONS AND CONFIGURATION
1. FUNCTIONS AND CONFIGURATION
1.1 Summary
It has position control, speed control and torque control modes. Further, it can perform operation with the
control modes changed, e.g. position/speed control, speed/torque control and torque/position control. Hence, it
is applicable to a wide range of fields, not only precision positioning and smooth speed control of machine tools
and general industrial machines but also line control and tension control.
As this new series has the USB or RS-422 serial communication function, a set up software
(MR Configurator2
TM
) installed personal computer or the like can be used to perform parameter setting, test
operation, status display monitoring, gain adjustment, etc.
With real-time auto tuning, you can automatically adjust the servo gains according to the machine.
The LECSB
□
-
□
series servo motor with an absolute position encoder which has the resolution of 262144
pulses/rev to ensure. Simply adding a battery to the driver makes up an absolute position detection system.
This makes home position return unnecessary at power-on or alarm occurrence by setting a home position
once.
(1) Position control mode
An up to 1Mpps high-speed pulse train is used to control the speed and direction of a motor and execute
precision positioning of 262144 pulses/rev resolution.
The position smoothing function provides a choice of two different modes appropriate for a machine, so a
smoother start/stop can be made in response to a sudden position command.
A torque limit is imposed on the driver by the clamp circuit to protect the power transistor in the main circuit
from overcurrent due to sudden acceleration/deceleration or overload. This torque limit value can be
changed to any value with an external analog input or the parameter.
(2) Speed control mode
An external analog speed command (0 to 10VDC) or parameter-driven internal speed command (max. 7
speeds) is used to control the speed and direction of a servo motor smoothly.
There are also the acceleration/deceleration time constant setting in response to speed command, the
servo lock function at a stop time, and automatic offset adjustment function in response to external analog
speed command.
(3) Torque control mode
An external analog torque command (0 to 8VDC) is used to control the torque output by the servo motor.
To prevent unexpected operation under no load, the speed limit function (external or internal setting) is also
available for application to tension control, etc.