Product category:
Smaller-Sized PLCs
News Release from: Micromech | Subject: Oregon Micro Systems controllers
Edited by the Engineeringtalk Editorial
Team on 15 October 2004
New features enhance motion control
Selected control systems from Oregon Micro Systems have been enhanced with four new features designed to increase the effectiveness of motion control applications.
Selected control systems from Oregon Micro Systems have been enhanced with four new features designed to increase the effectiveness of motion control applications First, a new S-curve velocity profile provides smooth "jerk-free"motion by allowing complete control over the amount of jerk or change in acceleration, when the motion is ramping up to run speed and when the motion is ramping down to a stop
This article was originally published on Engineeringtalk on 26 Feb 2001 at 8.00am (UK)
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The ramp-up and ramp-down portions of the move are controlled independently of each other providing for custom asymmetrical S-curve profiles.
Next there is a vector mode operation providing a means of supplying a continuous, high-speed stream of vector data to the controller.
Once vector mode is entered the normal command mode of operation is bypassed and the controller expects to see the vector data, consisting of multi-axis co-ordinate positions and a corresponding velocity for moving to that position.
The velocity profile modes of the controller are also bypassed, thus giving the vector data complete control over the velocity profile.
Thirdly to address backlash problems (which is any non-movement that occurs during axis reversals), there is now a compensation feature that provides a means to specify the amount of non-movement to be corrected.
Whenever an axis reversal occurs, the controller automatically inserts the correct amount of additional motor movement to compensate for non-movement of the load attached to the motor.
Finally comes the most useful feature of "position capture", which provides the ability to capture the motor's position when an input signal changes state.
For highest accuracy, the encoder position is captured in a hardware register, thus allowing an application to precisely synchronise the position to the external even that triggered the input signal.
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