The motion control of profile milling flying saw based on controller MC206
The profile milling flying saw is able to achieve cut-to-length on moving circular and square pipe, this article highlighted the specific application of the controller MC206 in controlling the motion of the profile milling flying saw and completed the design of the corresponding program using Motion Perfect2 software, which is supported by the controller. Introduce the controller MC206 to the control system of profile milling flying saw is not only be able to achieve the continuous cutting on moving pipes with various shapes, but also increase the cutting speed and accuracy.
Kinemamtic analysis of flying-saw vehicle
The paper analyzes the kinematic motion of the flying-saw vehicle.After the analysis,it is concluded that the ac- celerating periods and decelerating periods in both forward and backward directions will follow sin~2αcurve and,in order to increase the sawing dimensional accuracy,flying-saw vehicle must come back as soon as possible while acceleration remains constant.Based on this premise,the paper gives out the equations of kinematic motion of the flying-saw vehicle in every sta- ges and one example result in a common situation.By now this method has been used in the real situation.
Optimal feedforward tracking control of linear motors for machine tool drives
Direct drive linear motors have potential for use as next generation machine tool feed drives since they can increase machining rates and improve servo accuracy by eliminating gear related mechanical problems. This paper investigates the use of optimal l/sub 1/ and H/sub /spl infin// model reference optimal feedforward control to enhance the tracking performance of a linear motor servo. Experimental work is presented which studies the effects of signal preview, tracking constraint, and reference model choice on tracking performance. Sub-optimal l/sub 1/ control in the case where the closed loop system has a zero on the unit circle due to feedback integral action is seen to give near optimal performance for the system under study here. For the specific reference trajectory employed, the best performing feedforward controllers were experimentally seen to reduce the maximum and rms tracking errors of the (feedback only) closed loop system by more than half.