Patent Number: 041995392
Section: claims

1. A method for monitoring the operation of a dual platen press including a first platen and a second platen subject to displacement with variable velocity toward and away from each other during a cycle of operation, the method comprising the steps of: indicating the displacement of said first platen;  indicating the displacement of said second platen; and  imposing said displacements on orthogonal axes such that said displacements jointly control the motion of a point which traces a first lissajous figure representative of the displacement and relative velocity of said platens.  superimposing a second lissajous figure representing desired platen displacement and over said first lissajous figure to facilitate comparison between said first lissajous figure and said second lissajous figure.  indicating the displacement of said first platen;  indicating the displacement of said second platen;  imposing said indicated displacements on orthogonal axes such that said displacements jointly control the motion of a point which traces a first lissajous figure representative of the displacement and relative velocity of said platens, the completion of said figure coinciding with the completion of the cycle of operation of said platens;  detecting the completion of preselected portions of said first lissajous figure; and  triggering subsequent operations of the cycle of operation in response to the detection of the completion of said preselected portions of said first lissajous figure for controlling the operation of the press.  generating a first electrical signal representative of the displacement of said first platen;  generating a second electrical signal representative of the displacement of said second platen; and  imposing said signals on orthogonal axes such that said signals jointly control the motion of a point which traces a first lissajous figure representative of the displacement and relative velocity of said platens.  superimposing a second lissajous figure representing desired platen displacement and relative velocity on said orthogonal axes over said first lissajous figure to facilitate comparison between said first lissajous figure and said second lissajous figure.  generating a first electrical signal representative of the displacement of said first platen;  generating a second electrical signal representative of the displacement of said second platen;  imposing said signals on orthogonal axes such that said signals jointly control the motion of a point which traces a first lissajous figure representative of the displacement and relative velocity of said platens;  detecting the completion of preselected portions of said first lissajous figure; and  triggering subsequent operations of the cycle of operation in response to the detection of the completion of said preselected portions of said first lissajous figure for controlling the operation of said press.  generating a first electrical signal representative of the displacement of said first platen;  generating a second electrical signal representative of the displacement of said second platen; and  imposing said signals on orthogonal axes such that said signals jointly control the motion of a point which traces a first lissajous figure representative of the displacement and relative velocity of said platens. 2. The method of claim 1 further including the step of: 3. A method for monitoring and controlling the operation of a dual platen press including a first platen and a second platen subject to displacement with variable velocity toward and away from each other during a cycle of operation, the method comprising the steps of: 4. A method for monitoring the operation of a dual platen press including a first platen and a second platen subject to displacement with variable velocity toward and away from each other during a cycle of operation, the method comprising the steps of: 5. The method of claim 4 further including the step of: 6. A method for monitoring and controlling the operation of a dual platen press including a first platen and a second platen subject to displacement with variable velocity toward and away from each other during a cycle of operation, the method comprising the steps of: 7. A method for monitoring the operation of a dual platen press used in the manufacture of nuclear fuel pellets, said press including a first platen and a second platen subject to displacement with variable velocity toward and away from each other during a cycle of operation, the method comprising the steps of: