Patent ID: 6322733
Filing Date: 2001-11-27
Classification: B23Q,B29C,F16C,F16F,G05B

Abstract:
A method for controlling a motional sequence of a first movable component of a plastic material injection molding machine having a first trajectory spatially overlapping at least partially a second trajectory of a second movable component of said plastic material injection molding machine, wherein motion of said first movable component is initiated depending on an enabling signal indicative for a motional state of said second movable component, the method comprising the steps of:a) determining a first period of time (T.sub.WA ; T.sub.RE) between a first moment in time (t.sub.FW ; t.sub.FR) when said enabling signal is generated and a second moment in time (t.sub.6 ; t.sub.3) when said first movable component enters said second trajectory;b) determining a second period of time (T.sub.RAmax ; T.sub.WEmax) between said first moment in time (t.sub.FW ; t.sub.FR) and a third moment in time (t.sub.10 ; t.sub.8) when said second movable component leaves said first trajectory;c) comparing said first period of time (T.sub.WA ; T.sub.RE) with said second period of time (T.sub.RAmax ; T.sub.WEmax) and generating a difference signal therebetween; andd) controlling motion of said first movable component as a function of said comparison of said first period of time (T.sub.WA ; T.sub.RE) with said second period of time (T.sub.RAmax ; T.sub.WEmax) such that said difference signal is smaller than a predetermined minimum tolerance value (T.sub.2 ; T.sub.1).