Control for the drive of an object movable to and fro between two end positions

A control system for an electrical motor drive for moving an object to and from between two end positions in a movement cycle said object being a single or multipart door leaf comprising:

• a motor driven translational output member in form of a chain, belt, or toothed rod;
• a slide connected to said output member and coupled to said object and movable along a track;
• said control system detecting said two end positions and any intermediate positions between said end positions;
• an increment detector associated with the motor drive for reproducing said movement cycle;
• stop means associated with said motor drive and marking an end position of the object corresponding to an open position of said door leaf, said open position of said door leaf being a reference point;
• pulse storing means set to a specific value at said reference point and initiating beginning of a pulse sequence to reproduce movement of the object between said end positions, said pulse sequence being compared for coincidence with pulses produced by said increment detector upon movement of said object into an opposite end position corresponding to a closed position of said door leaf during said movement cycle;
• means for generating a switch-off signal for said motor drive when said end positions are reached;
• said pulse sequence being entered in said pulse storing means upon installation of said object;
• said beginning of said pulse sequence being marked from a point after said object has been moved by hand into said open position of said door leaf at said stop means, said increment detector generating a number of pulses entered in said pulse storing means as a travel-initiating pulse sequence when said object is moved by hand into said opposite end position corresponding to said closed position of said door leaf;
• said stop means being adjustable along said track, said stop means being adjusted into a stop position for forming an adjustable reference point for determining movement carried out in the installation of object after controlled movement of said object into a desired end position corresponding to the open position of said door leaf;
• so that data for normal subsequent operation of the door is automatically stored;
• said stop means being fixed in various displacement positions on a guide rail forming said track in a stepped or non-stepped off-set manner;
• said stop means having a buffer with a damping deformation distance, said reference point lying in said damping deformation distance;
• said damping deformation distance having a force-distance characteristic with progressively increasing tendency in shape of a bent spring characteristic corresponding to a parallel arrangement of two springs having different lengths;
• said reference point forming a set signal approaching a specific pulse sequence counting position of said pulse storing means, said counting position being the beginning of a pulse train when said stop means is non-elastic, said counting position corresponding to some pulses before reaching the end position corresponding to the open position of the door leaf when said stop means is resilient;
• said motor drive having an AC motor;
• said motor drive passing a section of reduced speed at least prior to the end position of said stop means corresponding to the open position of the door leaf;
• said pulse sequence being counted down until said section of reduced speed facing said end position at said stop means is reached upon movement against said end position at said stop means;
• supply current of power input variation to said motor drive being evaluated for forming said reference point or a switch-on signal when said stop means is abutted mechanically;
• an accident prevention function controlled through load conditions of said motor drive and suppressed in a terminal position of movement of said object corresponding to an upper third of the movement prior to reaching said stop means before the open position of said door leaf.