Position teaching method for a robot

A robot teaching position method for modifying an original position of one of a plurality of taught points arranged on a straight line to a modified position moved a distance along said straight line from said original position, comprising the steps of:

• determining a first position vector of said original position of said one taught point;
• providing said distance of movement along said straight line from said original position to said modified position;
• determining a second position vector and a third position vector of a second and a third of said plurality of taught points arranged on said straight line, respectively;
• determining a modified position vector of said modified position based on said determined first position vector, said provided distance, and said determined second and third position vectors;
• and
• performing a robot operation based on said determined modified position vector.