Method for operating an electric drive for a roller shutter , the method using and comprising, respectively: a reference point at the lower edge of the roller shutter for tracking a movement of the roller shutter , a drive direction lowering the roller shutter, a drive direction lifting the roller shutter opposite to the lowering drive direction, and in each case for the lowering/lifting drive direction a lifting and lowering drive duration, respectively, the drive duration respectively comprising a first and a second drive duration, the drive duration respectively being the sum of the first and second drive durations, wherein the drive duration, i.e. the time required for complete closing and opening, respectively, of the roller shutter, is in each case predetermined or determined by measurement, characterized in that the second drive duration is in each case that in which the reference point is moved, whereas the first drive duration is in each case that in which the reference point is not moved, in each case moved in the drive direction , wherein within the second drive duration a one-to-one correspondence is formed and/or used between at least a height of the reference point and at least a time of the drive operated, wherein within the first as well as at the beginning of the second drive duration the height is equal to zero and further at the end of the second drive duration the height is the maximum height , wherein the one-to-one correspondence is based on a calculation and/or collection which takes into account the non-uniform, i.e. the increasing and decreasing, respectively, velocity of the reference point due to a winding , the winding being that of the slats of the roller shutter . a reference point at the lower edge of the roller shutter for tracking a movement of the roller shutter , a drive direction lowering the roller shutter, a drive direction lifting the roller shutter opposite to the lowering drive direction, and in each case for the lowering/lifting drive direction a lifting and lowering drive duration, respectively, the drive duration respectively comprising a first and a second drive duration, the drive duration respectively being the sum of the first and second drive durations, wherein the drive duration, i.e. the time required for complete closing and opening, respectively, of the roller shutter, is in each case predetermined or determined by measurement, characterized in that the second drive duration is in each case that in which the reference point is moved, whereas the first drive duration is in each case that in which the reference point is not moved, in each case moved in the drive direction , wherein within the second drive duration a one-to-one correspondence is formed and/or used between at least a height of the reference point and at least a time of the drive operated, wherein within the first as well as at the beginning of the second drive duration the height is equal to zero and further at the end of the second drive duration the height is the maximum height , wherein the one-to-one correspondence is based on a calculation and/or collection which takes into account the non-uniform, i.e. the increasing and decreasing, respectively, velocity of the reference point due to a winding , the winding being that of the slats of the roller shutter . <EOS>