JPS6486998A - Apparatus for stopping at fixed position for sewing machine - Google Patents

Abstract

PURPOSE: To make enlargeable the selection range of a needle location stop position and to make miniaturizable a throat plate by changing the sewing speed and cloth feed amount corresponding to a needle location number until a scheduled needle location stop point after detecting the cloth end and stopping needle location at the scheduled needle location stop point. CONSTITUTION: Item values such as a sewing pitch amount, a detected distance and the distance of the cloth end and a needle location stop point inputted by a setting key 5 are read and the number of required stitches from cloth end detection to the needle location stop point is calculated. When sewing is advanced and the cloth end is detected by a cloth end detection part 1, the number of the stitches thereafter is counted. Then, so as to appropriately stop the needle location at a scheduled stop point from a cloth end detection point simultaneously, the speed reduction of a main motor 9 is started by a control means 8, a sewing pitch correction amount value is also calculated and a stepping motor 11 for constituting a cloth feed amount change part is also drive-controlled to the change state of the feed amount based on the calculated value. Then, at the point of time at which the needle location reaches the scheduled stop point, a solenoid 10 is turned off, the needle location is stopped and a thread cutting operation is performed.