| 摘要 |
PURPOSE:To make it possible to easily set rotational speeds in several conditions even though the kind of sewing machines is changed by reading data for a kind of sewing machines stored in a memory means in accordance with a king selecting signal issued from a kind selecting means, and by delivering the same data to a speed control means so as to control the rotational speed of the associated sewing machine to a value corresponding to the kind of the machine. CONSTITUTION:When a sewing machine B is selected, a kind selecting means 10 delivers a kind selecting signal '1' to a data selecting means 11 which reads data of speed of the machine B stored in a memory means 9, and a speed control means 1 controls the speed of the machine B in accordance with thus read data. With this arrangement in which a speed data change-over means 12 may selectively use data stored in the memory means 9 and speed data set at variable resistors 2 through 5, even though a machine having a kind other than those set at the memory means 9 is used, it is possible to set a rotational speed corresponding to the kind of the machine. |
