| 摘要 |
PURPOSE:To reduce the capacity of a drive transistor by generating the optimum torque for a load in a pulse motor, thereby alleviating the load of the drive transistor. CONSTITUTION:A CPU2 first reads out a timer value from a constant table stored in a memory 1 by the program control, and sets the values in timers 3, 4. The values set in the timers 3, 4 are represented by Tan, Tbn. Then, the timer values Tan, Tbn are inputted to the set terminal S and the reset terminal R of an FF5, thereby obtaining the pulse of time width represented by (Tbn-Tan). The CPU2 repeats the operation, and sequentially applies the current control pulse to drive transistors TR1. Accordingly, the motor drive current adapted for the load can be obtained by the current control pulse by setting the timer values Tan, Tbn to the values adapted for the load. |
