| 摘要 |
PURPOSE:To shorten the initial set time by providing it with a control means, which performs the rotation control of a motor, an integrator, which mechanically counts the number of revolutions of the motor, and a setting means, which sets counter contents, and then setting the counter contents within the range of one rotation of the motor. CONSTITUTION:Since an integrator (i) holds the number of revolutions of a motor c, even if it is let alone in the conditions that a switch (m) is turned off and power supply is inhibited, it mechanically holds the number of revolutions of the motor (c). On the other hand, at the time of restart of the motor (c), the switch (m) is made, whereby power is supplied to a controller (a), a counter (k), a pulse encoder (b), and the motor (c). According to this power supply, the controller 2 gives a signal to the motor (c) so as to make it do low-speed rotation. And when it receives an origin signal from the pulse encoder (b), it sets the contents of the counter (k) according to the contents held in the integrator (i). |
