| 摘要 |
PURPOSE:To shorten the total driving time of a stepping motor, by controlling loads in the low speed range of constant speed range when controlling load due to CPU is increased, and in the high speed range of constant speed range when the controlling load is reduced. CONSTITUTION:When a plurality of stepping motors are driven at the same time on the command device of a computer, the motors re driven in two step driving patterns. For example, when the controlling capacity for the stepping motors is set to be 1,000pps, then each motor for paper feed, ribbon feed, carriage feed, and wheel feed is respectively for 250pps, and is driven in the low speed range via through-up of the driving patterns. Then, the paper feed stepping motor is through-up-driven with inertia for rotating, and is rotated at high speed in the two-step high speed range. When the action is terminated, the motor is through-down-controlled to stop the action. |
