| 摘要 |
<p>The invention concerns an electronic device for the accurate positioning of machine-tools used for direct-current machines with reference display.According to the invention, the electronic device for the accurate positioning of machine-tools is used to control the sensor device to erase an erroneous command, sensors to control the necessary increments, transistors to control the bistable chips that memorise the command, an inversing gate and a cross-connecting circuit that avoid commands when plugging the electronic device, for groups of three diodes, in order to cancel another command while another one is in progress, LEDs to signal the received command, symmetric difference gates, single-trip chips that bring the commanded channels back to their initial state after the determination of the necessary dimensions, a single-trip chip that deletes the counting chips that sends an impulse after ten and a hundred received impulses respectively, transistors that activate some relays whose contacts send the two determined voltages to the direct-current variator.</p> |
