Apparatus for controlling print head

Abstract

Abstract PURPOSE:To attain to stabilize the driving of a pin, by controlling all wire pins by one return circuit to make a hardware small. CONSTITUTION:When drive signals are applied to inputs 1a-1c, transistors 8 are turned ON through AND circuits 2 and currents are supplied to solenoids 6. These currents are totally flowed through a resistor 7 and the sum of the current values of the solenoids during operation is detected. On the other hand, the number of the simultaneously inputted drive signals are converted to a voltage value by an adder 3 and an A/D converter 4. This converted reference voltage is compared to voltages at both ends of the resistor 7 by a comparator 5 and the compared outputs when currents having values decided on the solenoids 6a, 6b,... are flowed are imparted to the gates 2 and each gate is closed to turn each transistor 8 OFF.

Inventors

• 👤 Kuniaki Suzuki
• 👤 鈴木　国明

Bibliographic Details