Star Micronics MP115MP-24G-A, MP111MP-24G-A operation manual TR2

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Fig. 3-15 Motor drive circuit (example)

						Notes: Adjust motor speed with VR
	R1	10 KΩ		TR1	2SA950	Notes: Adjust motor speed with VR
	R1	10 KΩ		TR1	2SA950	adjustment and T1 signal to

	R2	3.3 KΩ		TR2	2SC1740
	R2	3.3 KΩ		TR2	2SC1740	1660 Hz ± 30 Hz.

	R3	6.8 KΩ	1/6 W	TR3	2SA1175
	R3	6.8 KΩ	1/6 W	TR3	2SA1175

	R4	2.2 KΩ		TR4	2SD882

	R5	1.2 KΩ		TR5	2SB1359

	R6	10 KΩ		TR6	2SD1637

	R7	20 KΩ		IC1	SN74LS05

	C1	0.47 ∝	F (Film)	IC2	M51971L (MITSUBISHI)

	C2	0.033 ∝ F (Film)		VR	6.8 KΩ

	C3	0.022 ∝ F (Film)

3.8.1 FG Circuit

The motor control circuit with a Frequency Governor circuit maintains the printing speed at the settings. It is mainly constructed of a Speed Control IC (IC2) and a Power Transistor TR6 shown in Fig. 3-15. It measures the number of rotations of the Carriage Motor from the Timing Signal 1. This signal is then compared to the standard signal to control the speed by controlling the voltage energizing the Carriage Motor.

3.8.2 Merits of the FG Circuit

The FG circuit maintains a stable output regardless of the environment where it is being used. It maintains stability even at high speeds.

It protects the head because the speed is stable.

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Contents MP111MP-24G-A MP115MP-24G-A Page Contents General Description Other ConfigurationConstruction Principle of OperationMP111MP External view MP115MP External view Printing Specifications General SpecificationsDetails of Character Dimentions Paper Specifications Paper spec. & Print areaInk Ribbon Specifications MP111MP115 Connector Specifications CR Motor + CMN VHConnector connections Print Timing Half font Forward printingTiming Chart PrintingRelease action Print Head Specifications Transistor’s turn off delay time td 2 ∝ sTR1 Number of character per line Dot/chara 13 Print duty specific wires CR Motor Specifications 14 Current waveform of the motorTR2 Paper Feed Motor Specifications 16 Drive circuit of paper feed motor exampleRibbon Shift Solenoid RS-SOL Specifications MP115MP onlyTiming Signal Detector Specifications 19 Circuit of timing signal 1 exampleHome Position Detector HP-sig Specifications Paper-out Detector PE-sig SpecificationsRibbon Position Detector RS-sig Specifications MP115MP only Dimension and Weight24 MP111MP External dimension unit mm 25 MP115MP External dimension unit mm Reliability Specifications Setting the Ribbon Cartridge Setting the Paper Setting the PaperRemoving the Paper Installation SP2Installation space example unit mm Printer installation example unit mm Page Printer installation Power ON/OFF Note Operational NotesCarriage Motor Protection Method Against Mechanical Errors Other Notes24 V Line Power Supply Capacity5 V Line Options Paper Guide OptionDistributed by