Star Micronics MP111MP-24G-A, MP115MP-24G-A operation manual Paper Feed Motor Specifications

3.9 Paper Feed Motor Specifications

	Item			Specifications
Type		PM type stepping motor
Drive method		2-Phase excitation unipolar method
Terminal voltage		24 VDC ± 1.2 V (for drive), 4.2 VDC (when holding)
Peak current		Max. 0.7 A
Average current		About 0.28 A
Holding current		About 0.08 A
Amount of paper feed		1/144 inch per 1 step
Feed method		Forward feed only
Excitation signal		a. When paper feed amount is less that 4 steps.
		Set to 350 pps drive.
		b. When paper feed amount is over 5 steps and less than 8 steps. Set the slow-
		down area so that the final 2 steps become 300 pps and 200 pps. The other
		areas are set to 350 pps drive.
		c. When paper feed amount is over 9 steps and less than 18 steps. Set the inital
		4 steps so that they become 350 pps (slow-up area). Set the slow-down area
		so that the final 4 steps become 500 pps, 400 pps, 300 pps, and 200 pps.
		The other areas are set to 550 pps drive.
		d. When paper feed amount is over 19 steps.
		Set the initial and final 4 steps so that they become 350 pps. The other areas
		are set to 550 pps drive.
VH	24 V		D1	DSM1D1 (HITACHI)
TA1	∝ PA1428AH (NEC)		R2 to R3	10 kΩ
TR1	2SB1359 Compatible		D1	DSM1D1 (Hitachi)
TR2	2SC1740 Compatible		IC	SN74L04

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Fig. 3-16 Drive circuit of paper feed motor (example)

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