SAM4S / MYDUS

MECHANISM
High performance and Compact Printer mechanism
(STM-280 Series)

SAM4S has produced ECR printer mechanisms since 1994 and receipt printer mechanisms since 1998. SAM4S know-how and expertise has been featured in SAM4S ECRs and printers for over 20 years. Beginning in 2014, SAM4s will also produce 2" Thermal printer mechanisms.
SAM4S guarantees satisfaction to all its printer mechanism customers.

- High Speedy and Quality Printing
- Durability and Low noise
- Easy Paper loading
- Cover closed sensor (switch) to increase the accuracy
- Low power consumption and paper saving

Model		STM-280H/280HN	STM-280V/280VN	STM-281VN
Printing Format	Total number of dots	384 dots/dot line	384 dots/dot line	384 dots/dot line
	Dot Pitch (mm)	Vertical Direction 0.125	Vertical Direction 0.125	Vertical Direction 0.125
	Dot Pitch (mm)	Horizental Direction 0.125	Horizental Direction 0.125	Horizental Direction 0.125
	Character Structure	12(W) x 24(H)mm	12(W) x 24(H)mm	12(W) x 24(H)mm
	Character Size	1.5(W) x 3.0(H)mm	1.5(W) x 3.0(H)mm	1.5(W) x 3.0(H)mm
	Number of Columns	32	32	32
	Available Printing Width	48mm	48mm	48mm
Printing Speed		Max. 100mm/sec	Max. 100mm/sec	Max. 100mm/sec
Printing Direction		Unidirection with friction feed	Unidirection with friction feed	Unidirection with friction feed
Paper Feeding	Feeding Method	Friction Feed (Drop In Type)	Friction Feed (Drop In Type)	Friction Feed (Drop In Type)
Paper Feeding	Minimum Feed Pitch	0.0625mm	0.0625mm	0.0625mm
P/Supply Voltage	Power Supply Voltage	6 ~ 9.5V	6 ~ 9.5V	6 ~ 9.5V
P/Supply Voltage	Minimum Feed Pitch	3.3V, 5V DC±5%	3.3V, 5V DC±5%	3.3V, 5V DC±5%
TPH	Heat Element Density	8 dots/mm (0.125 mm/dot)	8 dots/mm (0.125 mm/dot)	8 dots/mm (0.125 mm/dot)
	Total number of head elements	384 dots/line	384 dots/line	384 dots/line
	Heat Element typical resistance value	176 Ω ± 4%	176 Ω ± 4%	176 Ω ± 4%
	Available printing width	48 mm	48 mm	48 mm
Line Feed Motor		PM type stepping motor	PM type stepping motor	PM type stepping motor
Sensors	Head Temperature	Thermistor	Thermistor	Thermistor
	Paper end sensor	Reflection Photo Sensor	Reflection Photo Sensor	Reflection Photo Sensor
	Printer Cover Open Sensor	STM-280H: Micro switch STM-280HN: None	STM-280V: Micro switch STM-280VN: None	-
Paper Feeding	Paper Type	Single-Ply Thermal Paper Roll	Single-Ply Thermal Paper Roll	Single-Ply Thermal Paper Roll
Paper Feeding	Paper Size	57.5 mm ±0.5mm(W) x Max Ø70mm or less	57.5 mm ±0.5mm(W) x Max Ø70mm or less	57.5 mm ±0.5mm(W) x Max Ø70mm or less
Reliability	Life	15,000,000 lines	15,000,000 lines	15,000,000 lines
	MCBF	37,000,000 lines	37,000,000 lines	37,000,000 lines
	TPH	1x108 Pulse, 50Km	1x108 Pulse, 50Km	1x108 Pulse, 50Km
Dimensions		30(W)x15(H)x69.5(L)mm	15(W)x30(H)x69.5(L)mm	19.7(W)x31.5(H)x69.5(L)mm