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Impact Dot Matrix Printer Mechanisms


Printing speed: 2.5 lines/sec
Paper roll 58mm
Single color printing

  • 58mm paper width
  • 2.5 lines/sec printing speed
  • 5V operation
  • 24 columns (144 dots/line)
  • Compact design

Model MD-910 MD-911
Printing method Serial impact dot matrix
Printing direction One-way printing
Printing speed Approx. 2.5 lines/sec. Approx. 1.8 lines/sec.
Number of columns 24 columns: 144 dots/line 40 columns: 180 dots/line
Font 5 × 7 matrix 4 × 7 matrix
Number of wires 8 pins(4 pins × 2 heads)
Character size(W × H) Approx. 1.7 × 2.4mm Approx. 1.1 × 2.4mm
Character pitch 1.98mm(Interval of columns)
3.52mm(Interval of lines)
1.17mm(Interval of columns)
3.52mm(Interval of lines)
Motor Voltage: 5.0V DC / Peak current: Approx. 1A / Average current: 0.3A max.
Dot pulse sensor Photo interrupter
Home pulse sensor Leaf switch
Printing sensor Voltage: 5.0 V DC / Resistance: 1.7±0.3Ω(25°C)
Paper feeding solenoid Voltage: 5.0 V DC / Resistance: 9±2Ω(25°C)
Connecting method Copper foil patterns at 2.54mm pitch.
Driving voltage 3.5~5.5V DC
Printing paper 57.5±0.5mm
Copy Original print + 1 copy
Ink ribbon cartridge Single color (Black)
Paper feeding speed Approx. 5 lines/sec. Approx. 3.6 lines/sec.
External dimensions (W × D × H) 90 × 45.5 × 16mm
Weight 105g±10%
Operating temperature 0~50°C
Storage temp. range -25~70°C
Reliability MCBF: 1.5 million lines MCBF: 1.0 million lines


Ink ribbon cartridge  
IR-91B IR-91PL

Paper winder  

Control board Control chip
CBM-909-2D 909PC-2DU