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quick review to see what is available, LEXMARK Lexmark Z1320 彩色噴墨印表機, bought last night, NT$660.....good
EPSON's inkjet printer, disassembled couple years ago. Stepper of shaft drive for paper feeding, open-loop control, cost of stepper should be higher than DC motor
The Stepper
today, this LEXMARK Lexmark Z1320 彩色噴墨印表機, DC motor is used for drive of paper feeding, low cost
CPU of this LEXMARK Lexmark Z1320 彩色噴墨印表機, ARM inside
DC motor is used for drive of paper feeding with this incremental shaft encoder for close-loop control in software of which is almost cost nothing
the disc of this encoder
the photo sensor module of this encoder
the PCB of photo sensor module of this encoder
the basis of how incremental shaft encoder works, review and refresh, it does match why the sensor module have 6 pins
LED, light source, 2 pins
power, + / -, 2 pins
output, 2 phases, 2 pins
test rig for this encoder, RED LED & quadrature output is in action
conclusion:
5V system and 3V3 interface, no sure whether it is open-collector or CMOS, but it is possible to uses the debug interface for further examination.
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