I need to disable the scanner check or trick it into thinking the scanner is connected and operational.
I believe the printer sends some initialization codes to the scanner bar and/or reads a preset binary pattern while it’s in the parked position or when it’s moving into the parked position.
I would like to find the sequence to send to the main board which will trick the printer into thinking the scanner section is still functioning. I will then write or contract out writing the code to run on an Atmel AtTiny chip which will listen for the scanner test and then respond with the correct string.
I do not have a spectrum analyzer or digital scope so I am unable to capture the scanners input and output.
The printer is one of the cheapest made by Epson ($60-90). I intend to repurpose the printhead and use it as an industrial label printer.
Your bid can include the cost to purchase a printer. You may have to buy some ink cartridge “read only” chips which trick the printer into thinking the ink is full. Otherwise you will run out of ink after several start-stops because the printer cleans the cartridges each time.
What I will expect will be instructions as to what signal to listen for, what signal to inject, and which pins off the ribbon cable to tap into the make this all happen.