Printer modification

[alpedroza]

I need help po. I need to alter the sensor of my printer. Basically po pag wala pang papel or ubos na ang papel, ang sensor na nakakabit sa paper path ay mag sisignal sa board na kumain na ng papel para mag start uli ang printing. Ngayon po ang gusto ko ay mag feed ng mahabang papel o continuous na papel pero mag piprint pa rin sya ng data every page na nakaset up sa printer driver. Ang ginawa ko ay ganito, nagparallel po ako ng bagong reflective sensor sa dating sensor pero bago ko ginawa ito ang dating sensor ay permanently inopen na (off). Naglagay din po ako ng black patch every end of page para ito ang makita ng sensor to start every page. Ganito po ang kinalabasan, nang mag print ako ay hindi gumana, ganito po marahil ang dahilan.
1. Ang relflective sensor pag may papel ay off ang feeder dahil nag reflect nga po ang IR. At ganito nga ang function ng sensor to shut off pag may reflection.
2. Pag tumama sya sa black patch, ang sensor ay On, pero maliit lang po ang black mark kaya di tumakbo.
3. Ang nangyari pag feed ng papel, ay naka Off ang feeder kasi inOff sya ng reflective sensor. Sa madaling salita, baliktad po ang naging function ng sensor.

Ang gusto ko po ay pag nadetect ng sensor na may papel it should feed the paper and start printing then pag tumama ang sensor sa black patch near the end of the page it should signal the printer that paper has been loaded and it should start printing the next page again.

Sana po ay naintindihan nyo ang need/problem ko at sana ay may makatulong.

[NanotecH]

muntik na akong mahilo sa explanation...

hindi mo binanggit kong ano ang complete function ng original sensor. sa pagkakaintindi ko (base sa basic function ng sensor) pag walang papel magse-send ng signal ang sensor na mag-feed ng papel, then, pag nadetect na may papel na ano ang susunod na function ng sensor, printing lang?

ang tanong ko ay nag-try ka bang gamitin yung original sensor sa continuous paper? sa pagkakaintindi ko ulit wala akong nakikitang kaibahan sa functionality ng original sensor dun sa gusto mong mangyari. lumalabas na ang function ng original sensor ay magfeed kung walang papel at pag nadetect na yung papel tuloy-tuloy na itong magpi-print, tama ba? so ang function ng black patch mo ay para mag-send ng signal na walang papel at tumuloy-tuloy ang feeding, tama ba?

[alpedroza]

Ha ha..sensya na po...pero mauna muna ang pasasalamat ko sa reply mo.

eto po ang additional explanation:

1. The original configuration ng desktop printer is for cut sheets paper lamang po.
2. Ang basic function ng original sensor is to send on/off signal to the main logic.
3. During standby mode ay naka off ang sensor.
4. Once you print from your PC, the printer detects that it has no paper (sensor is off), so it will self feed or load a the paper.
5. The paper then hit the mechanical sensor thats connected to optical sensor and turns that sensor as ON.
6. Once paper has been been detected, the printer starts to print.
7. At the end of your printing and once paper has completely passed, the mechanical sensor drops and turns the optical sensor OFF.
8. If you print more than 1 page, the printer will again load a paper then turns on again the sensor On and starts printing again.

Now on my requirement to print data on continuous blank receipts, this is what I need.
1.  I will print more than 1 pages but using continuos paper.
2. At the start of printing, the printer will detect it has no paper so it will self feed a paper.
3. Once the paper passes through my NEW sensor and turns it ON, it will start printing.
4. Before the end of printing the page, my NEW sensor will detect the black patch near the edge of the paper that was previously printed from industrial printing machine.
5. Once the small black patch has been "READ", it momentarily turns OFF my sensor (just like running out of paper na kung cut sheets) and turns ON again after the black patch then starts printing again the next data particularly a serial number and barcode of the receipt.
6. So in this case, the black patch will trigger the sensor for OFF function.

The sensor that I have here is Reflective Optical sensor, which functions opposite of my need. When there is paper, there will be a reflection so the switch is OFF, but sensing the black patch there will be no reflection so it is ON.

Kaya po baliktad ang nangyari kasi baliktad ang function ng sensor switch ko. What I basically need is a circuit that will reverse the function of my Reflective Sensor switch.

Advance thanks po sa comments and reply. Sana may mag ka interest pa. Alam ko wala pang ganitong printer  kasi nagresearch nako sa internet (Converting a desktop cutsheet printer into continuous printer but no result.

Salamat po.

[NanotecH]

ngayon mas malinaw na....

anong klaseng reflective optical sensor yan may sariling circuit na, anong model, brand, specs, etc?

ang kailangan mo lang i-invert ang output ng sensor, puedeng gumamit ka ng inverter ic or just a simple transistor inverter katulad nito:





you can check here for reference:  transistor inverter

check mo rin ang output ng inverted sensor mo para mag-match dun sa original specs ng sensor...