tos Posted December 23, 2007 Report Share Posted December 23, 2007 I've gutted a low-end z612 lexmark printer the other day an as far as I can tell it uses the somple electromotor in conjuction with a optocoupler reading from a film strip. The markings on a strip are small. About a 5 binary 1-0 pairs are fitted in 1mm which makes it a hi-res way of reading position.Anyway, the optocoupler has emitting LED (two wires) and on the other end 4 wires where, from what I've seen on the traces, only one is GND. Also, when exposed to incandescant light, all three pins seem to have voltage > 0.Has anyone the idea how this OC works? Quote Link to comment Share on other sites More sharing options...
Sasha Posted December 24, 2007 Report Share Posted December 24, 2007 I collected some of those optocouplers and stripes myself thinking of experimenting with it. I never did some experimentations but I guess on the other part should be 2 photo transistors as 2 contacts in encoder so it should be pretty easy to hook it onto DIN. I tested some single interrupt optocouplers from printers and they work fine. Maybe yours are broken.. :-\ Quote Link to comment Share on other sites More sharing options...
tos Posted December 24, 2007 Author Report Share Posted December 24, 2007 Hehe...superheating does wonderous things to electronics.Tnx for reply. Quote Link to comment Share on other sites More sharing options...
Sasha Posted December 24, 2007 Report Share Posted December 24, 2007 ;D ;D ;D Quote Link to comment Share on other sites More sharing options...
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