i chopped off a piece of the paper feed shaft so I can experiment with getting the encoder and motor to work. here i have the adafruit motor shield on an arduino and i "just" need to figure out if i can juggle enough pins to get the an interrupt free for the encoder.
woot! I got it working and under control -> code and more info here abigmagnet.blogspot.com/2008/10/dc-motor-control-part-one...
Oh and hey, check out my new project at Squigaloo
hryba, cassiano rabelo, and giupaint added this photo to their favorites.
kd1s 56 months ago | reply
How cool is that. I gutten an old Epson 880. I need to get a motor controller board for my Arduino too.
Josh Kopel 56 months ago | reply
yeah it was a little hard to figure out how to handle the mechanical stuff. I still need to find a way to hold a ball bearing in place for the encoder shaft to run in. It is just turning in a plastic retainer at the moment and it wobbles a lot. the electronics are much simpler (on the surface anyway). The motor controller is great to work with but I might just use a half h-bridge chip on its own next time (and free up some pins).