REALM-ARK Incremental Rotation Encoder, 600 P/R Photoelectric Incremental Rotation Encoder 5~24V AB 2 Phases Shaft 6 mm for Measuring the Rotation Speed, Angle, Acceleration and Length of Objects

These seem to be everywhere - dozens of sellers all selling the same item. The instructions are scant, and mechanical drawings hard to come by, but actually this is a nice device (quite a big device, mind you).What you get out of it will depend on how you use it. If you watch both sensor lines and trigger on rising and falling edges of both, you get such incredible sensitivity that you could almost blow on it and get a reading. If you do the more usual thing and only watch one edge of each line, then you'll get 600p/r, and so less sensitivity but perfectly good output (or go cheap and only interrupt on one pin, but read both and get 300p/r).All in all, this encoder makes a good way to measure the movement of filament into my 3D printer's extruder (a filament movement sensor).Mounting this is probably the hardest part - you'll need some short M3 machine screws. In my case I 3D printed a plate to fit over the front of the encoder with "screw head pockets" so that the heads of the screws didn't obstruct the wheel I put onto the shaft.

Verwende den Encoder mit einem Arduino und einer ganz einfachen Encoder Library.Funktioniert problemlos und zuverlässig.