Encoder Metal Gearmotor 12V DC High Speed 300RPM Gear Motor with Encoder for Arduino and 3D Printers

No da las rpm qué prometen, es muy baja su velocidad incluso sin la caja reductora, le realice varias pruebas con su caja reductora y sin ella, el puro motor sin caja reductora no alcanza buena velocidad, parece más un motor de 100 rpm qué de 300 rpm.

Good motor, works as expected. I use it for my small robot. Encoder works fine too. Company provides a code for Arduino in C++, which handles encoder data and controls motor with motor class. This code contains PID controller lines, but I am not using this. I modified this code for my needs, but I did not change a core part about encoder which works fine. Finally: this is a good motor. It can be used to drive small robot. Maybe RPM is high for this, but it is acceptable for small carts.

Initially it wouldn't turn - the magnet in the encoder had slipped away from the sensor and wedged against the plastic shell. Eventual figured it out and got it working

Used this motor in a small project, pretty cool it has a built in encoder for a feedback system

Motor runs fine, but the encoder is completely useless: the second encoder wire is never pulled low so it doesn't actually output "grey code" like a quadrature encoder should. Not sure if other people have had this problem but I've spent a few hours trying to debug the issue and it's definitely not a problem with my code/wiring. I guess this could be usable as an encoder if you didn't need to know the direction of the motor, but otherwise it's utterly useless.