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

I needed it for a computer control project and it worked nicely.

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.

El producto llegó muy rápido y es de buena calidad

I've had little luck with cheap DC motors with encoders in the past but I have to say this one is exceptionally high quality for what it costs. Encoder works no problem, and they are very quiet when compared to similar DC motors I've bought in the past.

My oscilloscope showed the encoder output to be noisy and not at all a square wave. A and B outputs were 90 degrees out of phase, as they should be, but the signal had no sharp edges so it was useless.

bought 4, but 1 of them has wrong encoder output signal which has lower measurement than the others. It would be nice if quality assurance is better

Pretty robust shell and wiring allows to be installed with little concerned about tight spaces or being to rough while handling it with tools.

The encoder didn't have a magnet and therefore was not functional. I requested a replacement, and the replacement was also missing its magnet. There seems to be an issue with the recent batch or the assembly process in general.