CQRobot 270:1 Metal DC Geared-Down Motor 37Dx72.5L mm 6V/12V, with 64 CPR Encoder and Bracket. 6V-3W-20RPM-40 kg.cm(556 oz.in), 12V-6W-40RPM-70 kg.cm(972 oz.in), D-Shaped Output Shaft 16mm.

This review is for the "CQRobot 70:1 Metal DC Geared-Down Motor 37Dx70L mm 6V/12V, with 64 CPR Encoder and Bracket. 6V-5W-75RPM-15 kg.cm(208 oz.in), 12V-10W-150RPM-27 kg.cm(375 oz.in), D-Shaped Output Shaft 16mm.." I ordered this due to the built-in gear reduction. Overall the motor is pretty stable with no apparent back slop. The encoder also seems to show pretty accurate measurement pulses and seems consistent with the simple test I set up. For the most part, it passed so I'm going to be using it to move a bracket into position. I can use other motors for this, but I like the gear reduction... slow for my application is better as there is no room for a worm gear. It functions as listed, and is an acceptable value for what it does. Worthy of consideration imho.

I tested this using the sketch in the Wiki listed in the product description. The first few declarations are all smashed together so you have to do a little copy and paste to get it to run properly, but it does do what it says. It will give you a running output from the motor encoder to the Arduino serial monitor. You can unplug the motor (as I did in the screen shot) and see the changes in the encoder output as the motor slows down after losing power. In order to actually do something with this, you'll need a motor controller board. There is plenty of online tutorials to guide you through that if you are new to this. Be certain to heed the warning about keeping mounting screws to 3mm of penetration. Lots of power in a small package. Works as advertised-recommended. If this review was of use to you, please consider clicking on "helpful". Thanks.

The shaft diameter is incorrect on this description and caused me to select the incorrect interfacing hardware. The motor itself is fine.

I ordered this particular motor for a robotics project, because I needed a motor with more torque than my stepper motors could provide. CQRobot's wiki had the information on how to interface an Arduino to this motor, which made controlling it easy. Mounting flange and screws were provided. The motor does have a lot of inertia, and the wiki made it clear that the motor does not stop instantly when you remove power, but you can use your controller to watch the output of the encoder to see how much movement happens, and compensate within your controller software by either gradually reducing power or removing power a bit early, to get it to stop where you want it to. Hope this was helpful.

It's a hobby and purely experimental investment. That's what I told my wife after she opened it. I haven't discussed the ball screw. The electromotive sophistication at this price is stunning. There's more torque here than I expected at 12v. I'm thinking of applications. I have ideas. How much can it actually lift before stall? To be continued ... I've already got my money's worth in entertainment and quality thinking.

I’m going to try to make a high-power RC servo with this unit, because it includes the motor, gearbox and encoder. I’m going to use an Arduino for the processing.

Like all CQRobot products this one is well documented. Head over to their excellent wiki, search for its SKU "CQR37D", and you can find all sorts of information about it and some sample code to use with arduino. It's a really nice motor with a lot of torque. It runs really well and it's a lot better documented than most motors I've picked up in the past. Like most CQRobot products I'd recommend it in a heartbeat -- it's a good brand with solid parts.

Excelente me encantó

Tengo varias cosas de la marca, y por lo general me gustan mucho, están bien de precio, y desde luego de calidad. En este caso es un excelente motor para aplicaciones DIY, con reducción 30:1, perfecto para por ejemplo mover las ruedas de un pequeño tanque robot, o una cadena, girar un brazo robotico (para esto sería mejor un motor pap, pero esto sirve también) y un montón de aplicaciones simpáticas. El motor tiene un tamano generoso, es de 36mm de diamtro y 76 de produndidad, incluyendo la tapa negra de los sensores. Un detalle que me gusta mucho, es que incluye una placa para fijarlo, y así no tienes que andar haciendo inventos para poder usarlo. Lo unico que no me gusta mucho, es que pensé que era por engranajes planetarios, y no, es de piñonería normal, cosa que se ve porque el eje de salida no está en el centro del motor, en realidad en las fotos del producto se ve, pero no me di cuenta. He abierto el motor y los piñones son de bronce y no muy gruesos, por lo que no aguantarán una carga fuerte, pero bueno, entiendo que es un motor para hobby y tampoco lo pretende. Por todo esto le doy 5 estrellas, ya estoy pensando en que proyectos ponerlo.

Le module est compatible avec l'Arduino UNO 3, peut être personnalisé pour utiliser manuellement (a l'aide d'un module potentiométrique) vous pouvez également multiplier votre force par 80 en fonction de votre usage, mais pour cela vous aurez besoin de l'alimenter en 12v et de reproduire le schéma pour monter un "stepper motor", vous remplacez le module stepper par ce moteur pour avoir un résultat plus performant, je n'ai pas essayer d'en faire un ventilateur, je ne pense pas qu'il a été conçu pour ça. Je ne l'ai pas essayé sur un Raspberry Pi, car je ne dispose pas de schéma ni de logiciel adapté pour les RPi. Quant à l'Arduino, j'ai utilisé la leçon Stepper Motor avec quelques petites modifications dans les lignes pour pouvoir l'utiliser à son plein potentiel. La qualité du moteur est très bonne, côté rapport qualité prix, on est sur un produit vraiment bien fini à un prix très honnête, le moteur est relativement très puissant ce qui justifie le tarif.

Prodotto di ottima fattura, non è facile trovare motori con queste caratteristiche, in più sono disponibili in una vasta gamma di rapporti di riduzione. Unico neo riguarda l' encoder da 16cpr che diventano 64 in quadratura, risoluzione un po' bassa per certi tipi di applicazioni su un rapporto 30:1. Per quanto riguarda la spedizione, i tempi sono accettabili, visto che arriva dalla Cina in economy ed ha impiegato poco più di 15gg.

This is a great little motor intended to be driven at 6V foward or reverse for a stall torque 7.5Kg.cm 2.8A or 12V forward or reverse for a stall torque 14.0Kg.cm 5.5A. You have a 4 wire 64CPR encoder output and the motor itself is 2 wire. The motor has 6 x M3 mountings threaded into the gearbox case [warning... dont penetrate more than 3mm into the gearbox case as you will damage the gears]. The motor comes with a well made 90° bracket that aids the mounting of this motor and it is very useful to use. The output is a keyed 16mm shaft which is 5.4mm in diameter. This is easy to control and use the encoder output in various PWM motor controllers. I actually found this a very high quality cost effective high power motor. I used it as both main traction drives for a wheeled robot and also for the robitic arms. Great to use and its well designed. Happy to recommend, Andrew

He estado probando este pequeño motor electrico de la casa CQRobot, marca de gran presencia en Amazon con mucho y muy buen material para chapucillas caseras de electronica. Y ni más ni menos que ese es el enfoque de este motor, proyectos caseros de electronica, pero no es el típico motor electrico de corriente continua al que estamos acostumbrados, con un barbaridad de revoluciones, este es justo a contrario, en ese sentido es un motor lento, no más de 120rpm a 12v, y esto es por que monta una caja reductora con una relación de cambio brutal, nada menos que 90:1, lo cualle confiere un par de fuerza de 32kg/cm a 12 voltios, una mala bestia vamos. Además de la reductora en la parte delantera, en la parte trasera cuenta con una caja de sensores que conectados a una placa arduino permitirán controlas datos de marcha, revoluciones, aceleración, etc... En cuanto a los usos posibles son muchos pero personalmente voy a ver como lo acoplo en un proyecto de un crawler 1/10 que estoy construyendo, y la verdad que creo que puede ser el motor perfecto por que el bicho tiene por chasis una jaula multitubo de acero y va a superar holgadamente los 5kg de peso, y para semejante el tema de los motores típicos de RC se me iban de precio, así que esta pequeña bestia me va a permitir al menos de momento rebajar bastante los costes del juguete, y ya solo por eso merece la pena la recomendación.