I also have a bad experience with Aliexpress.Ordered 5 motors 12 watt BLDC geared motors at topbrand via Aliexpress (95$ a piece exclusive postage). They were advertised as standard out of stock motors.Quality of the productGot only 4 (they keep the money for my next buy ) because they only made 5 and killed one. You have 2 wires for power 24 V, 1 wire for speed (PWM 5V) and 1 wire to connect to ground to change the direction (but not 5V resistant)on one of the motors the PWM and direction are switched => 5V on direction => another motor dead.So 5 motors mode only 3 survived the first run.About quality of service:I send the money on the 16 th of januari (no paypal or visa)They confirmed receive of the money on 9 feb (due to chineese new year )They send the motors on the 4th of april (that is about 2 months to ship the products)The motors arrived the 14th of april.So 3 months to send 3 working motors of an order of 5 where I need 4 of them. 600$ down the drain About service after delivery:Normally they are very responsive but since I reported the dead motor (with picture of the internals to prove the bad connection): Not a single word.I have plenty of good experiences with chineese companies but this is way over the top.Jantje
controller engineer told me that this motor is without hall sensor, which means if the motor works with higher loading, it will work bad. usually, the non- hall sensor brushless motor is loaded with a fan or blower which is not big.you can't always complain our motor, I think you also should consider other possibilities.
Technical specs:Voltage up to 29V (battery fluctuates between 29V and 22V)Driver can be any voltage. Already available are regulated 5V 12VStall torque at the wheels should be minimum 8.9NMrated torque at the wheels should be minimum 1.5NMrpm at the wheels should be minimum 61The output watt at the wheels should be substantial above 15
So this 95 USdollar motor is not as advertised.
Quote from: Jantje on Jun 05, 2014, 11:01 pmSo this 95 USdollar motor is not as advertised.FIFY. Contact your credit card company and dispute the transaction as not as advertised.
I have been really stupid on this site.no paypal no visa. Direct bank transfer.Another 30 euro costs.....I know .... hard lesson, won't do it again.Jantje
The Arduino Zero announcement got me all excited,
Quote from: Jack Christensen on Jun 06, 2014, 03:39 amThe Arduino Zero announcement got me all excited,What aspect(s) in particular?