Undersea ROV.

[Gary Clarke]

Hi,

 

i'm designing a mini undersea ROV and bought some motors for testing.

I think i bought stuff too soon though, as i'm having trouble getting the motors to go in reverse even though i have a car ESC and have programmed it for the right mode with a programming card.

I'm pretty sure the motor is sensorless (A2212/13 1000kv), can a car esc make a sensorless motor go in reverse?

 

Cheers, Gary.

 

 

[stretch]

Yes escs can run sensorless what is are you using?

[6ft4Crawler]

22 minutes ago, Gary Clarke said:

Hi,

 

i'm designing a mini undersea ROV and bought some motors for testing.

I think i bought stuff too soon though, as i'm having trouble getting the motors to go in reverse even though i have a car ESC and have programmed it for the right mode with a programming card.

I'm pretty sure the motor is sensorless (A2212/13 1000kv), can a car esc make a sensorless motor go in reverse?

 

Cheers, Gary.

 

 

Hi Gary Clarke,

Your project sounds very interesting, Regarding the motor ESC querie all brushed and brushless motors sensor less or sensored can gin both forwards and reverse, My suggestion is that possibly you have the Polarity of the 3 wires incorrect, To tell weather your motor is sensored or not is easy, Sensorless has only 3 wires, Sensored motors on the other hand has 3 wires and a connection in the end for the sensor, if using a sensored motor you must use a sensored ESC and of course the Sensor cable. 

[Gary Clarke]

I found the problem, all working now as long as i do following :

 

a) The Uno is powered from the BEC and not plugged into USB or mains adapter.

 

or

 

)b The Uno can have USB and the adapter plugged in but only 1 of the BEC’s power leads are plugged in.

 

I don't know enough to know why it has to be like this but i'm glad it's working!

 

I've ordered a USB host shield that's confirmed to work with the Oleg library https://www.circuitsathome.com/mcu/usb-host-shield-library-version-2-0-released/

 

So it's taken me two weeks just to figure out how to talk to the ESC/motor properly!

 

I'm using these motors :

 

http://www.ebay.co.uk/itm/A2212-1000Kv-Brushless-Outrunner-Motor-For-Helicopter-Quadcopter-Fixed-Wing-UK/291984414391?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

 

These ESCs :

 

https://hobbyking.com/en_us/hobbykingr-tm-brushless-car-esc-10a-w-reverse.html?___store=en_us

 

I'll be using an arduino Uno for topside control and a raspberry Pi for live video-feed.

 

My electronics experience is only from my hobbies so i'm not well-versed in it, but it's a fun project

[Gary Clarke]

I thought it odd that it works with just one BEC lead plugged in, at first i thought it may be that there's then a common ground when the negative is plugged in, but it also works with the positive lead plugged in so i don't know why still, any ideas on that would be gratefully-received.