Bafang BBS01 Reverse

[vvvv]

Can someone help me with unlocking the reverse rotation of bbs01 crank motor ?
basically I need to be able to move the motor shaft in both directions. In other thread I got a tip to unlock the freewheels. Can someone give more details how to do this ?
I got this video, I will be happy if you can provide the time on the video i should pay attention
http://www.youtube.com/watch?v=hfVAa5M6Nmk

Thanks a lot to everyone

 

[tahustvedt]

The built in controller will not reverse the rotation, so you need an external controller, and you need to lock the motor freewheel. The easiest way to lock it is probably to drill through the gears and shafts and pin them. There's little point in using a BBS01 for this as it's very specialized for bicycle operation and a poor choice for reverse engineering into something else. If you need a motor that runs both ways you should look into motors made for hobby robotics instead, or a direct drive hub motor.

EDIT:
Corrected comment about freewheels. Only one needs to be locked if pedaling is out of the question.

 

[spinningmagnets]

If I had a bike with a BBS02, and I desired a reverse (perhaps a heavy cargobike that is difficult to walk back uphill), I would consider the option of a small friction drive. You wouldn't need a second battery, but a 50mm diameter RC motor and a tiny ESC (RC controller) would likely perform well. Perhaps mounted on top of the front wheel?

Here is an index, you can scan the pics to see whats been done in the past. I consider the larger 63mm diameter RC motors to be a requirement (at a minimum) for a main propulsion drive, but...for a short-duration reverse, the inexpensive 50mm size is more than adequate.

http://endless-sphere.com/forums/viewtopic.php?f=28&t=14403

 

[vvvv]

The built in controller will not reverse the rotation, so you need an external controller,

External controller is ok for me, though wouldn't the reverse work if i just switch phase power cables ?

you need to lock both freewheels. The easiest way to lock them is probably to drill through the gears and shafts and pin them.

Thanks, i am still confused about freewheels is this the detail are you talking about ? https://youtu.be/hfVAa5M6Nmk?t=10m30s

 

[vvvv]

If I had a bike with a BBS02, and I desired a reverse (perhaps a heavy cargobike that is difficult to walk back uphill), I would consider the option of a small friction drive. You wouldn't need a second battery, but a 50mm diameter RC motor and a tiny ESC (RC controller) would likely perform well. Perhaps mounted on top of the front wheel?

Here is an index, you can scan the pics to see whats been done in the past. I consider the larger 63mm diameter RC motors to be a requirement (at a minimum) for a main propulsion drive, but...for a short-duration reverse, the inexpensive 50mm size is more than adequate.

http://endless-sphere.com/forums/viewtopic.php?f=28&t=14403

Thanks for reply, for my application i need to reverse the motor shaft itself. I dont use it for bike just a hobby project

 

[tahustvedt]

The BEWO is cheaper and doesn't have an integrated controller. Just needs the freewheel locked.

What exactly are you making? Can you use a worm drive motor? They are really easy to find.