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Old 06-25-07, 02:35 AM   #1
Bluepup
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Thumbs down Hub Drive Rolling Resistance

Hi Guys
I'm posting from Western Australia and looking for some advice on my new Front Hub drive. Itís a 400W brush less, gearless Chinese model (donít know the brand). I've mounted the drive on the front forks with the bike upside down. In this situation, the instructions (in poor pronunciation) say that it should spin freely with some slight resistance. I'm not sure what this 'slight' resistance is, it seems to be very tight, moving 1/3 of a turn max when spinning by hand. It feels like it is a kind of staggered resistance (tight then loose then tight again...). It makes no difference if the wheel nuts are tight or loose. Funnily it spun fairly freely when I first took it out of the box. Any suggestions? Maybe I've got a dud product
Cheers:
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Old 06-25-07, 07:58 AM   #2
Zeuser
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If that hub is anything like the Bionx, spinning the wheel should get you a few complete revolutions, about 10 or so, with one single hand powered thrust.

Are you spining the wheel with the power on?
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Old 06-25-07, 12:10 PM   #3
Lowell_
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Sounds like cogging torque. Power it up and see if the no load speed seems ok, and then give it a test ride.
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Old 06-25-07, 12:15 PM   #4
EbikeHawaii
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Quote:
Originally Posted by Bluepup
Hi Guys
I'm posting from Western Australia and looking for some advice on my new Front Hub drive. It’s a 400W brush less, gearless Chinese model (don’t know the brand). I've mounted the drive on the front forks with the bike upside down. In this situation, the instructions (in poor pronunciation) say that it should spin freely with some slight resistance. I'm not sure what this 'slight' resistance is, it seems to be very tight, moving 1/3 of a turn max when spinning by hand. It feels like it is a kind of staggered resistance (tight then loose then tight again...). It makes no difference if the wheel nuts are tight or loose. Funnily it spun fairly freely when I first took it out of the box. Any suggestions? Maybe I've got a dud product
Cheers:
Are the motor wires connected to the controller? Does the motor run with everything hooked up? Bionix freespins easier than most hub motors either because the controller powers up the motor slightly or it has a squewd stator and a large airgap between the magnets and stator to help eliminate COGGIING which is the magnetic detent from the magnets sticking to the stator teeth with no power applied.All hub motors COGG unless they have a machcanical freewheel.Your stator wires may be touching each other ?

Last edited by EbikeHawaii; 06-26-07 at 04:36 AM.
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Old 06-25-07, 07:12 PM   #5
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Thanks guys, I'l power it up tonight and see how she goes and I'll feed back. Happy Ebiking
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