Help needed !

[davedoubledecks]

Hi all new here
Looking for some advice on a cheap violamart conversion kit to test the water
I purchase a second user kit on ebay to try building a bike that was the first mistake as the wires were shot....all mended now but nothing from the motor...throttle kit shows power but nothing from the motor...tested the hall sensor and seems to be giving output on all 3 but not turning wheel ...could it be the control unit ?
Any help would be grest

 

[davedoubledecks]

Hi all new here
Looking for some advice on a cheap violamart conversion kit to test the water
I purchase a second user kit on ebay to try building a bike that was the first mistake as the wires were shot....all mended now but nothing from the motor...throttle kit shows power but nothing from the motor...tested the hall sensor and seems to be giving output on all 3 but not turning wheel ...could it be the control unit ?
Any help would be grest

The motor had some moisture in it but no real damage etc
Is there a way of testing the motor without the controller?

 

[saneagle]

The motor had some moisture in it but no real damage etc
Is there a way of testing the motor without the controller?

No. The problem is unlikely to be the motor. Have you got a throttle to test it. If so, disconnect the brakes and PAS from the controller to test it.

 

[davedoubledecks]

Thanks for the reply....I've tried that but nothing from it
..the screen lights up on the throttle control and shows power but nothing to the motor

 

[Nealh]

What were the Hall results ?
Did try turning the motor wheel slowly by hand to check them switching ?

One can try a mosfet check to see if the controller is not suffering from a short.

https://ebikes.ca/documents/BlownMosfets.pdf

 

[davedoubledecks]

No. The problem is unlikely to be the motor. Have you got a throttle to test it. If so, disconnect the brakes and PAS from the controller to test it.

I've tried all of that but still no output just the lcd display on the throttle

 

[davedoubledecks]

What were the Hall results ?
Did try turning the motor wheel slowly by hand to check them switching ?

One can try a mosfet check to see if the controller is not suffering from a short.

https://ebikes.ca/documents/BlownMosfets.pdf

hi nealh,
when i tested each sensor they would fluctuate between 5 and probably 2 volts as the wheel was turning on each sensor wire ?

 

[davedoubledecks]

What were the Hall results ?
Did try turning the motor wheel slowly by hand to check them switching ?

One can try a mosfet check to see if the controller is not suffering from a short.

https://ebikes.ca/documents/BlownMosfets.pdf

thanks for the link i have printed it off and will have a test later to what that shows
regards
andrew

 

[saneagle]

I think we need some details about what was wrong with the wiring and what you did to fix it.

 

[davedoubledecks]

I think we need some details about what was wrong with the wiring and what you did to fix it.

ok so when i got the kit there was a a bit of cable damage on the spindle and the cable had been taped up..i removed and found the yellow hall sensor wire was broken so i split the motor, found some moisture inside, cleaned everything, shortened the cable a little then re soldered all of the joints and re-enforced the cable on the spindle with heat shrink and replaced the spring etc...all seemed to test out ok for continuity
cheers
andrew

 

[saneagle]

If a phase wore touched a hall wire, it could wipe out the CPU on the controller. You'd need an ebike tester to check that. They cost about £10 on Ebay, but brobably best just to buy a new controller set unless you might be testing more ebikes in the future. I'd ditch that stupid throttle thing and get a normal thumb throttle and controller with LCD.

 

[davedoubledecks]

If a phase wore touched a hall wire, it could wipe out the CPU on the controller. You'd need an ebike tester to check that. They cost about £10 on Ebay, but brobably best just to buy a new controller set unless you might be testing more ebikes in the future. I'd ditch that stupid throttle thing and get a normal thumb throttle and controller with LCD.

ok thanks for the reply...what would you recommend for controller, a voilamart or something else ...

 

[davedoubledecks]

ok thanks for the reply...what would you recommend for controller, a voilamart or something else ...

ive heard mention of controllers from topbikekit.com??

 

[Nealh]

Kt 9 mosfet with a nice lcd display, I personally keep the disoay simple and use the well regarded lcd3 though there are quite a few to choose from. The lcd4 took my fancy but it prooved to be a little intermittent in use so I opted to revert to my trusted LCD3. The fancy colour displays don't do much for me.

 

[davedoubledecks]

Kt 9 mosfet with a nice lcd display, I personally keep the disoay simple and use the well regarded lcd3 though there are quite a few to choose from. The lcd4 took my fancy but it prooved to be a little intermittent in use so I opted to revert to my trusted LCD3. The fancy colour displays don't do much for me.

Great, are these available in the UK or from China?

 

[davedoubledecks]

thanks for the link i have printed it off and will have a test later to what that shows
regards
andrew

I've just put the meteron to test the phase wires and have no resistance or continuity across all 3 ?

 

[Nealh]

I buy from China either TBK or various AliExp sellers, delivery is often only 14 days.
UK resellers ask to much money so I simply cut out another middle man.

 

[davedoubledecks]

O

I buy from China either TBK or various AliExp sellers, delivery is often only 14 days.
UK resellers ask to much money so I simply cut out another middle man.

Ok cheers not sure if it's all scrap anyway lol as the motor doesn't seem to test out

 

[saneagle]

O
Ok cheers not sure if it's all scrap anyway lol as the motor doesn't seem to test out

If You're unsure about that, it'll be worth buying an ebike tester, which tests both the controller and motor:

Car Scooter E-bike Brushless Motor Controller Tester 24V 36V 48V 60V 64V 72V UK | eBay

Find many great new & used options and get the best deals for Car Scooter E-bike Brushless Motor Controller Tester 24V 36V 48V 60V 64V 72V UK at the best online prices at eBay! Free delivery for many products.

www.ebay.co.uk

 

[davedoubledecks]

Worth a try before I spend anymore money lol
Cheers