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Spot welder and some other parts

The bike

some other parts

Controllers

Hello! I am leaving the country in a few days - sunday 19th of May! So i need to sell everything i have. I have many tools and e-bike parts. Most of the tools are used just a few times, e-bike controllers are brand new, only the bluetooth(72V 40A) one is used 1 month. I prefer to sell all...

I will probably just use 48V controller.. i have only 15 days left in UK, so i cant wait for parts... Its very strange why the motor was not spinning ok... and how it started acting normally when i put it back on the bike... I will finish with connecting the other controller tomorrow and test...

I just removed the screws to make the photo. Its hard to find these transistors in London.. or at least i dont know from where haha. Any tips for fast shipping? Any other opinions about this controller and fixing?

here are photos of the broken controler

Everything is so strange... After i unsoldered the phrase wires from hub without improving in spinning the hub... i soldered everything back and put it on the bike to make video for the supplier... The strane thing is that the motor now spins okay... so i tried again wit the controller(LCD3...

i just unsoldered them but still not spinning freely :(

so u suggest me to unsoldee the phase cables from hub and to check if it staart spinning

I tried to check the isolation of the windings and it looks alright, also the black/darker color on the sheink/isolation tubes is probably because i run the engine at 72V and the heat sometimes is more. i have no idea what to do... nothing looks "fired"

ITS 6 wires hall sensored. rear hib 48v 1500w fat bike I just opened it and it looks nothing too bad... Anyway when i shorten the phase wires it become even harder to move the engine. I opened one side only now, i am struggling opening the other one but will do now.... What i should loo for ?

I tried to explain that i disconnected the controller and everything from the bike and the result is that the motor cant spin again with moving by hand... it moves a little bit then stop then again so forget about the controller the problem is inside the motor, just my question is is it...

I was using 36V 4A battery when this happened... the engine is 48V 1500w.... is it possible this small battery to blow up the engine?

i disconnected the controller - its the same When i checked the phase wires with multimeter i saw that all of them are shorted. When i check phases to ground(chassis of the motor) its not shorted

Hello. I was just changing my controller and by mistake i reversed the battery positive and negative connection. The controller looks like didnt got any damage - showing all the info on it(LCD3 72V) BUT the motor is not spinning. After disconnecting from the controller - not spinning again. I...

I will try it. Anyway... usually when battery is very low the power is lower... so if i do it in the way you say it should be strong all the times, right? so i will need to use a relay to be able to make it to work with the alarm and remote, not adding a switch ?

Hello! I have 72v e-bike. I had a 72V bluetooth controller with LOCK engine function which can blocks the engine and it cant move. You can enable the option from settings. OR also i had alarm which have LOCK option from the remote control... so it was awesome... i never needed to bring lock...