Connector Questions

[canadmin]

I purchased a new controller for my BPM trike from pswpower. The connector from the throttle has a three wire jst connector and a two wire jst. The controller has the three wire connector but I don't know where to connect the two wire connector. The throttle has a push button that switches between pedal assist and throttle, hence the two wire connector. Should it be connected to the "speed control" connector on the controller? Should it be connected to some other two pin connector? Do I have the wrong controller? Do I have to buy the expensive one direct from BPM? Thanks for your help.

 

[PedalUma]

If you have the correct controller everything will corespond if not ask for the correct controller.

 

[canadmin]

If you have the correct controller everything will corespond if not ask for the correct controller.

The "correct controller" is expensive (CAD $280). I'm trying to avoid buying that one but its looking like I'm going to have to bite the bullet unless I hear something different here soon. Thx.

 

[harryS]

I had a look at the BPM website. Sure looks like they use KT controllers. DId everything else match up as far as connections?

I've got about a half dozen KT controllers installed in my garage, They are the only ones I will use on my DIY ebike conversions. I don't understand this button for selecting throttle and pedal assist. KT controllers allow both to be active at once, or both to be off so you can pedal w/o power. I don't see how you can switch this function on the normal KT controller. There is no input for it, as you are seeing on the PSWpower documents.

What display are you using? Is it powering up normally?

Could be they got KT to install some special firmware for PAS/throttle selection, but that cost money, and there's no need in my opinion to even have that choice.

I would just ignore it. See if the trike runs without it,

 

[harryS]

I also see the throttle that BPM sells. Kind of hard to tell, but it looks like they switched the connections. The KT controller you bought goes Red-Black-Blue. Red/Black are power/ground and blue is signal.

This throttle goes Red-White-Black. I figure Red/Black are still power/ground, but now they are in the wrong order. That means this throttle can't work the way it's wired. You probably have to switch two of the wires.

 

[canadmin]

I had a look at the BPM website. Sure looks like they use KT controllers. DId everything else match up as far as connections?

I've got about a half dozen KT controllers installed in my garage, They are the only ones I will use on my DIY ebike conversions. I don't understand this button for selecting throttle and pedal assist. KT controllers allow both to be active at once, or both to be off so you can pedal w/o power. I don't see how you can switch this function on the normal KT controller. There is no input for it, as you are seeing on the PSWpower documents.

What display are you using? Is it powering up normally?

Could be they got KT to install some special firmware for PAS/throttle selection, but that cost money, and there's no need in my opinion to even have that choice.

I would just ignore it. See if the trike runs without it,

Everything else seems to match up. The display is powering up normally. I will try switching the wires tomorrow. Fingers crossed that will work. If it doesn't, I will have to get a controller directly from BPM, I guess. Thx for your advice.

 

[Slaphappygamer]

Harrys is right. 2 wires will need to be swapped. I have found that it’s easier to depin the female connections. You’ll need to flip the black and blue on the controller side. Or you can flip the black and green at the male connector of the throttle.

In the end, you’ll have black/black, blue/green, and red/red.

 

[canadmin]

Harrys is right. 2 wires will need to be swapped. I have found that it’s easier to depin the female connections. You’ll need to flip the black and blue on the controller side. Or you can flip the black and green at the male connector of the throttle.

In the end, you’ll have black/black, blue/green, and red/red.

Thanks for the help. I will do this today.

 

[canadmin]

Thanks for the help. I will do this today.

I made those changes and now everything on the display looks right but the wheel still doesn't spin. I'm back to thinking I've killed my controller with all my changing wires and connectors around. I know all the sensors are working and the motor tests as good. New (expensive) BPM controller has been ordered and my fingers are crossed that it will fix the bike.

 

[harryS]

While waiting for the BPM, does the brake icon on the display come on when you squeeze the brake levers? You might unplug the brakes anyway, and see if the throttle works.

Also try the walk mode, which doesn't need throttle or PAS or brakes connected up, It's a good test to see if the motor is wired properly,

 

[canadmin]

While waiting for the BPM, does the brake icon on the display come on when you squeeze the brake levers? You might unplug the brakes anyway, and see if the throttle works.

Also try the walk mode, which doesn't need throttle or PAS or brakes connected up, It's a good test to see if the motor is wired properly,

The brake icons are coming on now. I've tried to run the bike with detached brake sensors and no change. The walk mode icon comes on now but wheel still does not spin.

 

[harryS]

Must be something up with the motor connections then.

WIth the 2x3 white connector, do colors match on either side..red-red, black-black, green-green, blue-blue, yellow-yellow. white-white?

 

[canadmin]

Must be something up with the motor connections then.

WIth the 2x3 white connector, do colors match on either side..red-red, black-black, green-green, blue-blue, yellow-yellow. white-white?

View attachment 178969

The colors match but while I was there, I decided to check the continuity of the adapter I made for the 2x6 to flat 6 connector. I found that some of the connections are not good. I will repair the adapter and see what happens.

 

[canadmin]

The colors match but while I was there, I decided to check the continuity of the adapter I made for the 2x6 to flat 6 connector. I found that some of the connections are not good. I will repair the adapter and see what happens.

I'm still having connection problems but I can't pinpoint the problem. I think there is more than just one bad one. I wonder if its because I used the cheapest connectors I could find on aliexpress. I did not solder the blades to the wires, just crimped. Some of the wire is aluminum, I think and some copper. Can I solder them?

 

[PCeBiker]

,.. Some of the wire is aluminum, I think and some copper. Can I solder them?

Those silver colored wires are probably tin and they solder up fine.

I had a cable guy install my internet that told me they use tin now instead of copper for the cable.
A roll of tin cable is $100, while a roll of copper cable is over $700.

 

[canadmin]

Those silver colored wires are probably tin and they solder up fine.

I had a cable guy install my internet that told me they use tin now instead of copper for the cable.
A roll of tin cable is $100, while a roll of copper cable is over $700.

Thanks.

 

[harryS]

Crimps on the 18G and 20G wires used in these sensors can be problematic w/o a real crimping tool sized for those thinner wires.

I looked the wires on one of my spare KT's. Bare copper, maybe tinned at the ends. Would love to see the stranded wires fully tinned. Easier to solder.

 

[Slaphappygamer]

Would love to see the stranded wires fully tinned

That’d be one heck of a process. It’s amazing to see cable being manufactured.

 

[canadmin]

Crimps on the 18G and 20G wires used in these sensors can be problematic w/o a real crimping tool sized for those thinner wires.

I looked the wires on one of my spare KT's. Bare copper, maybe tinned at the ends. Would love to see the stranded wires fully tinned. Easier to solder.

I've ordered a proper crimping tool as well as a wire stripper. When I receive them, I will re-do all the connections I've made.

 

[canadmin]

That’d be one heck of a process. It’s amazing to see cable being manufactured.

Thanks, good video.