Search found 5510 matches

by d8veh
Mar 04 2020 2:08pm
Forum: E-Bike Technical
Topic: Bafang BPM 48V500W Clutch Problem
Replies: 7
Views: 967

Re: Bafang BPM 48V500W Clutch Problem

Where are you? I think I have one or two somewhere.
by d8veh
Feb 25 2020 6:15pm
Forum: E-Bike Technical
Topic: Problem opening motor
Replies: 16
Views: 1589

Re: Problem opening motor

It's a Bafang QSWX5. There are one or two tiny grub-screws in the edge just outside the spoke flange that have to be removed first. Most are right-handed threads, but there are some with left-handed ones. You need to make the tool, then use a lot of torque to unscrew it. Heat often helps if it's stu...
by d8veh
Feb 25 2020 6:04pm
Forum: E-Bike Technical
Topic: KT-LCD5 PAS 12 magnet settings
Replies: 11
Views: 738

Re: KT-LCD5 PAS 12 magnet settings

I tried a 12 magnet regular disc and no matter what the C1 setting used it wouldn't work. I've ordered a 10 magnet disc from Aliexpress so will update when that's been tested. Currently I have to turn the pedals more than one full turn before PAS kicks in, so I'm hoping that with more magnets that ...
by d8veh
Feb 25 2020 5:45pm
Forum: E-Bike Technical
Topic: PAS backwards - how to flip?
Replies: 9
Views: 575

Re: PAS backwards - how to flip?

OP has a handed PAS, which will only work on one side in one direction. The only way to reverse direction with one of those is by software in the controller, and AFAIK, only KT controllers have that. If you have a KT controller, it's parameter C1.
by d8veh
Dec 06 2019 11:02am
Forum: E-Bike Technical
Topic: help motor run reverse
Replies: 17
Views: 1601

Re: help motor run reverse

As I said, some controllers have automatic phase and hall sequence detection without the self-learning wires. If you have one of those, it's very difficult to reverse direction because they reverse every change you make in their logic.
by d8veh
Dec 06 2019 10:54am
Forum: E-Bike Technical
Topic: LCD Display Replacement (which is it?)
Replies: 11
Views: 1326

Re: LCD Display Replacement (which is it?)

You're controller is probably an old crappy one. The modern KT ones are a lot better. They make your bike like a new one. If it were my bike, I'd replace both the controller and LCD with a a KT sine wave controller and LCD3. You can get get then from PSWPOwer.com and Topbikekit.com. delivery is quit...
by d8veh
Dec 03 2019 5:56am
Forum: E-Bike Technical
Topic: Q128C replacement freehub body
Replies: 11
Views: 1383

Re: Q128C replacement freehub body

The side-plates come off much easier if you heat up the hub between the spokes with a hot air gun until it's just about too hot to touch.
by d8veh
Dec 03 2019 5:52am
Forum: E-Bike Technical
Topic: Can someone explain this to me?
Replies: 15
Views: 1930

Re: Can someone explain this to me?

It'll be the BMS that smoked or the power wires. The cell-pack will probably be OK. BMSs normally have over-current protection, so it could be just the internal power wires that melted - easy repair.
by d8veh
Dec 03 2019 5:44am
Forum: E-Bike Technical
Topic: Spoke size pls
Replies: 4
Views: 764

Re: Spoke size pls

If you can't find the ERD for your rim from it's listing or specification, measure the open diameter from inside to inside, then add on 5mm. That should be close enough.
by d8veh
Dec 03 2019 5:36am
Forum: E-Bike Technical
Topic: LCD Display Replacement (which is it?)
Replies: 11
Views: 1326

Re: LCD Display Replacement (which is it?)

Water went in up through where the wire goes in when you leave your bike out in the rain after using it. My theory is that the LCD becomes warm in use, which expands and expels some air. When you park the bike, the air contracts inside and sucks more in along with any water that's sitting on the cab...
by d8veh
Dec 03 2019 5:13am
Forum: E-Bike Technical
Topic: help motor run reverse
Replies: 17
Views: 1601

Re: help motor run reverse

If you have a controller with automatic phase/hall sequence detection, reversing wires won't make any difference. the controller will reconfigure to reverse the change so that the motor still runs in reverse. Some controllers have the two single self-learning wires, so you must run the self-learning...
by d8veh
Dec 03 2019 5:08am
Forum: E-Bike Technical
Topic: Why doesn't a li-ion battery take load?
Replies: 24
Views: 2174

Re: Why doesn't a li-ion battery take load?

As already said, you can't believe anything about the specification of any cells with "fire" in the name. If you want to make a 36v 20-cell pack, you need high discharge rate cells, like Samsung 30Q, LG HG2, etc. You must install a BMS and charge at 42v. As an alternative, you can make two 5S2P bric...
by d8veh
Dec 02 2019 12:38pm
Forum: E-Bike General Discussion
Topic: I have a problem with the display KT-LCD8H
Replies: 3
Views: 909

Re: I have a problem with the display KT-LCD8H

Displays work independently from the rest of the system. The only link is that they communicate with the controller. All you need is the two battery wires (red and black) connected for it to switch on and light up like yours does. It will only normally communicate with a KT controller, but there is ...
by d8veh
Dec 02 2019 12:12pm
Forum: E-Bike General Discussion
Topic: How fast can my 250W chinese motor go?
Replies: 25
Views: 2923

Re: How fast can my 250W chinese motor go?

Thanks, yeah I read about those wires, I tried disconnecting / connecting all cables that were not connected to anything related to the bike, but nothing removed the speed limit. I'm still curious to know though, how it's possible that it seems my motor is braking the speed when I'm pedaling as har...
by d8veh
Dec 02 2019 11:52am
Forum: E-Bike General Discussion
Topic: How fast can my 250W chinese motor go?
Replies: 25
Views: 2923

Re: How fast can my 250W chinese motor go?

I've never read so much disinformation in a single thread. What's going on in this forum? It's been a while since I visited, and things seem to have taken a massive turn downhill. You can' start hating me now if you want. I don't care. I'm only saying it as I see it. Before you can say anything abou...
by d8veh
Nov 18 2019 6:35am
Forum: E-Bike Technical
Topic: Q100C CST cassette body removal procedure?!
Replies: 2
Views: 350

Re: Q100C CST cassette body removal procedure?!

I'm not sure if you mean just the cassette body or the entire side-plate. Here's how to get the side-plate off: Ideally, you need to make a tool to unscrew the side-plate so that you can get some leverage. You turn the side-plate using the holes that the the three countersunk screws screw into, so y...
by d8veh
Sep 27 2019 5:22am
Forum: E-Bike Technical
Topic: Commutation speed KT controllers
Replies: 2
Views: 329

Re: Commutation speed KT controllers

Thanks for that. The overheating is because these trikes run with max power a lot of the time. The S12S is only rated at 15 amps. That's why he sets the max current to 20A. The problem with the overheating is just down to the demand for current. The problem with the S12S is not overheating, it just ...
by d8veh
Sep 26 2019 4:55pm
Forum: E-Bike Technical
Topic: Commutation speed KT controllers
Replies: 2
Views: 329

Commutation speed KT controllers

A friend of mine builds cargo trikes. He uses a special motor that's attached/integrated to the differential. It has an output speed of 200 rpm and 10:1 reduction ratio, so 2000 rpm motor speed.He doesn't know how many poles or magnets. He tried the 12 FET KT Sinewave controller (S12S from BMSB), bu...
by d8veh
Apr 01 2019 6:21am
Forum: E-Bike Technical
Topic: How many Hall / Phase Combinsations are there......?
Replies: 12
Views: 841

Re: How many Hall / Phase Combinsations are there......?

What about direction@ Out of the 6, three forward and three reverse. All that only works if the timing is balanced. I've had motors where no combinations worked with KT controllers and the same motor would only run in reverse with self-learning controllers no matter what combination was connected. ...
by d8veh
Apr 01 2019 5:56am
Forum: E-Bike General Discussion
Topic: Controller problem: no led blink
Replies: 4
Views: 546

Re: Controller problem: no led blink

No LED blink normally means no power on the ignition wire. You don't provide enough information for us to help further. We need to see all the connections, and we need to know which controller it is and which control panel you're using.
by d8veh
Apr 01 2019 5:23am
Forum: E-Bike General Discussion
Topic: Overcurrent protection on battery, nothing works now
Replies: 17
Views: 1017

Re: Overcurrent protection on battery, nothing works now

One or more blown MOSFETs in the controller willdo that. Disconnect the controller and measure the resistance between the black battery wire and each of the three motor phase wires, then repeat for the red battery wire to get 6 readings. Each group of three should be the same as each other.
by d8veh
Mar 28 2019 9:44am
Forum: E-Bike Technical
Topic: 6-wire controller to 5-wire throttle
Replies: 2
Views: 399

Re: 6-wire controller to 5-wire throttle

That's it. All throttles work with only three wires: 5V, ground and throttle signal. That's all you need to connect, regardless of how many wires in the connector. Some throttles have a switch, which means two additional independent wires. You don't have to use the switch, but you can use it as an o...
by d8veh
Mar 28 2019 9:36am
Forum: E-Bike Technical
Topic: Adding second battery to BionX system.
Replies: 4
Views: 486

Re: Adding second battery to BionX system.

That's how to do it. Don't forget to disconnect for charging otherwise the battery you charge will charge the other through the discharge terminals, which bypasses all the charge safety controls.
by d8veh
Mar 28 2019 9:29am
Forum: E-Bike General Discussion
Topic: Help error code 08, 36V Brainpower ctlr 350W Bafang
Replies: 3
Views: 314

Re: Help error code 08, 36V Brainsmart ctlr 350W Bafang

We need a bit more info about how it failed. Was it OK when you parked it the night before, then didn't work in the morning or did it give some symptoms when riding? was your last ride wet? Did you disconnect or connect any wires? Most important of all, were the green self-learning wires connected w...