Search found 904 matches

by docw009
Mar 23 2019 11:07am
Forum: E-Bike Technical
Topic: Building a light ebike with Q100 motor : advices ?
Replies: 13
Views: 290

Re: Building a light ebike with Q100 motor : advices ?

No mention of balance current in the specs. A BMS usually stops charging when any single group reaches the maximum set point, usually 4.20 volts. If you have a situation where one group is at 4.1 or 4.0, those groups never reach full charge unless the BMS can balance them. It does this by dischargin...
by docw009
Mar 22 2019 9:54pm
Forum: E-Bike Technical
Topic: Building a light ebike with Q100 motor : advices ?
Replies: 13
Views: 290

Re: Building a light ebike with Q100 motor : advices ?

I don't think your BMS has a balance function, if that is what you wanted.
by docw009
Mar 22 2019 1:26pm
Forum: E-Bike General Discussion
Topic: KT-LCD3 & PAS not functioning
Replies: 9
Views: 114

Re: KT-LCD3 & PAS not functioning

Are you using the same sensor with different rings? You might have the disk backward with the split rings. You can mix things up, but they only work properly with the magnets on the disk coming at the sensor with correct polarity/direction. The number of magnets used in P1 is for smoother operation,...
by docw009
Mar 22 2019 1:21pm
Forum: E-Bike General Discussion
Topic: Pedals? Bbshd sizes ??
Replies: 6
Views: 105

Re: Pedals? Bbshd sizes ??

Did you mount a mid drive bafang BBS in a cruiser bike?
by docw009
Mar 22 2019 12:15am
Forum: E-Bike Technical
Topic: Built my mom an ebike and it's destroying batteries
Replies: 19
Views: 630

Re: Built my mom an ebike and it's destroying batteries

THe alarmhookup batteries only have the single XT60 plug for both charging and power, but the BMS circuits were designed for a separate charge port.. I took one apart, and peeked under the shrink wrap at another that had a different BMS. Both had unused C- pads, intended for the return leg of a char...
by docw009
Mar 21 2019 3:56pm
Forum: E-Bike General Discussion
Topic: KT-LCD3 & PAS not functioning
Replies: 9
Views: 114

Re: KT-LCD3 & PAS not functioning

Might work differently under load. I've never really tested an LCD3 PAS on a test stand except to verify that the PAS sensor was working.
by docw009
Mar 20 2019 10:54am
Forum: E-Bike Technical
Topic: Q100H / 20A Sine Controller - Speed Sensor stopped working, display not registering MPH
Replies: 8
Views: 133

Re: Q100H / 20A Sine Controller - Speed Sensor stopped working, display not registering MPH

I've got a KT controller that goes nuts trying to display speed when motor is running. Works OK when coasting on the external speed sensor. It's not a Q100 motor and I have the wrong P1 setting not knowing either magnet count or gear ratio. If I spin the motor backward and count the number of toggle...
by docw009
Mar 20 2019 10:45am
Forum: E-Bike Technical
Topic: Built my mom an ebike and it's destroying batteries
Replies: 19
Views: 630

Re: Built my mom an ebike and it's destroying batteries

If miataman2000 is using the alarmhookup packs, the BMS charge ports are not used in these packs. The maker decided they would be charged thru the discharge port. Consequently, I charge mine in parallel.

What's the main risk? Charger fault and over voltage? That's why I charge them outdoors.
by docw009
Mar 19 2019 3:21pm
Forum: E-Bike General Discussion
Topic: Power assist not working all the time ITS FIXED !
Replies: 12
Views: 208

Re: Power assist not working all the time ITS FIXED !

Pretty cool. I see two motor cables coming out of your controller. They have to be independent of each other, so it's like two controllers but in the same box and sharing the same throttle and PAS.

That's something most of us have not seen before.
by docw009
Mar 19 2019 10:17am
Forum: E-Bike Technical
Topic: Q100H / 20A Sine Controller - Speed Sensor stopped working, display not registering MPH
Replies: 8
Views: 133

Re: Q100H / 20A Sine Controller - Speed Sensor stopped working, display not registering MPH

The Q100H speed sensor is the white wire at the end of the motor cable. It uses the same 5V and ground as the three Hall signals, so if they work, the speed signal should be there. You should be able to spin the wheel with power on and watch the line move up/down once per rpm with a voltmeter. Q100H...
by docw009
Mar 18 2019 4:09pm
Forum: E-Bike General Discussion
Topic: Power assist not working all the time ITS FIXED !
Replies: 12
Views: 208

Re: Power assist not working all the time

There's got to be two controllers for the two motors. I would guess they use PAS for one motor, and throttle for both or one motor? With the above complexity, you probaly have to figure out which motors are supposed to be running under these inputs and then you can say throttle good, PAS bad, or wha...
by docw009
Mar 18 2019 10:22am
Forum: E-Bike General Discussion
Topic: Power assist not working all the time ITS FIXED !
Replies: 12
Views: 208

Re: Power assist not working

Look also at the bracket for the pedal assist sensor and the magnetic disk. Some owners report the disk getting loose somehow and slipping on the crank axle, or it has moved too far from the sensor.

You also mention a BTN model with two motors. Is that the one that is acting up?
by docw009
Mar 16 2019 9:54am
Forum: E-Bike General Discussion
Topic: Juicing Up Pictures
Replies: 7
Views: 452

Re: Juicing Up Pictures

Been to Calgary in September, July, and August. Good grief, looking at that snow makes me sick again ( I ate some bad ice cream last night and was sick all night).
by docw009
Mar 16 2019 9:51am
Forum: E-Bike General Discussion
Topic: Are These Compatable
Replies: 10
Views: 215

Re: Are These Compatable

Put 3 volts on the throttle input, with wheel off the ground. It should start up reliably. If not you got an intermittent somewhere. Could be inside the controller. It's just a $20 part. Not going to be well made. If the Hall connections were bad, there's an associated LCD3 error for that. Likewise ...
by docw009
Mar 08 2019 7:13pm
Forum: E-Bike Technical
Topic: Upgrading KT controller, unsure how to wire it up to LCD3
Replies: 5
Views: 179

Re: Upgrading KT controller, unsure how to wire it up to LCD3

When speaking of the external lights, I never hooked mine up, I cut the wires off inside the controller and insulated the ends. I also don't use cruise or EABS. Removed them too. And, yes, pushing the up arrow will turn on backlighting on the LCD3. I recall it also can activate walk mode if the bike...
by docw009
Mar 08 2019 11:55am
Forum: E-Bike Technical
Topic: Upgrading KT controller, unsure how to wire it up to LCD3
Replies: 5
Views: 179

Re: Upgrading KT controller, unsure how to wire it up to LCD3

It seems to me that your first controller used a what they call a 1-4 waterproof cable, which is a integrated harness with two brake connectors, a throttle, and the LCD3 plug on one end, and a single round connector on the other. Usually found on manufactured ebikes. Your second controller has the u...
by docw009
Mar 08 2019 12:02am
Forum: Battery Technology
Topic: Turn 48v battery into 36v after removing bad cells
Replies: 1
Views: 135

Re: Turn 48v battery into 36v after removing bad cells

You could make a 10S5P 36V pack which will be 42V at full charge. Use a 10S BMS wired conventionally, and charge it with an inexpensive 2-3A charger. I know nothing of hobby chargers. Three 12,6V packs in series is only 37.8V full charge, same as a half depleted 10S pack. I think that will feel weak...
by docw009
Mar 03 2019 4:45pm
Forum: E-Bike General Discussion
Topic: Swapping 1500w DD for a geared hub?
Replies: 12
Views: 357

Re: Swapping 1500w DD for a geared hub?

You misunderstood. Not wanting to buy wait, I' hooked a spare PAS sensor to the speed sensor input. Just needed a signal that flashes when the spoke magnet passes by.
by docw009
Mar 03 2019 1:13pm
Forum: E-Bike General Discussion
Topic: Swapping 1500w DD for a geared hub?
Replies: 12
Views: 357

Re: Swapping 1500w DD for a geared hub?

Speed sensor is $10 for an external unit, or the motor may already have it inside the hub. I've used PAS sensors mounted on frame for an external wheel sensor. Many KT controllers used with the LCD3 have a speed sensor connector. Usually a white white on a three pin JST. Move that wire to the six pi...
by docw009
Mar 03 2019 12:49pm
Forum: Motor Technology
Topic: How to wire a hall sensor to a new controller
Replies: 4
Views: 156

Re: How to wire a hall sensor to a new controller

The Giant Twist is an old front drive hubmotor. We all assume it is a brushless motor? If the old controller is still around, I'd see if it still powers up. Then I'd check its hall wires, if that's what they are, to identy +5V. Probably Brown/Black. Now there's only four left. Then if you want to be...
by docw009
Mar 02 2019 10:21am
Forum: Battery Technology
Topic: Replacing BMS yes or no
Replies: 2
Views: 152

Re: Replacing BMS yes or no

No. It's a pain to replace a BMS.
by docw009
Mar 02 2019 10:13am
Forum: Battery Technology
Topic: Battery not charging BMS voltage lower than battery total
Replies: 26
Views: 429

Re: Battery not charging BMS voltage lower than battery total

The BMS on an old "mini" Luna pack I've got here does that sort of thing sometimes. When it does, I actually have to drain the pack some (hook it to a bike, ride or run the motor, or hook it to a heater or other load for a bit, etc), and *then* I can charge it. . I have a 52V Luna Mini and their fa...
by docw009
Mar 02 2019 10:06am
Forum: Battery Technology
Topic: Battery not charging BMS voltage lower than battery total
Replies: 26
Views: 429

Re: Battery not charging BMS voltage lower than battery total

I installed that Annpower BMS yesterday. It works. What I liked about it. The C-, B-, and P- terminals had 4" lengths of silicone wire already attached. That kind of wire is hard to solder onto a circuit board pad, so that was nice. The other end I soldered. The silicone wires were easy to squiggle ...
by docw009
Mar 01 2019 11:29pm
Forum: E-Bike General Discussion
Topic: Can anybody identify this type of plug (Higo?) and where I can find it? Also, am I missing something from this kit?
Replies: 7
Views: 164

Re: Can anybody identify this type of plug (Higo?) and where I can find it? Also, am I missing something from this kit?

You need to provide a better context for looking at that plug. Like where is it going? To controller or to motor? Is the controller a separate black box or is it inside the motor? There's no a need to run more than 2 wires to a battery unless you have a proprietary system where the extra wires carry...
by docw009
Mar 01 2019 12:32pm
Forum: Battery Technology
Topic: Battery not charging BMS voltage lower than battery total
Replies: 26
Views: 429

Re: Battery not charging BMS voltage lower than battery total

Yeah my first post was in reference to the first battery at 52.5v. The second battery has two 0.6v banks which I won't use so that one I'll be tearing apart for another project. Another reason I'm keen on an adjustable balancing charger. The third battery was at 42v. To summarize. -FIrst battery al...