Search found 809 matches

by docw009
Nov 16 2018 2:31pm
Forum: E-Bike General Discussion
Topic: Test speed controller while awaiting throttle
Replies: 9
Views: 150

Re: Test speed controller while awaiting throttle

FYI.. On some of the controller cases, the top is held on by a bead of silicone and pries off. This is needed for units that use an extra piece of metal to clamp the Mosfets to the side of the case,
by docw009
Nov 15 2018 11:55pm
Forum: Battery Technology
Topic: 48V / 52V Dual-use battery pack feasible?
Replies: 9
Views: 195

Re: 48V / 52V Dual-use battery pack feasible?

I've not seen the HVC with 14S on my KT controllers. I use the square wave and sinewave 6 FET 20A models, and a 25A model from Luna. I've never run my S12S on 14S though. The 14S though is the only battery I charge to 90% though. What I've seen is a minor LVC issue. It remains set at 40-41 V with 14...
by docw009
Nov 15 2018 1:55pm
Forum: E-Bike General Discussion
Topic: Test speed controller while awaiting throttle
Replies: 9
Views: 150

Re: Test speed controller while awaiting throttle

I believe your 1.5 power supply is just on the threshold of the throttle start voltage. Stack an AA cell on top of it or use two AA cells in series if you have enough hands to hold them. Also two 1K resistors twisted together in series. Put the outer ends on the power, and the middle to the sensor i...
by docw009
Nov 15 2018 11:41am
Forum: E-Bike Technical
Topic: Battery builder concerned over building a Luna Mighty Mini Clone
Replies: 8
Views: 165

Re: Battery builder concerned over building a Luna Mighty Mini Clone

No complaints on my Luna Mini, but I haven't used it but a few times with my 25A controller and 750W hubmotor. Mostly used to run a Q100H. I will criticize the XT60 charge plug, which is male and easy to short circuit on rivets and other small protruding metal parts. One of these days, I will change...
by docw009
Nov 15 2018 12:51am
Forum: E-Bike General Discussion
Topic: Need help first build with kt-lcd3
Replies: 13
Views: 368

Re: Need help first build with kt-lcd3

That's something. Mine only growled under load and since I had built tow identical bikes, except for the controller, the growl and poorer performance moved with the controller. Your original kit had a different controller w/o LCD. Did you ever run that combination? I should also mention that I've in...
by docw009
Nov 13 2018 12:12pm
Forum: E-Bike Technical
Topic: Q1148V1KW kit M14 nut thread type & torque arm placement
Replies: 6
Views: 191

Re: Q1148V1KW kit M14 nut thread type & torque arm placement

Oh #$%@^/. My first answer was not even close. They are 12mm.

I checked what I have and my 12 x 1.50 and 12 x 1.75 taps don't fit. I believe they're 12 x1.25.

If you're in the UK, check with that Woosh vendor,
by docw009
Nov 13 2018 11:00am
Forum: E-Bike General Discussion
Topic: 8FUN Motor. Controller To Source. Help Needed.
Replies: 2
Views: 141

Re: 8FUN Motor. Controller To Source. Help Needed.

These cables might help you. This first one is two parts. You splice the part with the female plug to a controller that doesn't use the 9 pin connector and the other part is not used. These should use the same color code as Bafang. Splice like to like. https://www.ebay.com/itm/A-pair-of-9Pin-Extende...
by docw009
Nov 12 2018 9:35pm
Forum: E-Bike Technical
Topic: Q1148V1KW kit M14 nut thread type & torque arm placement
Replies: 6
Views: 191

Re: Q1148V1KW kit M14 nut thread type & torque arm placement

They're [wrong]m14 x1.75 [/wrong], if I remember correctly. Unavailable except at ebike shops, I suspect. I also thought BMSbattery ships them two in a little bag with torque washers. I'd suggest you contact them if you didn't get them.
by docw009
Nov 09 2018 6:33pm
Forum: Battery Technology
Topic: Charging dolphin pack with a 5amp charger
Replies: 11
Views: 252

Re: Charging dolphin pack with a 5amp charger

Your picture says you've got 2.4AH cells in there. If it really was a 15AH battery, you would need six of them in each parallel group to get close to 15AH. Then 13 groups in series to get 48V, for 13S-6P is 78 cells. I think you have 52 cells for a 13A-4P and it's a 10AH battery with four cells in e...
by docw009
Nov 09 2018 10:22am
Forum: E-Vehicles General Discussion
Topic: Problem on Q128h Motor with s12sh controller 40A
Replies: 7
Views: 157

Re: Problem on Q128h Motor with s12sh controller 40A

Does the display go blank when this happens?Can the LCD8 show the running voltage? If it does, what does it show when the motors stop? If it doesn't put a meter on the battery and see what it shows. My questions are pointed toward determining if your battery is just too old to power the system. Usua...
by docw009
Nov 09 2018 9:50am
Forum: E-Vehicles General Discussion
Topic: Who makes speed limitation on ebike?
Replies: 3
Views: 143

Re: Who makes speed limitation on ebike?

A bike like this will probably have a top speed around 30 km/hour on 36V. bicleta.jpg The 810 display does not have any function for speed restriction. You may be lucky and your existing controller has a hanging plug that is a speed restrictor. Then you just unplug it. If not, then you must replace ...
by docw009
Nov 07 2018 6:27pm
Forum: E-Bike Technical
Topic: Newbie bike build connectors advice
Replies: 5
Views: 190

Re: Newbie bike build connectors advice

BMSBattery forgot to send you the motor extension cable. It looks like this. It will allow you to connect the motor to your controller.Send them a pic and request it. It has come with every motor I've purchased from BMSBattery, People like me prefer the 9 pin connector because it goes thru an axle n...
by docw009
Nov 06 2018 10:49am
Forum: E-Vehicles General Discussion
Topic: Problem on Q128h Motor with s12sh controller 40A
Replies: 7
Views: 157

Re: Problem on Q128h Motor with s12sh controller 40A

Seems like a lot of amps for the Q128H. It does not have a temperature sensor, but this sounds like the controller or battery cutting out. Can the battery BMS handle 40A? Did you connect a throttle and does that work continuously. What's the battery voltage and capacity?
by docw009
Nov 03 2018 9:30am
Forum: E-Bike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1578
Views: 165674

Re: 2 Speed Xiongda hubmotor

The Q128H definitely freewheels and BMSbattery probably has no customer service, but I've been lucky and never needed it.
by docw009
Nov 03 2018 9:17am
Forum: E-Bike Technical
Topic: thumb throttle for cheap Alibaba E-Bike
Replies: 10
Views: 283

Re: thumb throttle for cheap Alibaba E-Bike

On the controllers that I have, there is always 5V power for the pedal assist sensor and 4.5V power for the throttles. Based on amberwolf's hint that SP is the throttle signal, then your SP5V must be the throttle power. GND0 looks like ground. That is a nice looking controller board. Never seen one ...
by docw009
Nov 02 2018 10:57am
Forum: E-Bike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 72
Views: 6753

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

Too bad Grin is back ordered on the G310, or I might have bought one. Maybe CNEbikes would carry them. I bought a fatbike bafang motor there once, and they keep sending me email. They carry generic 250W hubmotors for about $40-50. Really shows how cheap these things are in quantity. By the way, I ha...
by docw009
Nov 02 2018 9:51am
Forum: E-Bike Technical
Topic: thumb throttle for cheap Alibaba E-Bike
Replies: 10
Views: 283

Re: thumb throttle for cheap Alibaba E-Bike

Very bold of you to take it all apart! How cheap was cheap? Thumb throttles do have three wires, Ground, Power. Signal. I take it you do not have one now, and the bike woks on pedal assist. If there is no existing throttle, you will probably have to wire the new throttle to your controller board. Th...
by docw009
Oct 31 2018 10:45pm
Forum: E-Bike General Discussion
Topic: Secure Braking
Replies: 36
Views: 505

Re: Secure Braking

Doesn't the UrbanX carry about 5-6 pounds of battery on one side of the fork? That probably aggravates the twisting too.
by docw009
Oct 31 2018 12:18pm
Forum: E-Bike Technical
Topic: No throttle respose, 48v 1200w, HM LCD3
Replies: 5
Views: 137

Re: No throttle respose, 48v 1200w, HM LCD3

Unless you programmed the LCD3 to have throttle on at all times, its default mode is that you won't have throttle until you take the bike out of PAS0 mode. Since you didn't install the PAS sensor, you probably didn't think to take it out of PAS 0. Try that on the way home. If this was the issue, you...
by docw009
Oct 30 2018 11:09am
Forum: E-Bike General Discussion
Topic: 20" / Foldable fatbike / Bafang G60 750w / 48v 20ah battery / 48v 22a controller
Replies: 8
Views: 355

Re: 20" / Foldable fatbike / Bafang G60 750w / 48v 20ah battery / 48v 22a controller

Per https://www.bafang-e.com/en/components/component/motor/rm-g060750dc.html , the G60 for a 20" fatbike is probably a 325 rpm motor, which works out to about 22 mph on a 22" diameter wheel. For $600 for the whole bike, I don't think you'll get the kind of battery that is able to sustain 22A for lon...
by docw009
Oct 30 2018 10:08am
Forum: E-Bike Technical
Topic: FLX ebike battery failure
Replies: 2
Views: 68

Re: FLX ebike battery failure

The battery management system (BMS) shuts off the battery when any of the internal cells goes below its minimum voltage limit. If those cells went too far down, it could be unsafe to revive them. Fire risk. FLX, for sure, would just scrap the battery rather than assume any product liability by tryin...
by docw009
Oct 27 2018 3:43pm
Forum: E-Bike Technical
Topic: Using the Wangdd22 1500W 30A DC Boost Converter on an ebike
Replies: 186
Views: 11647

Re: Using the Wangdd22 1500W 30A DC Boost Converter on an ebike

Are you still running that bike on a bunch of 36V4AH batteries. After a year, all five of mine are still quite useable. I only use them two at a time.
by docw009
Oct 27 2018 3:37pm
Forum: E-Bike General Discussion
Topic: E-bike Generator Challenge
Replies: 22
Views: 569

Re: E-bike Generator Challenge

You got the footloose. Not for me.

http://www.fullycharged.com/Mando-Footloose-IM
by docw009
Oct 26 2018 11:06am
Forum: E-Bike Technical
Topic: eBike kit controller technical questions
Replies: 6
Views: 214

Re: eBike kit controller technical questions

rrccc01, your link don't work. Did you get a direct drive or geared motor? I have a 500W geared motor kit with SW900 and 22A controller from ebikeling. Can't ride it slow. Cadence sensor is like on/off switch. I also switched to 20A KT torque simulation controller and LCD3 display. With torque simul...
by docw009
Oct 23 2018 8:50am
Forum: Battery Technology
Topic: Suggestion for Battery Testing Intruments
Replies: 4
Views: 174

Re: Suggestion for Battery Testing Intruments

I would want a voltmeter and a wattmeter. Neither is expensive. In the USA, one national chain store gives these voltmeters away if you buy something else. They're good enough to see if your mains AC is live or if your battery has a charge. I have about four of them. https://www.ebay.com/itm/DT830B-...