Search found 1367 matches

by docw009
Feb 19 2021 1:00pm
Forum: EBike General Discussion
Topic: Newbie rear hub drive Q's- how not to fry my motor
Replies: 14
Views: 343

Re: Newbie rear hub drive Q's- how not to fry my motor

A half mile at 10 mph will take 5 minutes to cover. Looking at Grin's simulator, a 10% grade will smoke a G310 in 6 minutes. You can estimate your motor's heat soak capability by looking at the flange distance, or the diameter. A G30 is 123 mm for flange. An Sx02 is 145 mm. That's 15% more metal and...
by docw009
Feb 17 2021 4:46pm
Forum: EBike Troubleshooting
Topic: Mxus kit failure
Replies: 14
Views: 455

Re: Mxus kit failure

From your discussion of C5, you have a KT controller. A motor/controller short would be Error 06. Never had a blown controller. Good luck. Maybe you entered C5= undefined value and it blew something. Will the motor spin backward by hand with power on. If it's hard to turn, probably confirms motor/co...
by docw009
Feb 17 2021 4:23pm
Forum: EBike General Discussion
Topic: 20" / Foldable fatbike / Bafang G60 750w / 48v 20ah battery / 48v 22a controller
Replies: 10
Views: 1307

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

I think Bolton sells a Bafang g60 rated for 750W with the big 9 pin connector. Here's a aliexpress vendor with one too. https://www.aliexpress.com/item/4000169793368.html?spm=a2g0o.productlist.0.0.179d4bb10dS2Kw&algo_pvid=1598f6d0-b6d2-4ccc-9233-de2eec663920&algo_expid=1598f6d0-b6d2-4ccc-923...
by docw009
Feb 16 2021 4:35pm
Forum: EBike Troubleshooting
Topic: Intermittent no power problem
Replies: 45
Views: 733

Re: Intermittent no power problem

Is your display capable of showing error codes, and are there any?
by docw009
Feb 12 2021 4:27pm
Forum: EBike Troubleshooting
Topic: Diagnosting a 24v controller (fag speed) with hall sensor hub motor
Replies: 3
Views: 101

Re: Diagnosting a 24v controller (fag speed) with hall sensor hub motor

What does the bike have as far as controls?

Is it a throttle only bike, or it run by the pedals activating the motor. Doe the brakes shut off the system?

Might as well start thinking about a new 24V controller. They are not expensive,
by docw009
Feb 08 2021 1:59pm
Forum: EBike Troubleshooting
Topic: Sondors Ebike problem
Replies: 19
Views: 701

Re: Sondors Ebike problem

If you have to cut the cable, that's just too much work to repair it, and it won't be as good if you have to cut.

Does your Sondors use the waterproof connectors for throttle? Can't tell from your picture. I think it would be tough to probe the throttle signals inside the controller.
by docw009
Feb 07 2021 3:12pm
Forum: EBike General Discussion
Topic: Bafang PAS sensors: why left and right option
Replies: 3
Views: 152

Re: Bafang PAS sensors: why left and right option

Nice that you got two of them Maybe they gave you two in case the integrated model was too thick to fit between the pedal arm and the BB. That was the case the last time I tried to fit one.
P1630310.JPG
P1630310.JPG (1.6 MiB) Viewed 121 times
P1630311.JPG
P1630311.JPG (1.47 MiB) Viewed 121 times
by docw009
Feb 07 2021 10:41am
Forum: EBike Troubleshooting
Topic: I have a bldc Q5O1 controller and am having trouble wiring my lcd 8H display
Replies: 17
Views: 510

Re: I have a bldc Q5O1 controller and am having trouble wiring my lcd 8H display

You might upload a copy of the manual that you said the vendor gave you.
by docw009
Feb 07 2021 10:30am
Forum: EBike General Discussion
Topic: 36 or 48 V system?
Replies: 11
Views: 588

Re: 36 or 48 V system?

This is the Xiongda two speed motor? If you buy it from Xiongda as a kit, it appears you get a dual voltage controller. with the switch to change speeds.

Let us know how it works. The initial release of this design had poor reliability reports in this forum.
by docw009
Feb 05 2021 2:51pm
Forum: EBike Troubleshooting
Topic: I have a bldc Q5O1 controller and am having trouble wiring my lcd 8H display
Replies: 17
Views: 510

Re: I have a bldc Q5O1 controller and am having trouble wiring my lcd 8H display

On the controller, maybe it doesn't use an LCD. Run it that way. Buy a inexpensive bike computer for speed/mileage. Your LCD shows a round 5 pin connector. Did you also get an extension that connects the round pins to a flat 5 pin connector? If you do go out and buy a KT controller, you'll might hav...
by docw009
Feb 04 2021 6:52pm
Forum: EBike Troubleshooting
Topic: I have a bldc Q5O1 controller and am having trouble wiring my lcd 8H display
Replies: 17
Views: 510

Re: I have a bldc Q5O1 controller and am having trouble wiring my lcd 8H display

Tell the forum more about this Q501. Googling it shows nothing. Describe the bike/scooter where it's going, Voltage. Size of motor.

If the LCD8H were going to work, the controller would have a model number starting with KT-xxxxx or S-xxxxxxx.
by docw009
Feb 04 2021 2:22am
Forum: EBike Troubleshooting
Topic: I have a bldc Q5O1 controller and am having trouble wiring my lcd 8H display
Replies: 17
Views: 510

Re: Re wiring diagram for a 5 to 1 wiring harness

I have a bldc Q5O1 controller and am having trouble wiring my lcd 8H display to the pcb cause im.unsure on the letter codes pn the board tht it shuld b wired to i have contacted the ppl i brought it from and they sent me a manual tht is still of no assistance can any1 help? The LCD8H only works wit...
by docw009
Feb 04 2021 2:21am
Forum: EBike Technical
Topic: Re wiring diagram for a 5 to 1 wiring harness
Replies: 11
Views: 605

Re: Re wiring diagram for a 5 to 1 wiring harness

modaniel wrote:
Feb 03 2021 8:38am
The throttle has 3 pins. How can I tell the polarity? Perhaps I can use a digital multimeter to do this?
Are we talking about the connector on the controller side or the throttle side? And what kind of connector is it?
by docw009
Jan 30 2021 9:26pm
Forum: EBike General Discussion
Topic: Rear Hub Research
Replies: 28
Views: 950

Re: Rear Hub Research

LOL. Some are definitely expansive,
by docw009
Jan 30 2021 5:28pm
Forum: EBike General Discussion
Topic: Rear Hub Research
Replies: 28
Views: 950

Re: Rear Hub Research

If you want a good pedal experience, then you can't have the big direct drive for speed because the magnets will drag unless you use the throttle to pass a current thru the motor. I never liked the sticky because it's focused on Lipo bag batteries, which are inexpensive but only for very careful peo...
by docw009
Jan 30 2021 1:29pm
Forum: EBike General Discussion
Topic: Rear Hub Research
Replies: 28
Views: 950

Re: Rear Hub Research

I've only owned geared rear motors, but know that the 1500W direct drive motors are pretty cheap and supposedly fast, doing 30+ mph with a good battery. That's speed to me, as my fastest ebike is only around 26-28 mph. It's peanuts to some of the fast builders,
by docw009
Jan 27 2021 4:14pm
Forum: EBike Technical
Topic: Add cheap current limiter to Ebike
Replies: 8
Views: 240

Re: Add cheap current limiter to Ebike

If it's a goalpost type shunt, with high enough legs, snip the shunt at one leg. Then solder a thin wire across the legs. This allows you to repair it if you want in the future.
shunt.jpg
shunt.jpg (88.99 KiB) Viewed 106 times
by docw009
Jan 27 2021 4:06pm
Forum: EBike General Discussion
Topic: KT LCD Settings
Replies: 20
Views: 2693

Re: KT LCD Settings

NZ87, your throttle wiring must be wrong. I recall that my KT displays will throw an error if you mix up power and signal when throttle is applied. On a KT controller, when you check an open throttle connectior, power is 4.5 volts and signal is 5.0 volts, referenced to ground. Then when the connecti...
by docw009
Jan 27 2021 3:57pm
Forum: EBike General Discussion
Topic: battery mounting
Replies: 2
Views: 117

Re: battery mounting

That Grin adapter is pretty nice. I've made my own with hose clamps, strips of rubber, and a steel plate. The hose clamps do most of the holding for me.
by docw009
Jan 26 2021 10:12pm
Forum: EBike Technical
Topic: Re wiring diagram for a 5 to 1 wiring harness
Replies: 11
Views: 605

Re: Re wiring diagram for a 5 to 1 wiring harness

He's talking about the harness that fans out to the display (5 wires), throttle (3 wires) and two brakes (2 wires). Since all three use a common ground, that's 8 wires. I'm not familiar with the 5:1 harness. Is the fifth item lights? Take the connector off the old controller, if it's dead, and wire ...
by docw009
Jan 26 2021 9:45pm
Forum: EBike Technical
Topic: tips for modding KT 9-fet controller for higher volts ?
Replies: 8
Views: 243

Re: tips for modding KT 9-fet controller for higher volts ?

How about the LM317T that drops the battery voltage down to 15 volts for the lower voltage circuits in the KT controller. Depending on the vendor, its input limit is 60V. More reason for buying a higher voltage controller.
S06S_schematic.pdf
(600.79 KiB) Downloaded 10 times
by docw009
Jan 26 2021 9:34pm
Forum: EBike Troubleshooting
Topic: Sondors Ebike problem
Replies: 19
Views: 701

Re: Sondors Ebike problem

If your other bike has the same 9 pin motor connector that Sondors uses, you could probably plug its controller into the Sondors bike. Or you could plug its motor into the Sondors controller. Every motor I've seen that uses the 9 pin connector has been compatible with other motors. While there's no ...
by docw009
Jan 15 2021 7:36pm
Forum: EBike General Discussion
Topic: Not buying anymore Ebike stuff.
Replies: 90
Views: 2977

Re: Not buying anymore Ebike stuff.

Coming back to this thread in 2021, I'll happy to still be here and hope everyone else is also OK. Covid touched my life. Two older relatives and one younger friend died of it last year. I'm waiting for the vaccine, maybe in 8-10 weeks in the over 65 tier. Last year, PSWpower sent my order to Brookl...
by docw009
Jan 15 2021 5:30pm
Forum: EBike General Discussion
Topic: Cool looking PAS unit
Replies: 1
Views: 174

Re: Cool looking PAS unit

I use a 12 magnet version because it came on a purchased ebike. I bought one for use on a recent conversion, but I didn't have enough space on either side of the BB. I tried sanding off 2 mm of plastic, but still it would bind.
by docw009
Jan 15 2021 5:27pm
Forum: EBike General Discussion
Topic: e-bike conversion kit?
Replies: 6
Views: 251

Re: e-bike conversion kit?

And where are you located, as market prices differ a bit by location, although you were given international sellers.

And what kind of performance for your expenses? I would say $1000 USD is more than enough to go fast/far, while $500 will build you a slower bike with short range.