Search found 3445 matches

by motomech
May 29 2020 7:59pm
Forum: E-Bike Technical
Topic: Schwinn controller help
Replies: 11
Views: 38

Re: Schwinn controller help

Hello Everyone I am moving my topic over to technical to see if I can get the help I need. Here is the original thread in the general section: https://endless-sphere.com/forums/viewtopic.php?f=3&t=106462 I am trying to find a controller that will work with my Schwinn Campus 250 watt motor with no h...
by motomech
May 29 2020 10:52am
Forum: E-Bike Technical
Topic: correct controller for 10s lipo? will a 36v/48v ebay one work?
Replies: 7
Views: 94

Re: correct controller for 10s lipo? will a 36v/48v ebay one work?

I assumed you were talking about LiPoly, since you didn't specify and usually a 10S battery pack would be that chem. But I suspose a 10S batt. could be Li-Ion. It really doesn't matter. At any rate, your last post doesn't make sense. If you read my post, you will see I told you a 36V/48V controller ...
by motomech
May 28 2020 12:03pm
Forum: Battery Technology
Topic: 15s lipo/li ion with 48v controller
Replies: 2
Views: 51

Re: 15s lipo/li ion with 48v controller

No way of knowing when pushing the Values that close. With genaric controllers w/ cheap caps, I've had one that worked and one that blew the cap.
Unless you aren't overly worried about losing the controller, I wouldn't try it.
by motomech
May 28 2020 11:51am
Forum: E-Bike Technical
Topic: Reducing controller's current
Replies: 4
Views: 102

Re: Reducing controller's current

You can grind the shunts down w/ a Dremel tool, very crude and you don't really know where you will end up unless you can measure Amps and go in steps. The one time I tried this, I didn't get all the metal filings cleaned out and some remained under the PBC, which of course, shorted the board. I use...
by motomech
May 28 2020 11:44am
Forum: E-Bike General Discussion
Topic: Want to build something comfortable, but issues with local bike path 'style'
Replies: 26
Views: 376

Re: Want to build something comfortable, but issues with local bike path 'style'

I always employ a "comfort strategy" to my ebikes (I'm 70). Stating with a FS mountain bike; 1) If the handlebars are low, I add adjustable "stem-extenders". 2) I use this seat; https://www.amazon.com/gp/product/B07J6RBQ1B/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 Very firm and supportive for ...
by motomech
May 28 2020 11:18am
Forum: E-Bike Technical
Topic: correct controller for 10s lipo? will a 36v/48v ebay one work?
Replies: 7
Views: 94

Re: correct controller for 10s lipo? will a 36v/48v ebay one work?

I lived in a beach town in Mexico for a year and I converted my ebike to a "boardwalk bike". Since there were people walking around, my speeds were really slow (like 15 mph max.). I started out w/ 10S LiPoly and this controller; https://www.ebay.com/itm/36V-48V-250W-14A-6FET-ebike-Electric-Bicycle-B...
by motomech
May 25 2020 4:22pm
Forum: E-Bike General Discussion
Topic: Cheap ebike kit for paragliding retrieve
Replies: 12
Views: 331

Re: Cheap ebike kit for paragliding retrieve

It's always best to keep the climbing speed at least half of the top speed w/ hub motors. Too low put's the motor in an inefficient zone that produces more heat than locomotion. It can also be hard on controllers and phase wires as the controller tries to supply max Amps.
by motomech
May 25 2020 4:02pm
Forum: E-Bike General Discussion
Topic: Lightweight City Hub Conversion shopping list
Replies: 7
Views: 358

Re: Lightweight City Hub Conversion shopping list

I thought of something else; As far as I know, the only way to use a hyd. brk sensor is to buy a lever/caliper combo w/it built in, expensive. Here is what I did; https://endless-sphere.com/forums/viewtopic.php?f=31&t=81359&p=1230540&hilit=+tektro#p1230540 Before this, when I ran the Q100 on a KT st...
by motomech
May 25 2020 3:46pm
Forum: E-Bike General Discussion
Topic: Lightweight City Hub Conversion shopping list
Replies: 7
Views: 358

Re: Lightweight City Hub Conversion shopping list

FYI, I've run both a Q100C and Q100H models and on a low-powered KT sine wave controller, they were both so quiet that they couldn't be heard over the tire noise above 5 MPH. The controller has a lot to do with motor noise. But that's neither here nor there as I'm sure the Bafang is a fine motor. Th...
by motomech
May 20 2020 10:04am
Forum: E-Bike General Discussion
Topic: First build
Replies: 5
Views: 142

Re: First build

But how far are you going to be able to go on a 10 Ah batt. at 30 mph? 10 miles? And he mentioned lot's of hills. In a perfect flatland, maybe a 30 mph, 20 mile range ebike could be built for $1000, but w/ hills, I don't think so. I could buy a motorbike or scooter for $1000 and ride it for years w/...
by motomech
May 20 2020 9:58am
Forum: E-Vehicles General Discussion
Topic: The BEST connectors, period
Replies: 51
Views: 7368

Re: The BEST connectors, period

For the main power wires, it's depends on the system Voltage. Under 50 Volts or so, simple 6 MM bullets work well. They are easy to install and replace.
For everything else, I prefer the Turnigy JST's w/ real silicone wires.
Or whatever else I have in my junk box:)
by motomech
May 20 2020 9:27am
Forum: Battery Technology
Topic: 18S LiPo Wiring diagram
Replies: 24
Views: 525

Re: 18S LiPo Wiring diagram

From what I've seen over the years, BMS systems don't seem to be a good fit for RC LiPoly. If they can be made to work, they don't seem to last. Some respond to this statement by saying a higher-end BMS is needed, but I'm dubious to this even. I would suggest you either break the string and charge w...
by motomech
May 20 2020 9:09am
Forum: E-Bike General Discussion
Topic: First build
Replies: 5
Views: 142

Re: First build

Not trying to dis-suade you, there are many reasons to build an ebike, but I would say, in most instances, having a reliable 30 mph avg. commuter that saves on gas may not be a sound one. I would suggest you look into a sm. motorbike for these reasons; 1) Gas prices are low, even in Calif. 2)A motor...
by motomech
May 19 2020 9:14pm
Forum: E-Bike Technical
Topic: Help! Best conversion kit for GF 29er Full-Suspension bike?
Replies: 4
Views: 100

Re: Help! Best conversion kit for GF 29er Full-Suspension bike?

W/ the BIG wheels, "all-terrain" aspirations and high speed goals, you probably would be better served w/ a mid-drive system.
Certainly, a 1500W hubbie and a "bottle battery" won't cut it.
You would need a BIG hub motor w/ lot's of battery.
You might want to research some of the builds here.
by motomech
May 19 2020 8:50pm
Forum: E-Bike Technical
Topic: 36V 250W controller replacement
Replies: 3
Views: 93

Re: 36V 250W controller replacement

Ok, those are an unusual bunch of colors. If it's a "factory built" bike, that probably isn't suprising. Perhaps that makes it difficult to follow the wires and see what they go to. You could do more research by looking at the wiring codes that most controllers have on their "vendor" page to see if ...
by motomech
May 19 2020 2:50pm
Forum: E-Bike Technical
Topic: 36V 250W controller replacement
Replies: 3
Views: 93

Re: 36V 250W controller replacement

There is no "right one". Look thru the many on Ebay for the Rating (in Watts), the size and the features you need. What ever you buy, the colors of the power wires (power-main, phase and Halls probably will match), the others, maybe, maybe not. There is no real standards and basicly what you will ne...
by motomech
May 18 2020 10:33am
Forum: E-Bike General Discussion
Topic: Questions about my first build: a 24” kids e-mtb rear drive conversion
Replies: 6
Views: 162

Re: Questions about my first build: a 24” kids e-mtb rear drive conversion

If you don't want to remove the frt. chain whl. to install the PAS disc, you can cut the plastic disc into 3 pieces and epoxy it on the inside of the gear. Then it's only a matter of either bending the supplied sensor bracket to position the sensor to the disc and epoxying it the the bottom bracket ...
by motomech
May 18 2020 10:26am
Forum: E-Bike General Discussion
Topic: Questions about my first build: a 24” kids e-mtb rear drive conversion
Replies: 6
Views: 162

Re: Questions about my first build: a 24” kids e-mtb rear drive conversion

Oh, I read your first post as a "10 year old bike", missed the "son" part. That list looks good for him, but I would get a 36V battery. You can still limit the speed w/ the controller and 36 Volts will give him room to grow into it. And I would still look into some quality tires with a flat resistan...
by motomech
May 17 2020 7:58pm
Forum: E-Bike General Discussion
Topic: Questions about my first build: a 24” kids e-mtb rear drive conversion
Replies: 6
Views: 162

Re: Questions about my first build: a 24” kids e-mtb rear drive conversion

That's a pretty good list, but I'm not sure about the Aliex. batt. One of the good things about using BMS Battery is that are such a lg. vendor, that they have a lot of turn over on batt.s so they are fresh. Actually, A "water bottle" or "shark" style battery will fit on the frt. of that frt. down-t...
by motomech
May 17 2020 6:24pm
Forum: Battery Technology
Topic: Requesting a BMS recommendation after fire: 8S LiPo
Replies: 24
Views: 454

Re: Requesting a BMS recommendation after fire: 8S LiPo

How not to over-discharge? Well, nothing changes on the dis-charge end when you change up the charging method except you are getting rid of the unreliable BMS Just calculate 3.65V times to number of cells and keep using the CA, but you should carry enough capacity that you don't go below 3.75 Cell. ...
by motomech
May 17 2020 6:09pm
Forum: Battery Technology
Topic: Requesting a BMS recommendation after fire: 8S LiPo
Replies: 24
Views: 454

Re: Requesting a BMS recommendation after fire: 8S LiPo

again, for some reason I can't delete
by motomech
May 17 2020 11:31am
Forum: Battery Technology
Topic: Reviving LiPo pack
Replies: 2
Views: 74

Re: Reviving LiPo pack

They are done.
They can't sit at 2 Volts and come back.
by motomech
May 17 2020 10:48am
Forum: Battery Technology
Topic: Requesting a BMS recommendation after fire: 8S LiPo
Replies: 24
Views: 454

Re: Requesting a BMS recommendation after fire: 8S LiPo

It really takes some work to catch 10C or 12C MultiStar on fire:) I've been telling folks to not use a BMS on LiPoly for years, but nobody believed me. Here are some of my posts; https://endless-sphere.com/forums/viewtopic.php?f=14&t=105666&p=1546453&hilit=LiPoly+bulk+mean+well#p1546453 https://endl...
by motomech
May 17 2020 10:24am
Forum: E-Bike General Discussion
Topic: Old GT Full Suspension - The Perfect Road Build Platform?
Replies: 16
Views: 402

Re: Old GT Full Suspension - The Perfect Road Build Platform?

There are lot's of FS bikes w/ good triangle space, but it might take a while to find them; https://endless-sphere.com/forums/viewtopic.php?f=3&t=28151&hilit=triangle+space Early to mid 2000's Giant Trance and Anthem's, Trek Fuel's, Kona Stinky's and Rocky Mountain Edge's and Slayer's are some of th...