Search found 2006 matches

by Russell
May 03 2015 12:16pm
Forum: E-Bike General Discussion
Topic: 12.5 AH now is 8.3 ??????
Replies: 11
Views: 1142

Re: 12.5 AH now is 8.3 ??????

Is the CA "direct connect" or "standalone"? If it's the former it needs to be calibrated to the shunt in the controller. If the CA does not have the right shunt resistance value it will not give the correct Amps, Amp-hours, or Watt-hours. If you have a standalone unit it has an external shunt so no ...
by Russell
May 03 2015 9:58am
Forum: Motor Technology
Topic: Sensorless, halls, encoders, motor efficiency?
Replies: 28
Views: 4414

Re: Sensorless, halls, encoders, motor efficiency?

Tests I did years ago showed no difference between running sensored or sensorless. Now that I have controllers which can run geared motors glitch free (the KU93 is my favorite) I run all three of my E-bikes sensorless. Because I pedal a lot the thing which influences how much battery power I use is ...
by Russell
May 02 2015 10:58pm
Forum: E-Bike General Discussion
Topic: 12.5 AH now is 8.3 ??????
Replies: 11
Views: 1142

Re: 12.5 AH now is 8.3 ??????

How old is the battery and what type is it? How many cycles on the battery and how often have you run it down to cut-off? Be aware that discharging a battery completely will shorten its life significantly. Is the controller the same as the previous unit. Do you ride at a higher speed with a higher a...
by Russell
May 02 2015 4:15pm
Forum: E-Bike Build Threads / Photos & Video
Topic: My Jeep Comanche E-Bike
Replies: 20
Views: 8283

Re: My Jeep Comanche E-Bike

These days, my perfered controller is the 9-FET 17A from Elifebike, mated with the simple 810 meter. This controller is sturdy, not prone to over-heating and and have useful LVC's for both 12S (42V) and 9S (31V). And it's almost as quiet as the Sines waves. Overall, I'm impressed with the Q100H. 2....
by Russell
May 02 2015 3:59pm
Forum: E-Bike Build Threads / Photos & Video
Topic: My Jeep Comanche E-Bike
Replies: 20
Views: 8283

Re: My Jeep Comanche E-Bike

Overall I wasn’t unhappy with the motor until I got home and felt the case. It was hot where I could not keep my hand on it for more than a couple of seconds. With a trip average speed of 17.7 mph it wasn’t like I was pushing it hard so it did surprise me especially considering it was only 60 degre...
by Russell
May 01 2015 7:46pm
Forum: E-Bike Build Threads / Photos & Video
Topic: My Jeep Comanche E-Bike
Replies: 20
Views: 8283

Re: My Jeep Comanche E-Bike

Another year, another little front geared motor to try. This time it’s an Outrider. I actually bought the motor last year at the same time I ordered a YOUE. I laced up the YOUE right away and used it on both my Nashbar Flatbar bike and then on this Jeep Comanche. I am impressed with the YOUE and mov...
by Russell
Apr 28 2015 7:27pm
Forum: Items for Sale - New
Topic: 48v Electric FatBike on Indiegogo
Replies: 53
Views: 11778

Re: 48v Electric FatBike on Indiegogo

Hey Mikebikerad,

After the INDIEGOGO campaign is over do you plan on selling the bike online or through retail bike stores? It looks like a great bike for the money. Even at the MSRP of $1499 I do believe they would sell well.

-R
by Russell
Apr 25 2015 11:44am
Forum: E-Bike Build Threads / Photos & Video
Topic: My Gravity Hybrid E-Bike
Replies: 3
Views: 1172

Re: My Gravity Hybrid E-Bike

Very nice. Where did you buy all the parts from? Oh my gosh...all over the place, and some were from previous builds or new stuff I bought and squirreled away. The more recent parts just for this build: Frame-Craigslist Fork-Online bike store, Tree Fort I think Headset-Ebay Disc Brakes-Ebay Rear wh...
by Russell
Apr 24 2015 11:23pm
Forum: E-Bike Technical
Topic: brake cut off wiring?
Replies: 16
Views: 1471

Re: brake cut off wiring?

There are two types of e-brake levers that I know of, the first have 2 wires and are simple switches which open and close, the other are 3-wire type which use a hall-effect device and have +5V,GND and signal wires. On most of my controllers there are two wires for cruise control. If you join them to...
by Russell
Apr 24 2015 10:55pm
Forum: E-Bike Technical
Topic: Bit of a clunk from my Bafang
Replies: 6
Views: 721

Re: Bit of a clunk from my Bafang

For reference this is what a small Bafang clutch looks like when it's opened up (after drilling out the fasteners).
Bafang_clutch.jpg
Bafang_clutch.jpg (77.46 KiB) Viewed 601 times
And here is where you can get a new one;

http://www.greenbikekit.com/accessories ... tches.html

-R
by Russell
Apr 24 2015 3:36pm
Forum: E-Bike Build Threads / Photos & Video
Topic: My Gravity Hybrid E-Bike
Replies: 3
Views: 1172

My Gravity Hybrid E-Bike

Another bike build for me as I continue to search for E-bike "perfection", or at least my idea of it. It started with the notion that I would build a multi-purpose bike using a 29'er disc frame and the Bafang mid-drive. I picked up the bare frame off of craigslist. It can handle some of the biggest ...
by Russell
Apr 23 2015 1:21am
Forum: E-Bike General Discussion
Topic: Advice on full e-bike build for someone new to the field
Replies: 55
Views: 4871

Re: Advice on full e-bike build for someone new to the field

First, start reading the WIKI;

http://www.endless-sphere.com/w/index.php/Main_Page

...also determine how much it is you want to spend.

-R
by Russell
Apr 22 2015 7:34pm
Forum: E-Bike General Discussion
Topic: best fork for front motor?
Replies: 13
Views: 2035

Re: best fork for front motor?

Thanks for all the answers. Yes steel for is a must, but which one? I'm thinking one with suspension may be better? It does seem that the Rockshox XC32 fork are the best? I don't know about surly fork (I am in the uk) And the point of my post was to show you there is NO ONE BEST fork. I've used 5 d...
by Russell
Apr 22 2015 11:14am
Forum: E-Bike General Discussion
Topic: best fork for front motor?
Replies: 13
Views: 2035

Re: best fork for front motor?

I have built a number of front motor E-bikes and used STEEL FORKS on all of them. I have ridden them thousands of miles without any problems. The KEY I'd say is proper fit and attention to detail. Here is one of my early bikes which I used small torque arms screwed to the front rack/fender braze-on...
by Russell
Apr 21 2015 11:16am
Forum: E-Bike Reviews & Testing
Topic: YOUE 250W Geared Motor review
Replies: 13
Views: 5105

Re: YOUE 250W Geared Motor review

Using the following assumptions:

160 cm diameter (20")
48V nominal

RPM = 36 km/h x 100,000 cm/km x 1 h/60 min x 1 R/160 cm = 375

375RPM / 48V = 7.8 RPM

So yes your RPM is very close to what I got.

-R
by Russell
Feb 05 2015 4:37pm
Forum: E-Bike Non-hub Motor Drives
Topic: New Bafang Crank-Drives
Replies: 4435
Views: 709277

Re: New Bafang Crank- DRives

My Cannondale 29er has a 46T chainring and 34T-11T cassette and will pull my 235lbs up the 17% hills round here no problem. I also ride the local forest trails and it copes perfectly. I am very unfit and currently average 21Wh/m. I decided to check my cadence on a flat road in 7th gear(out of 8) an...
by Russell
Jan 31 2015 10:02am
Forum: Items for Sale - Used
Topic: SOLD rear direct drive wheel/hub - USA
Replies: 37
Views: 6562

Re: Hub motors/wheels. Will ship USA

veloman wrote:
Older Ezee geared hub, bought from Grin. Works well, has light use, maybe 300 miles. Wheel is true, good condition. (A tad lighter than the Mac, not as powerful). $160
What size wheel?
Front or rear?
Fast or slow winding?

-R
by Russell
Oct 25 2014 5:04pm
Forum: Battery Technology
Topic: Battery recharging on its own! NOT a Halloween story!
Replies: 18
Views: 1524

Re: Battery recharging on its own! NOT a Halloween story!

I don't see anything wrong with the way the batteries are connected. Are the batteries new or used? If used I would only combine them if they are closely matched. Also completely charge each 12V battery individually before connecting them in series. Then make sure the voltage of each series group is...
by Russell
Oct 03 2014 8:52pm
Forum: E-Bike Technical
Topic: 36V14.5Ah Bottle-09 Panasonic - Sine Wave?
Replies: 11
Views: 2039

Re: 36V14.5Ah Bottle-09 Panasonic - Sine Wave?

So... That's just a little sine wave controller and NOT a substitute for an actual motor controller with hall sensors, speedo and the like, but used as and ADDITION to, if I've got this even a little bit right. No, it's a real controller but instead of it being in a separate rectangular box it happ...
by Russell
Sep 26 2014 11:16pm
Forum: E-Bike Technical
Topic: What controller will run an Ezee geared sensorless?
Replies: 3
Views: 415

Re: What controller will run an Ezee geared sensorless?

I thought you had a bunch of "KUxx" controllers. I presently run all 3 of my bikes with geared motors sensorless with them. My BPM does get noisy right at 25.0 mph but it did that when I ran it sensored too. I didn't like the latest version KU93 at first but it runs great with my YOUE 250W geared mo...
by Russell
Sep 26 2014 9:42am
Forum: Stand-up E-scooters and E-skateboards
Topic: Anti spark XT90 connectors
Replies: 46
Views: 10427

Re: Anti spark XT90 connectors

Of course it depends on the size caps in your controller but 100 ohms would be fine for 100V. I'm using 50 ohm for a 12S pack w/main caps of 470-1000uF. Peak current of 1A for a tiny fraction of a second.

-R
by Russell
Sep 25 2014 11:42pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Anti spark XT90 connectors
Replies: 46
Views: 10427

Re: Anti spark XT90 connectors

itchynackers wrote:It doesn't really give any information on what wattage/resistance these are. I currently have a 1000ohm 10 watt resistor for my 100V setup. Not sure if this would work or not.
Why so big?



-R
by Russell
Sep 25 2014 11:26pm
Forum: Battery Technology
Topic: voltage sag
Replies: 5
Views: 824

Re: voltage sag

ALL bottle type batteries are going to have significant voltage sag under load because of the cells they use. My "bottle" battery uses Panasonic 18650 29E cells in a 4P13S configuration and it sags badly compared to LiPo.

-R
by Russell
Sep 25 2014 11:16pm
Forum: Battery Technology
Topic: voltage sag
Replies: 5
Views: 824

Re: voltage sag

So I have 2 batteries, a 36v from greenbikekit.com and a 48v from conhismotor. Both are "dolphin" or "water kettle" style batteries. The 36v has noticeable sag after a short time, whereas the 48v has none. Superior battery construction or simply one is stronger than the other? All batteries sag und...
by Russell
Sep 25 2014 2:26pm
Forum: E-Bike Technical
Topic: Electra Townie build advice
Replies: 20
Views: 2142

Re: Electra Townie build advice

A Cycle Analyst gives the most info plus it has a number of other features that are great if you use them. For several reasons I never owned one: 1) I exclusively have geared motors so the speed function does not work for me, 2) I've only ever owned one controller with a direct-connect CA connector ...