Search found 24899 matches

by amberwolf
Mar 19 2019 1:34am
Forum: E-Bike Technical
Topic: Hall Sensors'b'Gone
Replies: 211
Views: 9832

Re: Hall Sensors'b'Gone

The repaired axle survived today's work commute. I might have time Wed or Thu to work on rewiring it again.

I think I have a workable idea for a complete axle replacement using a tube with a tube clamp, and larger ID bearings with same OD. Gonna put it in my trike thread once I sketch it up.
by amberwolf
Mar 19 2019 1:23am
Forum: E-Bike General Discussion
Topic: Middrive Chain popping
Replies: 5
Views: 67

Re: Middrive Chain popping

I'd assume they start in the right gear. ;) Other ways to prevent it: Increase chain tension so it can't lift up over the teeth. This then wears the chain out faster at the pins. Increase derailer spring tension so it keeps the chain wrapped on the sprocket. This may make it harder to shift. (much h...
by amberwolf
Mar 19 2019 1:01am
Forum: Motor Technology
Topic: Development of a controller board for Electric vehicle.
Replies: 5
Views: 53

Re: Development of a controller board for Electric vehicle.

I don't want to dissuade you from trying, but to be realistic, it is quite a challenge to do this from scratch, with no knowledge at all of how anything works. Even people that already know quite a lot have had tremendous problems getting their controller designs working. It's not just about a schem...
by amberwolf
Mar 19 2019 12:44am
Forum: E-Bike General Discussion
Topic: How crazy am I
Replies: 2
Views: 63

Re: How crazy am I

No. Adding a set of charged cells in series with a discharged battery doesn't get you anything; the discharged battery is still discharged and still has to be recharged. EIther: Get a bigger battery (more Ah, same voltage) to replace the one you have, Or add a second battery in parallel with the fir...
by amberwolf
Mar 19 2019 12:38am
Forum: Motor Technology
Topic: Help Hookup MY1020 Motor & Controller for Go Kart
Replies: 1
Views: 30

Re: Help Hookup MY1020 Motor & Controller for Go Kart

This system seems to have a harness that leads to a set of other wires which is why I have attached a second picture below. There is no second picture, and nothing is attached. There is a single link to a site that gives me just a blank page except for thumbnails that couldn't be related to your po...
by amberwolf
Mar 19 2019 12:16am
Forum: E-Bike Non-hub Motor Drives
Topic: MY 1020 Controller Issues
Replies: 1
Views: 34

Re: MY 1020 Controller Issues

Hi, I'm building an electric go-kart using the MY 1020 motor or maybe a clone of it. But unfortunately, I can't seem to get the motor to run at all. Not even powering up. Unless yours is a type I have never seen, the MY1020 is a brushed motor (only two wires), so it is incompatible wiht the control...
by amberwolf
Mar 18 2019 11:55pm
Forum: Battery Technology
Topic: connections without DIY welding / soldering
Replies: 2
Views: 83

Re: connections without DIY welding / soldering

YOu might want to read around the forums; there are a lot of existing threads for such things. One example search for no-weld solutions (no-weld isn't findable due to the "no-" but weld is, so easy to look at the titles....) https://endless-sphere.com/forums/search.php?keywords=weld&terms=all&author...
by amberwolf
Mar 18 2019 11:52pm
Forum: Motor Technology
Topic: Building an AC Motor
Replies: 2
Views: 83

Re: Building an AC Motor

And then once you build the motor, you then have to build a controller for it, and that will probably be even harder and more expensive than the motor to design and construct. You would probably be better off to find a wrecked EV of similar capabilities to what you want your car to do, and use it's ...
by amberwolf
Mar 18 2019 11:40pm
Forum: E-Bike Technical
Topic: Why plugs are these?
Replies: 2
Views: 71

Re: Why plugs are these?

butters149 wrote:
Mar 18 2019 1:47pm
Hello, does anyone know what plugs these are? They are used to connect to my headlight.
Since you have not attached an image or provided a link to your kit, we have absolutely no way of knowing what plugs you are talking about. ;)
by amberwolf
Mar 18 2019 11:27pm
Forum: E-Bike General Discussion
Topic: hub motors, have you broken your rim/spokes yet
Replies: 4
Views: 92

Re: hub motors, have you broken your rim/spokes yet

his only concern (not one in my mind) is that the spokes and rim arent up to par. Most of the kit rims I've seen and owned are inadequate for the spoke gauge used; typically they use 12g spokes on the cheapest bicycle rims they can get, so the rims are not strong enough to hold the spoke tension ev...
by amberwolf
Mar 18 2019 10:27pm
Forum: E-Vehicles General Discussion
Topic: Is there a way to charge my scooter when I am on the road?
Replies: 5
Views: 78

Re: Is there a way to charge my scooter when I am on the road?

I don't live in a big city and have to drive through rural area where there is no power outlet. :( https://endless-sphere.com/forums/search.php?keywords=range+extend*&terms=all&author=&sc=1&sf=titleonly&sr=topics&sk=t&sd=d&st=0&ch=300&t=0&submit=Search https://endless-sphere.com/forums/search.php?k...
by amberwolf
Mar 18 2019 10:00pm
Forum: Items for Sale - Used
Topic: Monster E-BIKE
Replies: 2
Views: 129

Re: Monster E-BIKE

tomgda wrote:
Mar 18 2019 4:29am
Bike 100% efficient
Nothing is 100% efficient.

If you want to claim an efficiency, you should test it and post the testing procedure as well as the results in various situations, as it will have different efficiencies under different conditions.
by amberwolf
Mar 18 2019 9:54pm
Forum: E-Vehicles General Discussion
Topic: Sevcon Replacement and Programming (Help)
Replies: 1
Views: 31

Re: Sevcon Replacement and Programming (Help)

If the old controller is identical to the new one, then AFAIK (Based on implications of several threads around ES) you can download a DVT file from the old one, and upload it to the new one, to set it the same way. I don't know if there is anything special you have to do to accomplish this, or to en...
by amberwolf
Mar 18 2019 9:40pm
Forum: E-Bike General Discussion
Topic: Middrive Chain popping
Replies: 5
Views: 67

Re: Middrive Chain popping

higher gears have less sprocket teeth engaging the chain in the back, so the harder the chain pulls on it the more likely it is to slip.
by amberwolf
Mar 18 2019 12:44am
Forum: Battery Technology
Topic: Dual Motor Battery Pack- Single or Double
Replies: 5
Views: 103

Re: Dual Motor Battery Pack- Single or Double

One big pack is easier on the cells.
by amberwolf
Mar 18 2019 12:39am
Forum: E-Bike Technical
Topic: Hall Sensors'b'Gone
Replies: 211
Views: 9832

Re: Hall Sensors'b'Gone

I disconnected the CA's throttle output, so only the hand throttle is runing the SFOC. Easier to control exactly what power it makes then, but it does still get the judder, and the shutdown (and once an overcurrent, when the below happened) error code, if I do push throttle too far up while above ar...
by amberwolf
Mar 17 2019 11:47pm
Forum: E-Bike Technical
Topic: $14.99 72v Sunwin Controller
Replies: 482
Views: 43419

Re: $14.99 72v Sunwin Controller

They just engage whatever braking method the controller has enabled / programmed, whether that be simply stopping motor operation, or regen, or eabs, or some other thing.
by amberwolf
Mar 17 2019 12:50am
Forum: E-Bike Technical
Topic: Hall sensor problems, i guess
Replies: 10
Views: 157

Re: Hall sensor problems, i guess

Hall sensors don't output any voltage, they only short it to ground when on, and the output is floating when off. A pullup resistor (usually to the 5v source) inside the controller on each signal line brings the output up essentially to the supply voltage. If you disconnect the halls from the contro...
by amberwolf
Mar 17 2019 12:33am
Forum: E-Bike General Discussion
Topic: Bicycle brakes versus motorcycle
Replies: 8
Views: 206

Re: Bicycle brakes versus motorcycle

Hi all i'm building a high powered e bike. I am unsure if normal bicycle disc brakes will be enough to stop me if i'm going high speeds. Depends. What do *you* call "high-powered"? What do *you* call "high speeds"? What is the total mass being stopped? What kind of tires/wheels? (if there's not eno...
by amberwolf
Mar 17 2019 12:16am
Forum: Battery Technology
Topic: How measure capacity of LI-ION pack?
Replies: 8
Views: 144

Re: How measure capacity of LI-ION pack?

With Lithium packs, the Peukert effect is negligible. But even if it wasn't, you would need to discharge it at the rate you will be using it at in order to determine the actual usable capacity. If you test at a lower rate and it gives a higher capacity, that capacity is irrelevant, because you could...
by amberwolf
Mar 17 2019 12:00am
Forum: E-Bike Technical
Topic: Hall Sensors'b'Gone
Replies: 211
Views: 9832

Re: Hall Sensors'b'Gone

More testing on my commute today, and then a little more on a side trip to the store on the way home. If I turn the Cycle Analyst's speed limit down to 5mph (so it doesn't output any throttle above that speed), and use only the thumb throttle to control the SFOC/4503, then I can avoid the error 10 /...
by amberwolf
Mar 16 2019 11:30pm
Forum: Battery Technology
Topic: Scavenging one nearly new battery to make another?
Replies: 36
Views: 411

Re: Scavenging one nearly new battery to make another?

So I know I'm showing my ignorance here but that's 20 total 18650 Panasonic 18650 3400 mAh 3.7v batteries in four parallel groups. 20s means twenty cells in series. 4p means four sets of series cells placed in parallel. So you would need 20 * 4 = 80 cells to make a 20s 4p pack. As to whether that w...
by amberwolf
Mar 16 2019 11:12pm
Forum: E-Bike Technical
Topic: Any idea what this toggle is for?
Replies: 8
Views: 257

Re: Any idea what this toggle is for?

So I was right. ;)
by amberwolf
Mar 16 2019 11:06pm
Forum: Battery Technology
Topic: AliExpress battery pack unboxing
Replies: 71
Views: 2559

Re: AliExpress battery pack unboxing

I highly recommend crimping them, if you can get a good enough crimper. Otherwise, I would strip the wires to the length that will fill the contact's cup, interleave the strands of any multi-cable sets that use the same contact, and fit the strands into the cups, then use a heat gun on just the cont...
by amberwolf
Mar 16 2019 4:16am
Forum: Battery Technology
Topic: Scavenging one nearly new battery to make another?
Replies: 36
Views: 411

Re: Scavenging one nearly new battery to make another?

some guy on Amazon is selling a 10 pack of Pansaonic 3400 m ah 18650s for $80. But how many of those would I actually need to get to a usable 72 volts? At what current? You need to determine the max current your controller will ever draw. Then you need to determine the max current the cells themsel...