Search found 70 matches

by BDamari
Nov 27 2020 1:43pm
Forum: E-Bike Non-hub Motor Drives
Topic: M620/G510 beautiful frame
Replies: 2
Views: 58

Re: M620/G510 beautiful frame

I found a frame which I'm almost certain is made by the same manufacturer. However, it is not the version with the hidden battery shown here. Very nice and sleek frame indeed: https://www.alibaba.com/product-detail/29er-full-suspension-electric-bike-frame_60699376165.html?spm=a2700.details.deiletai6...
by BDamari
Nov 27 2020 11:42am
Forum: E-Bike Technical
Topic: Cracking noise under hard acceleration
Replies: 3
Views: 99

Re: Cracking noise under hard acceleration

My friend, chainstay is the bottom half of the swingarm on bicycles, maybe you have crack or damage there?


Image
by BDamari
Nov 25 2020 4:38pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Nukeproof Mega - GMAC - Nucular 12F trail/enduro build
Replies: 9
Views: 420

Re: Nukeproof Mega - GMAC - Nucular 12F trail/enduro build

Build looks great! But why use a 10000w controller on a 2600w peak motor? am I missing something?
by BDamari
Nov 25 2020 2:23pm
Forum: E-Bike General Discussion
Topic: Bottle mount battery wobbling
Replies: 2
Views: 85

Bottle mount battery wobbling

I'm using this Reention jumbo pack on my WIP townie conversion (will make build thread when done). The fit is excellent, and it matches the bike perfectly too, but it's wobbly, only laterally though. Sure a little wobble is essential to soak up shock and vibration but I'm afraid this is a bit too mu...
by BDamari
Nov 23 2020 2:51pm
Forum: E-Bike General Discussion
Topic: Frey with Innotrace?
Replies: 1
Views: 161

Re: Frey with Innotrace?

Sounds like the warranty is there mainly because of the hit-or-miss controller, motors themselves can last for years and even decades if you keep them within their limits (not what the manufacturer claims :)). Mid drives do have an additional failure point which is the reduction gears, which eventua...
by BDamari
Nov 23 2020 12:20pm
Forum: Battery Technology
Topic: Best way to do this?
Replies: 15
Views: 449

Re: Best way to do this?

As long as the connection is mechanically strong and can deliver as much amps as the batteries can without overheating, it's a good connection. You can crimp, solder or use connectors. If you solder, make sure you use enough solder, and if you use connectors just make sure the connectors can deliver...
by BDamari
Nov 22 2020 1:41pm
Forum: E-Bike Technical
Topic: 20" bicycle rim / 16" moped rim, 50mm+ wide
Replies: 13
Views: 316

Re: 20" bicycle rim / 16" moped rim, 50mm+ wide

I think you're better off modifying the rear end to support wider wheels. Of course, it's the harder solution but it's ultimately simpler and more practical. Replacing rims like that is surely more expensive (and mainly troublesome) in the long run, no? After you do that you can use fat bike wheels,...
by BDamari
Nov 22 2020 6:33am
Forum: E-Bike General Discussion
Topic: Ebike ignition
Replies: 2
Views: 161

Re: Ebike ignition

If your controller's e-lock line is just one cable, then it needs to connect to battery positive in order to "start" the controller. That means one line of the key switch (doesn't matter which one) goes to the battery positive and the other goes to the e-lock line. This is correct for most...
by BDamari
Nov 18 2020 2:36pm
Forum: E-Bike Technical
Topic: More controller problems :/
Replies: 0
Views: 74

More controller problems :/

The motor spins but has minor noticeable vibration, and the throttle is acting super weird. Under normal acceleration, the wheel speeds up normally but when I lay on the power again while coasting, I get FULL power for a few milliseconds, this sends an uneasy jolt of torque throughout the bike, then...
by BDamari
Nov 15 2020 3:53pm
Forum: E-Bike Technical
Topic: Blown votol em100
Replies: 4
Views: 221

Re: Blown votol em100

We can't really tell anything if we can't see inside the controller, you're gonna have to open it and show us a picture of the insides.
I don't have much experience but what you're describing sounds relatively... catastrophic :confused:
by BDamari
Nov 15 2020 2:39am
Forum: E-Bike Technical
Topic: What is the field weakening ratio?
Replies: 0
Views: 89

What is the field weakening ratio?

I started seeing this specification on Votol controllers, and it ranges from 150%-300%, depends on the model.
Is this the maximum multiplier of the unloaded RPM?
Please explain.
by BDamari
Nov 12 2020 3:25pm
Forum: E-Vehicles General Discussion
Topic: Votol EM-200 Controller
Replies: 51
Views: 5052

Re: Votol EM-200 Controller

larsb wrote:
May 20 2020 3:06am
if you only want 40mph top speed then the 3000W motor is enough for most applications, if you gear 1:8 you'll have up to 450-500Nm at the rear wheel
Goodness, that's enough to twist the swingarm like a wet floor cloth.
Make sure to send pictures of the aftermath!
by BDamari
Nov 08 2020 9:53am
Forum: E-Bike Technical
Topic: Sabvoton/Risunmotor controller programming help!
Replies: 13
Views: 1085

Re: Sabvoton/Risunmotor controller programming help!

Does anyone know if these are rebranded sabvotons or just clones/fakes?
by BDamari
Nov 07 2020 4:00am
Forum: Battery Technology
Topic: Help with LG chem Batteries
Replies: 5
Views: 253

Re: Help with LG chem Batteries

It looks mostly like adhesive residue, no dents or punctures in the body... :shock: There iss a crease right down the middle ! But i assume this is just a sample to show the codes ? I thought so too my friend, but look at the edge of the cell's body just before the terminals, that's not an inward c...
by BDamari
Nov 06 2020 3:30pm
Forum: Battery Technology
Topic: Help with LG chem Batteries
Replies: 5
Views: 253

Re: Help with LG chem Batteries

That cell looks beat up as hell, hope the rest don't look like that. The only way to find the Ah rating for sure is with a capacity meter/Battery capacity tester. It looks mostly like adhesive residue, no dents or punctures in the body... To op: capacity test it, round off the Ah number and google ...
by BDamari
Oct 30 2020 2:13am
Forum: E-Bike Technical
Topic: Help making cheap ebike controller fucntion
Replies: 1
Views: 132

Re: Help making cheap ebike controller fucntion

Perhaps it's meant to connect to a display, which has buttons on it? (including on/off button)
by BDamari
Oct 26 2020 3:36pm
Forum: Battery Technology
Topic: 18650 supplier rant
Replies: 8
Views: 314

Re: 18650 supplier rant

Ditto ... Try to get in touch with Micah Toll ... https://www.wired.com/2013/07/diy-e-bike/ https://electrek.co/author/micahltoll/ https://muckrack.com/micah-toll If anyone would know a way to ship 18650s to Israel it would be Micah. A passionate DIYer and very nice guy. Contact Micah Toll, who ret...
by BDamari
Oct 26 2020 2:01pm
Forum: Battery Technology
Topic: 18650 supplier rant
Replies: 8
Views: 314

Re: 18650 supplier rant

Could it be that Israel prohibits import due to possible hazard restrictions (e-cig use and vaping)? Have you called NKON to find out why they won't ship Lilo's to Israel or is it that it's just to expensive for the average consumer? There certainly must be thousands of e-bikes in Israel with 18650...
by BDamari
Oct 26 2020 11:51am
Forum: Battery Technology
Topic: 18650 supplier rant
Replies: 8
Views: 314

18650 supplier rant

I live in Israel. I've been looking for 2 years now, scouring the web, Alibaba, Google, global sources, and even this website. Absolutely nowhere have I found a single supplier that looks remotely trustworthy and sends new, genuine, grade A cells to Israel, not even tumich can send to me. I've been ...
by BDamari
Oct 20 2020 8:18am
Forum: E-Bike Technical
Topic: Motor can't spin from a stall, help please.
Replies: 4
Views: 175

Re: Motor can't spin from a stall, help please.

I'm wiring a brand new controller and motor, everything seems to work ok with no error code. However, when I try to give it throttle the wheel just moves a few degrees. When I crank the pedals and then give it throttle it spins, poorly, it vibrates and halts randomly. I tried to switch around the h...
by BDamari
Oct 20 2020 6:11am
Forum: E-Bike Technical
Topic: Motor can't spin from a stall, help please.
Replies: 4
Views: 175

Motor can't spin from a stall, help please.

I'm wiring a brand new controller and motor, everything seems to work ok with no error code. However, when I try to give it throttle the wheel just moves a few degrees. When I crank the pedals and then give it throttle it spins, poorly, it vibrates and halts randomly. I tried to switch around the ha...
by BDamari
Sep 26 2020 6:11am
Forum: Battery Technology
Topic: Electrolyte leak?
Replies: 3
Views: 323

Re: Electrolyte leak?

What type of cell how much voltage is in them ? If there's a charge in them they can make fire even in the recycling bin you could put a tail light from a car on there or a headlight in drain them. Or put them in a bucket of water.then salt and that will kill it . But your water will bubble green w...
by BDamari
Sep 23 2020 5:06am
Forum: Battery Technology
Topic: Electrolyte leak?
Replies: 3
Views: 323

Electrolyte leak?

I was salvaging cells and noticed corrosion/rust looking bumps creeping under the insulation.

Obviously I won't be using those cells in my projects, but are these ticking time bombs or just garbage?
https://imgur.com/a/rREF8kI
by BDamari
Sep 10 2020 5:29am
Forum: Battery Technology
Topic: Help me hunt down a faulty cell
Replies: 0
Views: 216

Help me hunt down a faulty cell

I'm in the process of building an ebike battery pack out of salvaged cells from medical battery packs. Unfortunately, one of the packs was full of dead cells, that gave a measuring of 1.3v per cell. I realized that way too late because I didn't bother to check the module for proper voltages. I had a...
by BDamari
Sep 04 2020 2:38am
Forum: Battery Technology
Topic: BMS heat issue?
Replies: 1
Views: 83

BMS heat issue?

I made a battery that is just enough to cram into the case I have, but the 60A Daly bms I'm using is 5mm too thick. To solve this problem I carefully removed the metal plates, and managed to make it thinner by 4mm, it's now not as waterproof but it's still covered in conformal coating so I'm not wor...