Search found 84 matches

by multifrag
Oct 21 2018 7:55am
Forum: Battery Technology
Topic: ULtra Compact 1800W charger + Eltek programming
Replies: 264
Views: 34694

Re: ULtra Compact 1800W charger + Eltek programming

I'm trying to figure out which of the 4 pins on the flatpack S are can L and H. I have flatpack HE working and used this image for pinout, but for flatpack S I can't find a similar image. Closest I could find is this and it looks like Can L and H are suppose to be pins 3 and 4. Just wanted to check ...
by multifrag
Sep 30 2018 5:18pm
Forum: E-Bike Technical
Topic: Intermittent hall sensor problem
Replies: 4
Views: 171

Re: Intermittent hall sensor problem

TommyCat wrote:
Sep 30 2018 4:00pm
Intermittent is the worst! :( Come to a stop or jerk at speed... I'd start with disconnecting the brake switches first...
I don't have any attached. The controller has no regen, so didn't bother modifying hydraulic brakes i already had installed
by multifrag
Sep 30 2018 4:47am
Forum: E-Bike Technical
Topic: Intermittent hall sensor problem
Replies: 4
Views: 171

Re: Intermittent hall sensor problem

What does the battery voltage do when this happens? Is it happening at any particular place in the ride? I mean, such that conditions during the ride at that point or just before it could be causing it? If it is a hall issue, and you actually have to wait for it to recover, then heat is a possible ...
by multifrag
Sep 29 2018 11:33am
Forum: E-Bike Technical
Topic: Intermittent hall sensor problem
Replies: 4
Views: 171

Intermittent hall sensor problem

I have occasions when the hub motor would just drive into halt or start to jerk while at speed. I figured it was one of the hall sensor going bad. Checked if they react to magnet polarity and all of them do. Checked the wiring for broken or loose wire. All seem to work with out a problem. That leave...
by multifrag
Aug 20 2018 4:28pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Around the world on a solar ebike
Replies: 111
Views: 5059

Re: Around the world on a solar ebike

What about a recumbent? It has a similar position and aerodynamic advantage over normal road bike position. You can pack it into a normal bicycle box. The only problem is stop and start is more difficult, but you can get used to it. Some recumbent even come with a tear shaped back end compartment T...
by multifrag
Aug 20 2018 4:00pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Around the world on a solar ebike
Replies: 111
Views: 5059

Re: Around the world on a solar ebike

"velomobile"?... Looking at the speed and distance covered by people touring in velomobiles, I couldn't help but notice that they were similar to what I was doing with an ebike except they didn't have a motor or batteries that needed constant charging. I even flew to Holland to test ride a Mango ve...
by multifrag
Jul 25 2018 2:13pm
Forum: Endless-Sphere Wiki
Topic: How many of you really use the wiki?
Replies: 68
Views: 6010

Re: How many of you really use the wiki?

It's a shame wiki platform didn't work out. It was a good tool to send newcomers for more info on the subject.
by multifrag
Jul 15 2018 6:41am
Forum: E-Bike Technical
Topic: What is normal voltage deviation between series connection?
Replies: 4
Views: 163

Re: What is normal voltage deviation between series connection?

Not much to worry about like that for static voltage tests. What do you get under load during discharge? And during charge at various points? Both discharging at 20A and charging at 5A had a deviation of 0.01V. I usually charge my battery to 4.1V, but from time to time I fully charge it to let it b...
by multifrag
Jul 14 2018 10:26am
Forum: E-Bike Technical
Topic: What is normal voltage deviation between series connection?
Replies: 4
Views: 163

What is normal voltage deviation between series connection?

I've checked my series connection one by one and I've noticed that the deviation went from two series having -0.01V to multiple series going +/- 0.02. Average come ~4.2V fully charged, but 1S and 14S have a difference of 0.05V. Cells voltage as of right now: 1S 4.17V-------8S 4.20V 2S 4.20V-------9S...
by multifrag
Jun 20 2018 7:12am
Forum: Battery Technology
Topic: 3d printer filament in battery pack
Replies: 12
Views: 400

Re: 3d printer filament in battery pack

PLA can be annealed to achieve 150C temperature before going soft. Have you tested your battery for peak temperature as having your battery stay at over 60C is detrimental for its longevity. Think about printing position, the case will be most its weakest in between the layers. Maybe 3d print a mold...
by multifrag
Mar 20 2018 9:39am
Forum: E-Bike Build Threads / Photos & Video
Topic: Single-speed track stealth ultralight
Replies: 201
Views: 14159

Re: Single-speed track stealth ultralight

I'm planning on changing out my standard bars for some bull horn bars. In anticipation of that change, I figured out how to make a 3-button throttle today. The idea is that the three buttons would be next to each other on the bars. You press button-1 to get 30% throttle, you press button-1 + button...
by multifrag
Mar 08 2018 4:49pm
Forum: E-Bike Technical
Topic: Hub motor noise/controller problems. Only works for couple seconds
Replies: 11
Views: 366

Re: Hub motor noise/controller problems. Only works for couple seconds

I wish they made a XT90 size version of the 3 pin connector. 3D printer? I'd love some xt90 size one also. Plausible, but I would 3dprint it, make a cast, insert the contacts and pour the plastic in. Otherwise you would have to print thicker walls and bake it in the oven for better temperature resi...
by multifrag
Mar 08 2018 1:16pm
Forum: E-Bike General Discussion
Topic: 15000 miles today
Replies: 29
Views: 1401

Re: 15000 miles today

Had my fair share of accidents but nothing as serious as yours. I did 3000 miles on my hub drive and changed 1x freewheel and 1x chain, switch to BBS02 for the look of smaller drive(stealth) and chewed through 6x chains, 3x cassettes and 2x Chainrings in the same 3000 miles...
by multifrag
Mar 08 2018 11:20am
Forum: E-Bike Technical
Topic: Hub motor noise/controller problems. Only works for couple seconds
Replies: 11
Views: 366

Re: Hub motor noise/controller problems. Only works for couple seconds

skeetab5780 wrote:
Mar 08 2018 9:14am
I would separate those three phase wires just for piece of mind...even if they are isolated from one another it just scares me
It's a 3 pole connector MT60. Just like xt60 we use for batteries. (https://goo.gl/q4Juas) So not sure what could scare you :)
by multifrag
Mar 08 2018 6:24am
Forum: E-Bike Technical
Topic: Hub motor noise/controller problems. Only works for couple seconds
Replies: 11
Views: 366

Re: Hub motor noise/controller problems. Only works for couple seconds

Can't test the halls themselves. There's a good how-to on http://ebikes.ca in the Learn / Troubleshooting tab. Thank you very much for the help. I have tested all the wires for short circuit and my waterproof cable had 2 pins in short. Would have never guessed its possible but glad I've checked.
by multifrag
Mar 07 2018 5:16pm
Forum: E-Bike Technical
Topic: Hub motor noise/controller problems. Only works for couple seconds
Replies: 11
Views: 366

Re: Hub motor noise/controller problems. Only works for couple seconds

SlowCo wrote:
Mar 07 2018 5:10pm
How are you powering this? With an old battery that sags so much that the controller shuts down as the LVC kicks in and then goes again etc?
With the battery that works just fine on bafang bbs02. Charged to 50v right now, so not the battery
by multifrag
Mar 07 2018 4:25pm
Forum: E-Bike Technical
Topic: Hub motor noise/controller problems. Only works for couple seconds
Replies: 11
Views: 366

Re: Hub motor noise/controller problems. Only works for couple seconds

Are you certain you have the right phase/hall wiring combination? If not you will want to either use the self-learn jumper function of the controller, if it has one, or look up the How to determine the wiring for a brushless motor thread or wiki article and find the right combo for it. If that stil...
by multifrag
Mar 07 2018 2:54pm
Forum: E-Bike Technical
Topic: Hub motor noise/controller problems. Only works for couple seconds
Replies: 11
Views: 366

Hub motor noise/controller problems. Only works for couple seconds

Brought back from the dead an old project of mine. Rewired all the cables and powered it up. Surprise, surprise it does not work as expected. Does not want to start from standstill and when given a push it only works for an instant before the throttle gets unresponsive and I have to reset the thrott...
by multifrag
May 17 2017 2:43pm
Forum: Motor Technology
Topic: Idiots guide to rewinding Revolt 120 pro
Replies: 295
Views: 25419

Re: Idiots guide to rewinding Revolt 120 pro

Received a new bike light: https://m.banggood.com/DC9-85V-20W-2000lm-Motorcycle-LED-Hung-out-Headlight-With-USB-Charger-Lamp-p-1095321.html?rmmds=orderdetail Actually looks like an ok product, well packaged, brackets seem to be stainless. It'll be a while before i mount it though. image.jpeg image....
by multifrag
May 16 2017 6:22pm
Forum: Battery Technology
Topic: Fuse-wire for individual cells, DIY Tesla style
Replies: 83
Views: 10834

Re: Fuse-wire for individual cells, DIY Tesla style

There is the risk, when main current transmission path in mind, red glowing pre blowing cooper fuse could liquefy pretty big chunk of solder and this droop can flow somewhere you do not want it. I do agree about not wanting the blobs of solder getting down the vent of the cell, but I just can't rea...
by multifrag
May 16 2017 5:35pm
Forum: Battery Technology
Topic: Fuse-wire for individual cells, DIY Tesla style
Replies: 83
Views: 10834

Re: Fuse-wire for individual cells, DIY Tesla style

I understand that soldering would be pretty bad for the battery, but just thinking if spotwelding S shaped nickel strip and soldering the fuse wire to it would fix this problem. The main benefit of soldering is replacing the battery in something like the powerwall would be easy. Instead of cutting ...
by multifrag
May 16 2017 5:14am
Forum: Battery Technology
Topic: Fuse-wire for individual cells, DIY Tesla style
Replies: 83
Views: 10834

Re: Fuse-wire for individual cells, DIY Tesla style

I understand that soldering would be pretty bad for the battery, but just thinking if spotwelding S shaped nickel strip and soldering the fuse wire to it would fix this problem. The main benefit of soldering is replacing the battery in something like the powerwall would be easy. Instead of cutting t...
by multifrag
Mar 16 2017 10:03am
Forum: E-Bike Technical
Topic: Using slider Pot instead of thumb throttle?
Replies: 7
Views: 613

Re: Using slider Pot instead of thumb throttle?

Finally finished the idea. Was riding with the thumb throttle for a while. Now that I had some free time managed to attach the slide pot and configure the software. I think it looks very clean. Nobody was able to spot that there is something wrong with the gear lever not to mention no that bit of pl...
by multifrag
Mar 08 2017 7:58am
Forum: E-Bike Build Threads / Photos & Video
Topic: Nyx frame, 273mm*40m V3 hub, and 650A
Replies: 162
Views: 18857

Re: Nyx frame, 273mm*40m V3 hub, and 650A

Impressive build! Can't wait to see it finished. The only part I'm a bit concerned is your tire choice. Having a lot of power at the wheel but wasted through the tire because of lack of grip is not ideal, specially for 1/4 mile.
by multifrag
Feb 17 2017 12:28pm
Forum: Battery Technology
Topic: New Samsung cell 33G
Replies: 34
Views: 5571

Re: New Samsung cell 33G

I wouldn't trust the image as the company ''Imren'' seems to re-bag other cells. They're selling ''their own'' 3000mah ''40A'' discharge cell
http://gaodmei.en.alibaba.com/product/6 ... msung.html