Search found 1911 matches

by Voltron
Dec 07 2019 2:24pm
Forum: E-Bike Non-hub Motor Drives
Topic: M600/M500 Crank Arm missing need help!
Replies: 5
Views: 152

Re: M600/M500 Crank Arm missing need help!

The threads for the pedal hole are left hand on the left crank, and right hand on the right crank. Putting the wrong one on the wrong side makes the pedal unscrew while you're riding until it gets unscrewed enough to rip out the final few threads, ruining the crank. That's how it signifies :thumb: :D
by Voltron
Dec 07 2019 12:00pm
Forum: E-Bike General Discussion
Topic: Is a leisurely pedal cadence possible going 25 mph on an ebike?
Replies: 8
Views: 208

Re: Is a leisurely pedal cadence possible going 25 mph on an ebike?

I went with a 55 tooth. Very pleasant at 28-33ish. Just took grinding some plastic of the battery case, and a little sledgehammering to flatten the frame behind it a bit. 😉 IMG_20190222_122105.jpg The 175mm cranks give you some leverage too... a couple of weeks ago I actually broke one of those blac...
by Voltron
Dec 07 2019 11:43am
Forum: E-Scooter and Motorcycle General Discussion
Topic: HELP a noob pls- Replacing my burnt controller 60V
Replies: 5
Views: 124

Re: HELP a noob pls- Replacing my burnt controller 60V

Drag that goes away when unplugged is usually on the way from the motor to the controller somewhere. If you're lucky, maybe the phase wires melted a little and are shorting, so if that is it sometimes the controller still works after fixing the wires. Next is maybe blown component in the controller....
by Voltron
Dec 07 2019 5:01am
Forum: General Discussion
Topic: 12v battery liquid
Replies: 4
Views: 84

Re: 12v battery liquid

Or you stirred up crud at the bottom that's been shed off the plates, and it's internally shorting. Also, did you use a hydrometer on it yet?
by Voltron
Dec 06 2019 9:43pm
Forum: E-Bike Non-hub Motor Drives
Topic: M600/M500 Crank Arm missing need help!
Replies: 5
Views: 152

Re: M600/M500 Crank Arm missing need help!

Is it the left or the right? It matters a bunch...
by Voltron
Dec 06 2019 5:57pm
Forum: E-Bike General Discussion
Topic: Logo with Reversed "R" and a B: Help to Identify This Bike
Replies: 7
Views: 209

Re: Logo with Reversed "R" and a B: Help to Identify This Bike

You may never find a brand.. lots of those get made and sold under some random name that keeps changing. But that one is your basic really really cheap fat bike. Steel, easy to bend cranks, the lowest grade cable disc brake (that can be hard to find pads for), three piece steel stamped together hubs..
by Voltron
Dec 05 2019 12:26pm
Forum: Battery Technology
Topic: Rebuilding scooter battery
Replies: 7
Views: 131

Re: Rebuilding scooter battery

And re the balance taps, I would say they're essential for either... But they are themselves a potential source of short circuits if not done right. I think you would be surprised by the extended life of a sla pack actually kept in balance. It's great practice anyway before stepping into a split lit...
by Voltron
Dec 05 2019 12:17pm
Forum: Battery Technology
Topic: Rebuilding scooter battery
Replies: 7
Views: 131

Re: Rebuilding scooter battery

The switching to lithium plan maybe depends on how much the pack is going to be checked by someone. Lithium is much more dangerous, especially when you get into multiple split packs. It creates more ways to have overcharging and undercharging going on, maybe at the same time across the pack, both of...
by Voltron
Dec 04 2019 8:07pm
Forum: Battery Technology
Topic: Rebuilding scooter battery
Replies: 7
Views: 131

Re: Rebuilding scooter battery

https://endless-sphere.com/forums/viewtopic.php?f=14&t=102289&start=50 This guy built his own balance leads coming from the batteries so he could check and charge them without opening up the body panels on his scooter. WhatsApp Image 2019-09-20 at 14.01.06.jpeg WhatsApp Image 2019-09-20 at 13.58.38....
by Voltron
Dec 04 2019 8:00pm
Forum: Battery Technology
Topic: Rebuilding scooter battery
Replies: 7
Views: 131

Re: Rebuilding scooter battery

They make LiFePo chemistry lithium batteries that are a drop in replacement for 12v sealed lead. The lithium ion phosphate chemistry runs at a different voltage that regular lithium, that is close enough to less acid voltage to work. It didn't have the energy density of regular lithium, but way bett...
by Voltron
Dec 01 2019 12:31am
Forum: General Discussion
Topic: Can anyone identify this?
Replies: 5
Views: 257

Re: Can anyone identify this?

If it was taped to the side, and had two wires, it was almost def a temp sensor. For ni-cad in particular, the battery temp was important for the charging algorithm.
by Voltron
Nov 30 2019 2:22pm
Forum: E-Bike Technical
Topic: Why doesn't a li-ion battery take load?
Replies: 24
Views: 741

Re: Why doesn't a li-ion battery take load?

I'd wager it would need about 4 or 5 in parallel to not sag too much.
And have you actually metered the amp draw during acceleration? I was surprised to find my 20 amp rated controller was pulling close to 40 amps briefly during pullouts.
by Voltron
Nov 30 2019 12:58pm
Forum: E-Bike Technical
Topic: Why doesn't a li-ion battery take load?
Replies: 24
Views: 741

Re: Why doesn't a li-ion battery take load?

There's a nice YouTube vid of a guy cutting ripoff cells open, and inside was a tiny lithium battery wired in to make voltage... Packed in with enough ballast to make it about the right weight.
by Voltron
Nov 29 2019 11:13pm
Forum: E-Bike Technical
Topic: Bafang 20” motor in a 24” rim
Replies: 13
Views: 423

Re: Bafang 20” motor in a 24” rim

Don't know what your test bench setup is, but if you bolt it into a frame or a bench mount jig, then use a laser tachometer to get the rpms, you could figure out the kv (rpms/volt) and see if matches a spec sheet, before going to the trouble of lacing it up. images (6).jpeg They're like 10 or 20 buc...
by Voltron
Nov 29 2019 8:31pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: EVT 168 doesn't run
Replies: 4
Views: 395

Re: EVT 168 doesn't run

Every time I've seen a motor do a partial turn and then stop it's been Hall sensor related. Either one burned out, or a wire got pinched. If you know how to use a volt meter, and have steady hands or an assistant, and you can get at the Hall wires plug, there should be 5ish volts on the red and blac...
by Voltron
Nov 28 2019 11:52pm
Forum: E-Bike General Discussion
Topic: Can I wire two Pre built 36v packs in series to make 72v
Replies: 19
Views: 490

Re: Can I wire two Pre built 36v packs in series to make 72v

The OP didn't say exactly why he wanted to go 72v, but if it's to get more rpm out of his motor, more ah won't help.

And his 36v packs are 12ah, so not sure how a 9-10ah one will help?
by Voltron
Nov 28 2019 11:48pm
Forum: E-Bike General Discussion
Topic: Helmet bike mounted cameras
Replies: 14
Views: 1043

Re: Helmet bike mounted cameras

They sell front and rear lights that also have a camera built into them... There's lots of cynicism about whether anybody will do anything, but if it catches even one dumbass angry driver purposely hitting someone and leaving them unconscious or dead with no evidence, I'm all for it.
by Voltron
Nov 26 2019 10:16pm
Forum: E-Bike General Discussion
Topic: Can I wire two Pre built 36v packs in series to make 72v
Replies: 19
Views: 490

Re: Can I wire two Pre built 36v packs in series to make 72v

Another plus is charging, 36v chargers are cheap and easy to get. And if you're in a hurry, easy to drop the time by running a charger to each sub pack. This was for 2 modules.... But I did spend a good bit of time tweaking the chargers to get exactly matching voltage cutoff, so the sub packs would ...
by Voltron
Nov 26 2019 10:08pm
Forum: E-Bike General Discussion
Topic: Can I wire two Pre built 36v packs in series to make 72v
Replies: 19
Views: 490

Re: Can I wire two Pre built 36v packs in series to make 72v

Like stated already, maybe, depending on the BMS. But the concept is just fine... I run several 36v doubled up packs. It's a great way to give 72v to a motor that could use some more volts for some more rpms with cheap, easy to get batteries and chargers. Now 72v is getting more available commercial...
by Voltron
Nov 26 2019 1:05pm
Forum: E-Bike Technical
Topic: hanging a battery
Replies: 11
Views: 542

Re: hanging a battery

Full suspension and rear racks don't always go well together... And for actual off-road riding, having the battery weight that high and that far back really really kills the handling...

This is the kind of bike the OP was talking about btw.
2006 Kona Coiler.jpg
2006 Kona Coiler.jpg (378.11 KiB) Viewed 302 times
by Voltron
Nov 25 2019 11:09am
Forum: General Discussion
Topic: Voilamart 1500w 26in rear hub install !
Replies: 13
Views: 483

Re: Voilamart 1500w 26in rear hub install !

so much for stealth 8-) Yeah, there's no hiding that freakshow. But the ride is so fast and perfectly balanced that my eyes are glued forward and I forget real fast how it looks 👍 XShgunSoW5o Feel free to skip ahead if you don't love hypnotic back and forth s turns as much as I do, but the final mi...
by Voltron
Nov 24 2019 5:33pm
Forum: General Discussion
Topic: Voilamart 1500w 26in rear hub install !
Replies: 13
Views: 483

Re: Voilamart 1500w 26in rear hub install !

Then there's this one for weekend fun... Modified Yuba Mundo cargo bike frame.
rolling heavy.jpg
rolling heavy.jpg (90.79 KiB) Viewed 385 times
That one is fuuuuunnn.
by Voltron
Nov 24 2019 5:31pm
Forum: General Discussion
Topic: Voilamart 1500w 26in rear hub install !
Replies: 13
Views: 483

Re: Voilamart 1500w 26in rear hub install !

The motor size is really the same... It's more of a controller side thing. My main ride is a recycled EV Global with modern battery, controller and motor... A giant plus was the dropouts are already deep enough for an ebike axle. IMG_20190222_122105.jpg That bike was made in 1998... That frame will ...
by Voltron
Nov 24 2019 2:58pm
Forum: E-Bike Technical
Topic: hanging a battery
Replies: 11
Views: 542

Re: hanging a battery

Spine protector batteries are going to be a big market I think.. I personally didn't, but my battery was fairly flat.