Search found 2222 matches

by Voltron
Feb 21 2021 11:35am
Forum: EBike Troubleshooting
Topic: Help with stray voltage
Replies: 17
Views: 230

Re: Help with stray voltage

Maybe it's a stupid test, but if you take the batteries out of the frame and put them on something next to the bike, is the voltage still there?
by Voltron
Feb 21 2021 10:22am
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 46
Views: 4829

Re: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor

Not even these?🤣 The new Americas Cup 75' boats... They're hitting 30-40 knots steady with 40-50 knots bursts, and doing triple the windspeed at times! 59f40bT51r4 windrider-carnac-by-fm-08-2008.jpg unnamed.jpg I had one of these hydrofoil trimarans, that was the first boat that was so fast I though...
by Voltron
Feb 20 2021 5:04pm
Forum: EBike Troubleshooting
Topic: Intermittent no power problem
Replies: 44
Views: 709

Re: Intermittent no power problem

That was quick 🤣
No recommendations on controllers, so so many out there these days.
by Voltron
Feb 19 2021 1:54pm
Forum: EBike Troubleshooting
Topic: Intermittent no power problem
Replies: 44
Views: 709

Re: Intermittent no power problem

Sounds like it is time.
Maybe look for one that has dual mode sensor/sensor less running too, they're nice for just this reason .
And then open up the bad one later and see if it's as simple as a loose solder joint that needs to be reflowed or something.
by Voltron
Feb 18 2021 12:18pm
Forum: EBike Troubleshooting
Topic: Intermittent no power problem
Replies: 44
Views: 709

Re: Intermittent no power problem

Here you go... Random ones from my broken bin... The more assembled one shows the clutch plate and gears, the other one shows there really isn't a board like you see in a direct drive, but rather the board is the whole circular disc, with the sensors showing around the edge where the three clusters ...
by Voltron
Feb 18 2021 12:10pm
Forum: EBike Troubleshooting
Topic: Intermittent no power problem
Replies: 44
Views: 709

Re: Intermittent no power problem

With an internally geared hub, there's usually a clutch also, so the motor doesn't spin while the power is off along with the wheel, for more bike like pedaling. That's prob why yours only sends a signal one way. Sadly, sounds like time for a new motor.. It's fixable in there depending on how far yo...
by Voltron
Feb 18 2021 7:21am
Forum: Battery Technology
Topic: What is wrong with this BMS
Replies: 6
Views: 153

Re: What is wrong with this BMS

Just a guess, but maybe that is an optional output for running a 5v port off of?
by Voltron
Feb 17 2021 12:01pm
Forum: EBike Troubleshooting
Topic: Intermittent no power problem
Replies: 44
Views: 709

Re: Intermittent no power problem

Good start👍
by Voltron
Feb 16 2021 11:00pm
Forum: EBike Troubleshooting
Topic: Intermittent no power problem
Replies: 44
Views: 709

Re: Intermittent no power problem

If you have this style Hall plug, it's easier to probe with a multimeter while it's hooked up and running. The skinny black and the red carry the 5v to the Halls. fd88dc68f1f2edb577fc3a896a285184.jpg This type plug, where the phase and Halls are built together is a lot harder to probe. s-l300.jpg Th...
by Voltron
Feb 16 2021 2:39pm
Forum: EBike Troubleshooting
Topic: Intermittent no power problem
Replies: 44
Views: 709

Re: Intermittent no power problem

Sounds like a Hall sensor problem to me. Sitting stationary the controller sounds like it's not getting startup feedback, but when you roll it, they give enough info about the magnet position that it half ass tries to run. Then whatever is shorting goes back to working normal. The fact that it goes ...
by Voltron
Feb 16 2021 10:48am
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 46
Views: 4829

Re: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor

Honestly, most sailors are going to want a folding or feathering prop, much less a 4' one 🤣

I just bought a Catalina 27 with a dead engine to do a conversion with... Electric sailboats are a pretty unbeatable pleasure machine for humans to enjoy life on.
by Voltron
Feb 13 2021 2:22pm
Forum: Motor Technology
Topic: three speed key instead of switch
Replies: 4
Views: 161

Re: three speed key instead of switch

I searched "on off on three position key switch" just as a guess and a few like that came up. I think it would replicate the normal three speed thing of common ground with 2 outs.
I had seen them called that for boat use...
by Voltron
Feb 13 2021 1:43pm
Forum: EBike Build Threads
Topic: 3000w Mongoose girder
Replies: 49
Views: 1819

Re: 3000w Mongoose girder

Mine were tight too.. At first. Lol
Then I got complacent because it hadn't been a problem so stopped checking them as much.
I've also seen boat installations with nylocks, where a corroded connection got so hot it melted the nylon right out.
Just my experience...
by Voltron
Feb 13 2021 11:08am
Forum: EBike Build Threads
Topic: 3000w Mongoose girder
Replies: 49
Views: 1819

Re: 3000w Mongoose girder

The problem I've had with the nuts and bolts approach was them getting loose from thermal expansion and contraction of the terminals. Then the resistance heat would gradually grow, then the ever looser connection finally overheated during a romping session until the bolt ends melted thru their insul...
by Voltron
Feb 12 2021 1:33pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Chinese Retro Scooter - Running at 72v versus 60v
Replies: 28
Views: 639

Re: Chinese Retro Scooter - Running at 72v versus 60v

If you're just riding it for fun, sure go for it!
If it was your only transportation, then maybe wait until you have a new controller actually in hand.
by Voltron
Feb 12 2021 10:42am
Forum: Battery Technology
Topic: Is lip04 battery safety worth it over Lithium Ion
Replies: 11
Views: 381

Re: Is lip04 battery safety worth it over Lithium Ion

On a bike, pay for the regular lithium. On something really heavy, say a maxi scooter kind of build, or a boat, or an RV storage pack, the lower density/higher weight/slower charging/lower output amp rating but high fire safety equation might work, but on a sporty bike build, I'll say from personal ...
by Voltron
Feb 11 2021 4:18pm
Forum: Motor Technology
Topic: three speed key instead of switch
Replies: 4
Views: 161

Re: three speed key instead of switch

Like this?
SWT-339-lg.jpg
SWT-339-lg.jpg (44.05 KiB) Viewed 113 times
by Voltron
Feb 11 2021 12:27pm
Forum: EBike Troubleshooting
Topic: Sondors Ebike problem
Replies: 18
Views: 689

Re: Sondors Ebike problem

Testing the throttle is easy if the controller is putting out the 5v is should to the plug. If you can't get at any exposed metal terminals while it's plugged in, you can just poke sharp pins like a sewing needle thru the wire insulation, and read off of those, then put a dab of sealing goo on when ...
by Voltron
Feb 09 2021 6:14pm
Forum: Electric Watercraft
Topic: Getting Into Electric Power Catamarans
Replies: 49
Views: 963

Re: Getting Into Electric Power Catamarans

Most of them don't seem water sealing...
by Voltron
Feb 09 2021 5:48pm
Forum: Electric Watercraft
Topic: Getting Into Electric Power Catamarans
Replies: 49
Views: 963

Re: Getting Into Electric Power Catamarans

I'm no expert, but usually I've heard pillow block associated with just mid shaft support and alignment, but not countering thrust load. Also saw thrust box mentioned as an alternative search.
I just did a quick search, and saw a few that combined the two, but nothing good yet.
by Voltron
Feb 09 2021 4:44pm
Forum: Electric Watercraft
Topic: Getting Into Electric Power Catamarans
Replies: 49
Views: 963

Re: Getting Into Electric Power Catamarans

A plus about rudders still is being able to shut off the power going downwind on a nice windy day and still steer. Also, with a nice semi balanced modern rudder the steering loads are light compared to always pivoting the motor at power, which you need a lot at low speed of course, but much easier t...
by Voltron
Feb 09 2021 4:01pm
Forum: Electric Watercraft
Topic: Getting Into Electric Power Catamarans
Replies: 49
Views: 963

Re: Getting Into Electric Power Catamarans

Not sure, but I'd wager the commercial folding one has it built into the coupler. Fyi, I've powered some beach cat type hulls, and they have a really different pitch effect compared to power cat hulls. They're built to pitch more around the middle, compared to closer to the transoms. So with the wei...
by Voltron
Feb 09 2021 3:19pm
Forum: Electric Watercraft
Topic: Getting Into Electric Power Catamarans
Replies: 49
Views: 963

Re: Getting Into Electric Power Catamarans

And surprisingly, replicating something like this in electric solves a lot of problems re. shaft alignment, appendage drag, waterproofing, and beach-abillty, hitting underwater logs etc. 56213664-long-tail-boat-motor-engine-in-tranquil-sea-in-fisherman-village-trang-thailand.jpg 560dc02979d2a1a2804c...
by Voltron
Feb 09 2021 1:38pm
Forum: Electric Watercraft
Topic: Getting Into Electric Power Catamarans
Replies: 49
Views: 963

Re: Getting Into Electric Power Catamarans

It looks like the strut is being used as a hydraulic adjustable belt tensioner.