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by dogman dan
Apr 07 2020 7:16am
Forum: E-Bike General Discussion
Topic: Any suggestions on this
Replies: 9
Views: 169

Re: Any suggestions on this

Ok, definitely brushless, so less likely the motor cooked off. Again, often just the connectors to the motor. Sounds like either a bad contact on one of the 8 wires to the motor, or a hall sensor in the motor failed. Not so likely the controller, blown controllers typically result in nothing happens...
by dogman dan
Apr 07 2020 7:10am
Forum: E-Bike General Discussion
Topic: a speed electric bike, looking something with a big battery
Replies: 13
Views: 196

Re: a speed electric bike, looking something with a big battery

Well, at 40 kph/ 25 mph, your watt hours per mile will be around 30. Better than at 30 mph, but still a lot. A 700 wh battery will then take you, on a good warm day with no wind, 22 miles /35 km , not including any huge, one way hills. Rolling hills ok. where does this come from? 5 years of commutin...
by dogman dan
Apr 07 2020 6:53am
Forum: E-Bike General Discussion
Topic: Kona UTE Cargo Ebike
Replies: 13
Views: 301

Re: Kona UTE Cargo Ebike

Brakes are part of why I suggested a mid drive. Then he does not need a smaller rear wheel. If he does a single rear hub motor, just make it a bigger motor, with 26" wheel then he can keep his brakes. If he goes to 20" wheel in the back of that frame, he will change the height too much, and pedal dr...
by dogman dan
Apr 07 2020 6:45am
Forum: Battery Technology
Topic: Cheap high capacity battery
Replies: 15
Views: 248

Re: Cheap high capacity battery

12 ah 18650 cells. We all want em, but they don't exist.
by dogman dan
Apr 07 2020 6:40am
Forum: General Discussion
Topic: Torquing the pedals on -- what special tool is needed?
Replies: 28
Views: 302

Re: Torquing the pedals on -- what special tool is needed?

Just get a good park tools or similar long handle pedal wrench, and crank on it like they said. If you want serious torque, then secure the wheel like they said, and tap the handle with a hammer. Others have had issues that related partly to their weight, but also sometimes because they got a loose ...
by dogman dan
Apr 06 2020 7:39am
Forum: E-Bike General Discussion
Topic: Hall sensor confusion
Replies: 31
Views: 345

Re: Hall sensor confusion

Well, theres the problem, I am a dummy who can't even understand half what AW says. And then I explain it for dummies, but poorly since I am a dummy. Yes, Dmm goes on the red, and the green or blue or yellow. I thought he meant he put the battery + on the g y or b. Battery goes on the halls red and ...
by dogman dan
Apr 06 2020 7:18am
Forum: E-Bike General Discussion
Topic: a speed electric bike, looking something with a big battery
Replies: 13
Views: 196

Re: a speed electric bike, looking something with a big battery

About the only easy way would be to pick a bike you really like, then buy 2 spare batteries for it, giving you about 1500 wh. When the first battery empties, swap out. At that speed though, 1500 wh won't take you anywhere near 60 miles. At 28 mph, you will use about 35-40 watt hours per mile. What y...
by dogman dan
Apr 05 2020 6:32am
Forum: E-Bike General Discussion
Topic: Hall sensor confusion
Replies: 31
Views: 345

Re: Hall sensor confusion

Hall, might work backwards, but pretty sure its red + black -, and the colored wires are sending power back to controller. But looks to me like that green hall sensor works. So replacing it won't change your problems. Next look for if the controller actually powers up the halls, on the red and black...
by dogman dan
Apr 05 2020 6:24am
Forum: E-Bike General Discussion
Topic: Kona UTE Cargo Ebike
Replies: 13
Views: 301

Re: Kona UTE Cargo Ebike

Lovely bike for $300! way to go. But for your intended use, the best bet would be a mid drive. If you go with a very large DD motor, and 72v, then you'd have so much power it would run fine in 26" wheel though, and haul a trailer if you wish. Personally, I'd try a 36v mid drive first. Your needs sho...
by dogman dan
Apr 05 2020 6:18am
Forum: E-Bike General Discussion
Topic: Any suggestions on this
Replies: 9
Views: 169

Re: Any suggestions on this

First of all, is this a brushed motor or a brushless?

Second of all, 90% of non battery related problems are related to bad connections. So check em all again, and again. The typical problem tends to be the contacts back out of the housing as you plug them in, so they look good, but are not.
by dogman dan
Apr 05 2020 6:14am
Forum: Battery Technology
Topic: Did i destroy my LiPos?
Replies: 13
Views: 221

Re: Did i destroy my LiPos?

Do try not to discharge so deep anymore. 3v is very bad, but not quite ruined in one ride. Stop at 3.65v per cell ideally. This reduces stress on the cells, vs discharging to 3.5v. You can get warning buzzers to put on the packs, or at least one of them, to help keep from doing it again. Don't leave...
by dogman dan
Apr 05 2020 6:07am
Forum: Battery Technology
Topic: Watt hour for lippo and lithium-ion
Replies: 6
Views: 116

Re: Watt hour for lippo and lithium-ion

Theoretically, an amp hour is an amp hour. But vendors sell based on theoretical capacity, not real world watt meter tested capacity. And alas, sometimes vendors just plain lie, but that is easy to tell just by price. If you are buying a 48v 20 ah battery for 200 bucks, they are lying. But back to r...
by dogman dan
Apr 04 2020 6:04am
Forum: E-Bike Technical
Topic: Help troubleshooting electric mini bike that intermittently blows fuses
Replies: 19
Views: 207

Re: Help troubleshooting electric mini bike that intermittently blows fuses

To clarify, what I meant was a 36v controller, with higher amps. Not a higher voltage controller. It could be that like the bike I had, your controller just could not handle the load the motor is trying to pull, because of the load, and how it is geared. If the bike is geared too high, then the moto...
by dogman dan
Apr 04 2020 5:49am
Forum: E-Bike Technical
Topic: throttle not connect to the brushless controller
Replies: 3
Views: 67

Re: throttle not connect to the brushless controller

I am assuming you did this, but after you connect the self study/ self learn wires and power up, you then disconnect that plug to run the bike. It is unplugged in one picture. The other obvious problem, would be a bad contact on the wires to the throttle. Positive you connected the throttle to the r...
by dogman dan
Apr 04 2020 5:46am
Forum: E-Bike General Discussion
Topic: Changing switch brake levers to magnetic hydraulic sensors
Replies: 7
Views: 136

Re: Changing switch brake levers to magnetic hydraulic sensors

One reason I loath cheap PAS. Temporarily, unplug the wires to the pas sensor.
by dogman dan
Apr 04 2020 5:42am
Forum: E-Bike General Discussion
Topic: Converting a beach cruiser with front wheel motor.
Replies: 24
Views: 256

Re: Converting a beach cruiser with front wheel motor.

https://www.walmart.com/ip/Mx-Brake-Rear-Alloy-Chrome-for-bicycle-brake-bike-brake-bmx/101033336?wmlspartner=wmtlabs&adid=22222222222108848339&wmlspartner=wmtlabs&wl0=e&wl1=o&wl2=c&wl3=75110452366963&wl4=pla-4578710021773988&wl5=&wl6=&wl7=&%20wl10=Walmart&wl12=101033336_10000004105& If you can find ...
by dogman dan
Apr 04 2020 5:38am
Forum: E-Bike General Discussion
Topic: Hall sensor confusion
Replies: 31
Views: 345

Re: Hall sensor confusion

Continuity testing the wires to the halls would confirm they still work to connect to the actual halls. I assumed you were testing like this, 4v battery cell connected to red and black, then see if voltage toggles on and off on voltmeter connected to black, and either blue, green, or yellow wire. Yo...
by dogman dan
Apr 04 2020 5:33am
Forum: E-Bike General Discussion
Topic: 48v 50a bms or 52v 30a bms
Replies: 3
Views: 80

Re: 48v 50a bms or 52v 30a bms

Try to figure out which one has the best cells. If they are better in the 50 amp bms pack, choose that one. If the same, I'd always like more voltage, for higher speeds at the end of the ride, when voltage gets so low.
by dogman dan
Apr 04 2020 5:29am
Forum: Battery Technology
Topic: What would happen in this scenario?
Replies: 10
Views: 229

Re: What would happen in this scenario?

Just snip one shunt, or leave it intact and unsolder one end. Then you have a wimpy 25 amps controller to go with your wimpy 30 amps battery. If they say 30 amps, it will be happiest with 15 amps continuous anyway. Likely that's about 25 mph tops. Not exactly real fun, but just saying, if you want t...
by dogman dan
Apr 03 2020 6:37am
Forum: E-Bike Technical
Topic: Help troubleshooting electric mini bike that intermittently blows fuses
Replies: 19
Views: 207

Re: Help troubleshooting electric mini bike that intermittently blows fuses

Sounds to me like the controllers can't do the load. The fuse is blowing when the caps go. Bigger controllers, so you can melt the motor. It may not be so much that the controllers are too weak, as the controllers are just not performing to spec, since they are cheapos. A bigger controller may handl...
by dogman dan
Apr 03 2020 6:30am
Forum: E-Bike General Discussion
Topic: Converting a beach cruiser with front wheel motor.
Replies: 24
Views: 256

Re: Converting a beach cruiser with front wheel motor.

One way to improve brakes easy, is just swap the fork on the cruiser. Anything will work, so long as it has the right headset size, wheel size, and headset length, and rim or disc brake mounts. And btw, that motor likely has a disc mount too. Welding a simple steel plate to a cruiser fork is quite e...
by dogman dan
Apr 03 2020 6:24am
Forum: E-Bike General Discussion
Topic: Hall sensor confusion
Replies: 31
Views: 345

Re: Hall sensor confusion

So when you test the halls,, you made connections to them inside the motor, and they still did not work? Just saying, as you take it apart to put in the new halls, check em again before you rip them out of the motor. You will be cutting the wires to do this anyway, but if they are good, you can stil...
by dogman dan
Apr 03 2020 6:20am
Forum: E-Bike General Discussion
Topic: Changing switch brake levers to magnetic hydraulic sensors
Replies: 7
Views: 136

Re: Changing switch brake levers to magnetic hydraulic sensors

FWIW, we needed cut off switches on brake levers when bikes ran on brushed motors. Brushed controllers had a way of failing that resulted in full throttle to the motor. Brushless, I suppose its possible to fail this way, but I never had it happen, nor heard of it. You could have a pair of wires to t...
by dogman dan
Apr 03 2020 6:10am
Forum: Battery Technology
Topic: What would happen in this scenario?
Replies: 10
Views: 229

Re: What would happen in this scenario?

Isn't 60v pretty close to 18s? I would not worry a lot about the controller. The cells will tell you when you hit them with too much amps. If sag is only 4v, then the system is still only drawing amps the cells can handle. If it sags 10v, you are killing them. What I mean is that you only draw that ...
by dogman dan
Apr 03 2020 6:04am
Forum: General Discussion
Topic: haircut
Replies: 25
Views: 719

Re: haircut

Actually, if your state has closed the barber shops as non essential, then having him come to your house is defeating social distancing. Just saying, think about how essential a haircut really is. Of course, this from a guy who last saw a barber in about 1980,, Still have the ponytail, but its quite...