Search found 13491 matches

by fechter
Jun 17 2019 2:01pm
Forum: E-Bike Technical
Topic: LCD display problem
Replies: 2
Views: 43

Re: LCD display problem

It's highly unlikely you can get just the display. You would probably have to get a whole new controller with a display. Since you took it apart and the insides are dried out, it might start working again. Next time anything electronic gets wet, disconnect the battery as soon as possible and let thi...
by fechter
Jun 17 2019 1:55pm
Forum: E-vents
Topic: Lost Sierra Races 2019, July 12-14
Replies: 18
Views: 812

Re: Lost Sierra Races 2019, July 12-14

devo1223 wrote:
Jun 17 2019 11:54am
3559 Beckwourth Calpine Rd, Beckwourth, CA 96129
OK, thanks for posting that. On Google street view, it looks like out in the middle of nowhere. Could become the next Burning Man.

Burning Bike?
by fechter
Jun 17 2019 1:49pm
Forum: E-Bike Non-hub Motor Drives
Topic: Definite guide to suppress BB creacking noise with mid drive kits
Replies: 3
Views: 167

Re: Definite guide to suppress BB creacking noise with mid drive kits

Another option would be to pull the drive out and drill and tap some holes in the bottom bracket and install set screws. Tighten the set screws after reinstalling the drive. Loctite on everything.
by fechter
Jun 17 2019 10:20am
Forum: E-Bike Non-hub Motor Drives
Topic: BBS01B 36V 250W - trying with higher voltage [success]
Replies: 54
Views: 4747

Re: BBS01B 36V 250W - trying with higher voltage [success]

Thank you Wizzeros for the info. I tried to keep it simple. I moved the brown wire and TVS Diode outside the cable to keep it away from the other wires due to possible heat concerns. I then covered the diode with heat shrink wire wrap. I ran this setup for about 15 minutes with no detectable heat p...
by fechter
Jun 15 2019 10:08am
Forum: General Discussion
Topic: la Nina rears her ugly head
Replies: 1342
Views: 61049

Re: la Nina rears her ugly head

Back to "normal" weather here for at least the next week. Now I have to do a bunch of yard work that I put off during the heat wave.
by fechter
Jun 15 2019 10:05am
Forum: E-Bike Non-hub Motor Drives
Topic: BBSHD Voltage Problem Firmware Update & Instructions
Replies: 69
Views: 2936

Re: BBSHD Voltage Problem Firmware Update & Instructions

Or maybe try to ask bafang support for the correct firmware while explaining your situation. Luna cycle, arguably their largest single customer has been trying to do this for a long time without success. It's like Bafang doesn't even know or doesn't care. There is no way to read the firmware from t...
by fechter
Jun 14 2019 3:59pm
Forum: E-vents
Topic: Lost Sierra Races 2019, July 12-14
Replies: 18
Views: 812

Re: Lost Sierra Races 2019, July 12-14

So exactly where is this event going to be? From what I could read, it's in Beckwourth, CA, but not really sure.
by fechter
Jun 14 2019 3:50pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 340
Views: 14450

Re: APL's DIY axial-flux motor

I think a single cut will be fine. There isn't much stress on that area. Most of the force is sideways. Epoxy in the cut is a good idea.
by fechter
Jun 14 2019 12:43pm
Forum: Items Wanted
Topic: Meanwell S-350-24 or 48 volt DC power supply
Replies: 5
Views: 413

Re: Meanwell S-350-24 or 48 volt DC power supply

The Meanwell HLG series is made to run continuously at the current limit and it's adjustable, so should be a winner. They also have a great track record. The first one can most likely be made for adjustable current, but the circuit layout is probably unique and would need to be traced out to find wh...
by fechter
Jun 14 2019 12:36pm
Forum: Battery Technology
Topic: Build a mini USV/UPS
Replies: 32
Views: 470

Re: Build a mini USV/UPS

These little boards claims 4A output. Sure this is chinese amps, and it will not work converting 5V to 30V@4A, as it's the input current AND the output current that count. But if you say your working battery range is from 9V to 12V and your output is 2A@12V you should be fine. You can then decide i...
by fechter
Jun 14 2019 10:48am
Forum: Battery Technology
Topic: Build a mini USV/UPS
Replies: 32
Views: 470

Re: Build a mini USV/UPS

I was looking at doing the same thing here. One problem is the voltage range of the batteries may be outside the acceptable range for the loads. One solution for this would be using a small dc-dc converter to output a regulated 12v or 5v. Then you could use a 4s pack and charge it to whatever level ...
by fechter
Jun 14 2019 10:28am
Forum: General Discussion
Topic: Faulty Battery or Charger or both ?
Replies: 3
Views: 61

Re: Faulty Battery or Charger or both ?

42v would be correct for a 36v (10s) battery. If the charger can run the motor, it sounds good (at least the 36v one) Many chargers have a safety feature that will prevent output until it "sees" battery voltage. You could try measuring the voltage across the charge connector on the pack. If the cont...
by fechter
Jun 14 2019 10:24am
Forum: Motor Technology
Topic: Securing Hall Sensors
Replies: 2
Views: 66

Re: Securing Hall Sensors

It would be bad if the sensors moved and made contact with the rotor. Most motors use epoxy to hold them. High temp epoxy would be the best.
by fechter
Jun 14 2019 10:14am
Forum: E-Bike Non-hub Motor Drives
Topic: BBSHD Voltage Problem Firmware Update & Instructions
Replies: 69
Views: 2936

Re: BBSHD Voltage Problem Firmware Update & Instructions

If one was so inclined: first, convert the bin files to hex. It is likely the constant for the max current is declared as an 8 bit int (byte), so you would change one or more of the occurrences of 0x1C to 0x1E. The problem is it could take quite a crazy amount of time to figure out which bytes to c...
by fechter
Jun 13 2019 11:58pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 340
Views: 14450

Re: APL's DIY axial-flux motor

Maybe cut diagonally from the corner of the hole. The set screw will still hold the coil.
by fechter
Jun 13 2019 12:07am
Forum: E-Bike Non-hub Motor Drives
Topic: BBSHD Voltage Problem Firmware Update & Instructions
Replies: 69
Views: 2936

Re: BBSHD Voltage Problem Firmware Update & Instructions

It may be possible to compare the two firmware files and look for the differences and figure out a way to edit it to make a "5230" version.
by fechter
Jun 12 2019 8:02am
Forum: Items for Sale - New
Topic: Sur-Ron - Belt upgrade KIT
Replies: 58
Views: 3579

Re: Sur-Ron - Belt upgrade KIT

Here is a good guide on belt alignment: https://ww2.gates.com/IF/facts/documents/Gf000275.pdf You can easily adjust the angular alignment of the rear using the chain adjusters. You need to use a good straight edge across the rear sprocket that is long enough to reach the front to get a good measurem...
by fechter
Jun 11 2019 5:18pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3677
Views: 254556

Re: Sur-Ron - New Mid drive Bike

Toward the bottom on page 1 of this topic. Overall ratio is 7.6.
by fechter
Jun 11 2019 8:04am
Forum: Items for Sale - New
Topic: JP spot welder
Replies: 1223
Views: 159320

Re: JP spot welder

This is very close to how I plan to build my first battery, the way you've laid out the nickel strips and how things flow through the battery - Can you tell me what materials and what method you used for the big main negative and main positive bus bars at each end? looks like more than just nickel ...
by fechter
Jun 10 2019 7:49pm
Forum: General Discussion
Topic: la Nina rears her ugly head
Replies: 1342
Views: 61049

Re: la Nina rears her ugly head

Official high in San Francisco was 97 today, breaking the record for the day. Normal high for today is 66. 102 at my house.
by fechter
Jun 10 2019 7:13pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 340
Views: 14450

Re: APL's DIY axial-flux motor

100 rpm should work but faster is better. Whatever is easy to do.
by fechter
Jun 10 2019 3:54pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3677
Views: 254556

Re: Sur-Ron - New Mid drive Bike

i saw this. and it is very nice. perfect for street riding/commuting. but offroad on step terrain(downhill) my ass moves and hits the rear fender. i dont know if the cases on both sides allow those movements. also when a narrow trial ends unexpected(too big trees or simply not rideable) the common ...
by fechter
Jun 10 2019 3:46pm
Forum: E-Bike Non-hub Motor Drives
Topic: BBS01B 36V 250W - trying with higher voltage [success]
Replies: 54
Views: 4747

Re: BBS01B 36V 250W - trying with higher voltage [success]

Thanks for the quick reply. I would rather use the display extension cable method as you recommended. However, I need help in determining what TVS diode to use. I need to drop my 36v battery's max charge of 50.4v down to my HVC 44.1v. Any suggestions? Thanks. Pretty much any of these should work: h...
by fechter
Jun 10 2019 3:12pm
Forum: General Discussion
Topic: la Nina rears her ugly head
Replies: 1342
Views: 61049

Re: la Nina rears her ugly head

Having an early season heat wave here. 86F in San Francisco. That's not really hot by most peoples' standards, but most buildings don't have air conditioning here. About 95F at my house yesterday. I went for a ride mid afternoon up in the hills. Saw a total of 4 people, which is much fewer than a ty...