Search found 136 matches

by trazor
Jul 14 2019 11:51pm
Forum: E-Bike Non-hub Motor Drives
Topic: OpenEMoto
Replies: 65
Views: 8938

Re: OpenEMoto

parabellum wrote:
Apr 23 2019 6:09pm
trazor wrote:
Apr 02 2019 1:16am
take some build techniques that don't require expensive tooling.
Amazing performance with such simple hand tools! Your video definitively is a source of inspiration to me. Thanks for taking time!
Thank you!

I've edited lot more hours, this time making the Emoto frame: .
by trazor
May 27 2019 11:29am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1087
Views: 82419

Re: bluetooth BMS?

Ok. Giving another shot. Have 2 batteries, 20S and 10S. Questions if i mey: How do you hook up 10S battery to 15S bms? Just skip all the remaining connections ? Can someone link me to a page with correct settings for these units? I stopped at page 15, too much for me :) I will have relay connected ...
by trazor
May 25 2019 12:48am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1087
Views: 82419

Re: bluetooth BMS?

i played around and the bluetooth apps of the smart BMS work on both of my Android mobile and tablet now. can update some parameters, but some parameters calculated from these updated parameters are incorrect, but in my opinion, this may not really affect how the charge & discharge work correctly (...
by trazor
May 20 2019 11:53pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1087
Views: 82419

Re: bluetooth BMS?

tumich wrote:
May 20 2019 4:58pm
Is it good default config for 10S version?

Image
Have you pressed the "Read" button already? Application show weird default values before reading the real config of the device.
by trazor
May 15 2019 2:44am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1087
Views: 82419

Re: bluetooth BMS?

I have installed this BMS last year. Over the winter i left my battery unattended and this BMS drained it flat. Had brand new cells that went to the bin. Had no chance to go through all the posts but is this known issue? I have 2 of them, 15S and 20S. Balancing and charging was ok but parasitic dra...
by trazor
May 09 2019 3:15am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1087
Views: 82419

Re: bluetooth BMS?

Is there a smart bluetooth BMS where i can set a maximum charging limit? I don't want to charge my batteries more than let's say 80%. JBD BMS can do what you want. You need to set a maximum voltage per pack, or per cell, and the charge mosfets will cut the charge at that voltage threshold. You need...
by trazor
May 04 2019 4:59pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3817
Views: 275395

Re: Sur-Ron - New Mid drive Bike

I hear these long rants about forks and quality and durability and dream about 10 meter jumps you are doing with you bikes. I think it is time to begin posting what we are talking about. For example, here is how I twisted my DNM forks. I can re-clamp them but after any other big hit they come back t...
by trazor
May 04 2019 2:10am
Forum: E-Bike Non-hub Motor Drives
Topic: Electric free ride build from scratch
Replies: 50
Views: 2340

Re: Electric free ride build from scratch

Hey Bonneville, Welcome! I've make my own e-motos too and all sources are free. Check some project links: https://endless-sphere.com/forums/viewtopic.php?t=92563 https://www.youtube.com/channel/UCxQhyZTLAw3pfvJFZXAff8w https://github.com/eroldan/OpenEMoto About motors, I'm very happy with the Denzel...
by trazor
Apr 29 2019 3:33am
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 148
Views: 20749

Re: New build, BHT mid-drive "direct", custom frame

just got a budget quad piston for the front only. the rear tire is already easy to lockup working great so far. i also got these 203mm rotors. thicker and heavier than shimano RT-66 that i replaced. 250g each. seems to be more powerful too, probably due to having more contact area i.e. less drilled...
by trazor
Apr 25 2019 3:16am
Forum: Battery Technology
Topic: Completed DIY E-Bike Display with a JBD BMS
Replies: 7
Views: 405

Re: Completed DIY E-Bike Display with a JBD BMS

When looking for a BMS, I wanted to find one that could display pack data and power on a screen. I was so curious to see how much power my motor drew when riding along with my cell voltages. While there are BMS's out there that can do this, they are expensive and I found the JBD smart BMS and Simat...
by trazor
Apr 24 2019 1:12am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1087
Views: 82419

Re: bluetooth BMS?

Thank you, flippy! I've found your comments and advice very useful throughout this thread, and you have basically confirmed what I suspected regarding the TC Elcon CAN charger, and regarding the Chinese BMS models discussed here. As for new cells... I originally was going to do a less powerful buil...
by trazor
Apr 17 2019 11:43am
Forum: E-Bike Non-hub Motor Drives
Topic: Kuberg Freerider Extended Swingarm Project
Replies: 153
Views: 21382

Re: Kuberg Freerider Extended Swingarm Project

They work now. Nice skid plate!. Which front fender are you using? How it works for you? Looks a bit short on the front so maybe some mud fliies to helmet/face at higher speeds. I'm on the research of the perfect fender.
by trazor
Apr 17 2019 3:06am
Forum: E-Bike Non-hub Motor Drives
Topic: Kuberg Freerider Extended Swingarm Project
Replies: 153
Views: 21382

Re: Kuberg Freerider Extended Swingarm Project

Every time I take this bike out I get the EV grin all over again...its the only bike I own that does it Running mint no issues at all, big bike im on tippy toes when I stop but I love it! It is just so fast and fun to launch and the power to weigh ratio Is superb. I am liking the eastgem wheels a l...
by trazor
Apr 04 2019 6:57pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1087
Views: 82419

Re: bluetooth BMS?

In retrospective... I'm not sure if I tested correctly the charge mosfets.
I desoldered all discharge mosfets. Two in total were short.
I desoldered all charge mosfets. All were good.

Now I've a dead BMS :roll:
by trazor
Apr 04 2019 5:18pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1087
Views: 82419

Re: bluetooth BMS?

You guys were right. I touched every mosfet on one side and one was much hotter and marked it. I took out five mosfets and tested them and the marked one was shorted. They are HY3410. Now I've another problem, I think I burnt the logic stage :( On the board I found (left from the previous operation)...
by trazor
Apr 04 2019 3:37am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1087
Views: 82419

Re: bluetooth BMS?

Hi Mates. I'm having a new kind of problem with a 20s bluetooth BMS ( https://es.aliexpress.com/item/20S-72V-or-84V-Lithium-Ion-battery-Smart-BMS-with-UART-communication-port-Li-ion-battery/32820588136.html?spm=a2g0s.9042311.0.0.274263c0EDoQXK ) The problem I noticed first is that when I put a 300W ...
by trazor
Apr 02 2019 5:38pm
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 148
Views: 20749

Re: New build, BHT mid-drive "direct", custom frame

Awesome! Even if you race alone, please use some protection (if you are low on cash buy the first items). I've purchased the cheapest stuff on amazon and I really like the products. Gloves: https://www.amazon.com/gp/product/B07B4SZBP1/ref=oh_aui_search_asin_title?ie=UTF8&psc=1 Boots: https://www.ama...
by trazor
Apr 02 2019 1:16am
Forum: E-Bike Non-hub Motor Drives
Topic: OpenEMoto
Replies: 65
Views: 8938

Re: OpenEMoto

It happens that I've been recording what I built in the last months and finally I'm editing the hundred hours to make something condensed that people can watch and maybe take some build techniques that don't require expensive tooling.

Here is #1 Swingarm
by trazor
Mar 30 2019 12:26am
Forum: E-Bike Non-hub Motor Drives
Topic: OpenEMoto
Replies: 65
Views: 8938

Re: OpenEMoto

IMG_20190128_174433.jpg Testing automotive paint. Silicone plugs in place. I'm fed up of rust. Powder coating is the way to go. I got great results from a home powder coat kit I got from Eastwood Company. I think you are right because after painting one of my moto with 3 layer automotive paint and ...
by trazor
Mar 24 2019 11:09pm
Forum: E-Bike Non-hub Motor Drives
Topic: OpenEMoto
Replies: 65
Views: 8938

Re: OpenEMoto

IMG_20190322_001749.jpg
I've made "quick release" headlamp mounts for my two fork models (Marzocchi 380 2016 and DNM-USD8). https://github.com/eroldan/OpenEMoto/tr ... r/Headlamp

Check the BOM for details. https://github.com/eroldan/OpenEMoto/bl ... mp/BOM.txt
by trazor
Mar 08 2019 10:15pm
Forum: E-Bike Build Threads / Photos & Video
Topic: WORLDS BEST DIY E-MINI MOTO DIRT BIKE!!!
Replies: 2
Views: 530

Re: WORLDS BEST DIY E-MINI MOTO DIRT BIKE!!!

:lol: :lol: :lol: :lol: The title says it all.
Indeed it looks silly, but it probably give you lot of fun building and riding it.
Those footpegs from electric unicycle are so out of place :lol:
Nice build taking into acount the sourced parts. :bigthumb:
by trazor
Mar 03 2019 1:39am
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 148
Views: 20749

Re: New build, BHT mid-drive "direct", custom frame

Qgx0rt-1LCw i should not have procrastinated w/ the sensor install. i would've seen that the yellow phase wire was rubbing against the rotor. eventually the insulation and copper wire wore off and started acting like brushes, hence the scorch marks quality on this BHT motor is really crap :lol: Bum...
by trazor
Feb 25 2019 1:49am
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 148
Views: 20749

Re: New build, BHT mid-drive "direct", custom frame

https://i.imgur.com/8uJow6E.jpg https://i.imgur.com/5oL4JRm.jpg will do the shunt mod ASAP and also the temp probe on the windings. if power is still inadequate and there's still some thermal headroom i'll probably get the kelly controller speaking of thermal headroom. what's the safe max temp of t...
by trazor
Feb 24 2019 12:21am
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 148
Views: 20749

Re: New build, BHT mid-drive "direct", custom frame

Are you monitoring temps inside the motor? By the time the heat soaks through to the case it could be way too late for the windings. Great job on the bike build by the way! I agree with that. I've fixed the temperature sensor (the same as the picture, with the remote display) inside the motor, on t...
by trazor
Feb 22 2019 12:58am
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 148
Views: 20749

Re: New build, BHT mid-drive "direct", custom frame

https://i.imgur.com/vyME3vg.jpg haha i was looking at the same thing! but blue https://i.imgur.com/O6fWxf6.jpg i actually don't mind bending those cheapo pedals. but they might deform the frame during a crash. so yes i'll be switching to pegs soon. will add a bolt-on mounting plate here also the 17...