Search found 113 matches

by owhite
Apr 04 2021 7:33am
Forum: EBike Technical
Topic: building the BESC - 100V, 400A motor controller
Replies: 97
Views: 6454

Re: building the BESC - 100V, 400A motor controller

Thanks. I've tried a few things but so far I've only gotten about 40 amps max. I'm still getting 50 mph which is good but would to like to know why I cant achieve more. Hopefully Galp will make an appearance with some suggestions. Also, I'm beginning to suspect the quality of my batteries so I order...
by owhite
Apr 01 2021 8:25pm
Forum: EBike Build Threads
Topic: 5kW ebike motor / controller testing
Replies: 24
Views: 2745

Re: 5kW ebike motor / controller testing

Now with the battery box closed up:
Image

Some specs -- these are mostly based on getting readings off of the BESC controller
Amps: 80
Batteries: 24s
MPH: 51
Weight inventory:
Image
by owhite
Mar 29 2021 7:09pm
Forum: EBike Technical
Topic: building the BESC - 100V, 400A motor controller
Replies: 97
Views: 6454

Re: building the BESC - 100V, 400A motor controller

24S should be okay but I wouldn't go much higher. Hey Galp. I'm at 24s and I'm trying to push more amps into my QS205 motor. I am using an ADC throttle, setting motor current max to 200, and battery current max to 120. I am using the SolidGeek/VescUart to read average input current. When I take the...
by owhite
Mar 18 2021 8:25pm
Forum: EBike Build Threads
Topic: 5kW ebike motor / controller testing
Replies: 24
Views: 2745

Re: 5kW ebike motor / controller testing

Image

it's coming along. still doing a lot of work on the controller.
by owhite
Mar 18 2021 4:02am
Forum: EBike Build Threads
Topic: Mongoose Blackcomb
Replies: 63
Views: 3155

Re: Mongoose Blackcomb

It's a nice layout! How much clearance do you have between the mid-motor and the dropouts in the back? What size tire are you planning for the rear? Also, are there any bearings going in where you are putting in your shock plate linkages or is it just surface to surface with bolts?
by owhite
Mar 17 2021 6:22pm
Forum: EBike Build Threads
Topic: Mongoose Blackcomb
Replies: 63
Views: 3155

Re: Mongoose Blackcomb

I really like the single pivot soft tails. Do you have drawing for where you plan on putting your battery?
by owhite
Mar 16 2021 1:07pm
Forum: EBike Technical
Topic: building the BESC - 100V, 400A motor controller
Replies: 97
Views: 6454

Re: building the BESC - 100V, 400A motor controller

thanks. Yes I agree hardcoding everything is not going to be ideal. Part of this started with a problem at the cable connector when it got over extended and it looked like some pins broke off from the board. I de-soldered the connector and then soldered in wires from a USB cable directly into the PC...
by owhite
Mar 10 2021 3:12pm
Forum: Bike Mechanical & Structural
Topic: Supplies for frame building
Replies: 4
Views: 582

Re: Supplies for frame building

did you do the welding? What type? I have, let's call it agricultural quality, skill at MIG (works just fine if your tractor needs repair) but absolutely failed at TIG welding aluminum. Sure wish I could learn.
by owhite
Mar 07 2021 5:23pm
Forum: EBike Build Threads
Topic: 5kW ebike motor / controller testing
Replies: 24
Views: 2745

Re: 5kW ebike motor / controller testing

Yah the tire in that last video is simply too large.

Purchased a 19x inch rim (36mm, inner width).

https://www.treatland.tv/semi-gloss-sat ... ch-rim.htm

Working on the calculation for a new wheel:
Image
by owhite
Mar 06 2021 9:18pm
Forum: EBike Technical
Topic: building the BESC - 100V, 400A motor controller
Replies: 97
Views: 6454

Re: building the BESC - 100V, 400A motor controller

Galp, one of my BESC G2 controllers appears to be working just fine except the USB connection is not working. I dont know if I fried the USB_DM/USB_DP pins on the STM32F405, or the USBLC6 diode clamp, but for some reason it just wont establish serial communication to my computer. Do you know if ther...
by owhite
Feb 24 2021 6:30pm
Forum: EBike Build Threads
Topic: 5kW ebike motor / controller testing
Replies: 24
Views: 2745

Re: 5kW ebike motor / controller testing

Starting to get the bike to run:
https://youtu.be/VCvrm-DAZ54

That's a motorcycle tire on the hubmotor -- which I dont think is a good idea but gonna go with it now because it is roughly the same diameter of the front 26 wheel.
by owhite
Feb 18 2021 10:08am
Forum: EBike Technical
Topic: building the BESC - 100V, 400A motor controller
Replies: 97
Views: 6454

Re: building the BESC - 100V, 400A motor controller

and I edited the entry about my build to be more clear that U7 should be removed.
by owhite
Feb 13 2021 8:16pm
Forum: EBike Build Threads
Topic: 5kW ebike motor / controller testing
Replies: 24
Views: 2745

Re: 5kW ebike motor / controller testing

Additional work on the interior of the battery box. I designed and 3D printed holders: https://i.imgur.com/PYX4Ahp.png A pic of the back holder: https://i.imgur.com/yrQoyWB.jpg The holders in the battery box, with batteries: https://i.imgur.com/mjee5rY.jpg Velcro straps will be used to keep the boxe...
by owhite
Feb 06 2021 10:55am
Forum: EBike Technical
Topic: building the BESC - 100V, 400A motor controller
Replies: 97
Views: 6454

Re: building the BESC - 100V, 400A motor controller

would you have any interest in posting an overall diagram and your stm32 code?
by owhite
Feb 02 2021 2:05pm
Forum: EBike Technical
Topic: building the BESC - 100V, 400A motor controller
Replies: 97
Views: 6454

Re: building the BESC - 100V, 400A motor controller

andress.cz wrote: I flashed the binary on galp's website using st link utility and everything went good except the other two LEDs did not light up even after rebooting. andress -- what was the operating system you used to load the firmware? I had a similar problem when I used macOS. See this post: h...
by owhite
Feb 02 2021 12:58pm
Forum: EBike Technical
Topic: building the BESC - 100V, 400A motor controller
Replies: 97
Views: 6454

Re: building the BESC - 100V, 400A motor controller

Hey! I compiled latest vesc code for BESC-G2 and tested it with hall sensors. Download it from the link bellow. You can also find updated HW config files for vesc code in the attachment. Thanks Galp! I'll try it very soon. The board is working very well so far! My board is mounted, has been spinnin...
by owhite
Jan 30 2021 6:24pm
Forum: EBike General Discussion
Topic: gap between swing arm and disc brake -- suggestions?
Replies: 26
Views: 940

Re: gap between swing arm and disc brake -- suggestions?

So came up with a fix for now. After the stock adaptor that comes with the caliper is attached, turns out I needed to make up about for about 5mm to align the caliper over the disc. But when you take into account my oversized swingarm an additional10mm is needed. Fortunately when i made swingarms I ...
by owhite
Jan 25 2021 9:11am
Forum: EBike General Discussion
Topic: gap between swing arm and disc brake -- suggestions?
Replies: 26
Views: 940

Re: gap between swing arm and disc brake -- suggestions?

Thanks. I've ordered the brakes and calipers so I can work out a better design. I'm considering cutting new plates using waterjet on to be welded on to the in-side of the swing arm. That will help close the gap on the unnecessarily oversized drop out width. The plate on the wire side could handle th...
by owhite
Jan 24 2021 7:33pm
Forum: EBike General Discussion
Topic: gap between swing arm and disc brake -- suggestions?
Replies: 26
Views: 940

Re: gap between swing arm and disc brake -- suggestions?

Thanks MadRhino - this is very helpful. I'm going to keep working with my current swingarm but I'm sure at some point I'll make a different version. I'll use 154mm when I do. In the meantime I ordered some spacers to mount on the hub as you suggested.
by owhite
Jan 24 2021 6:13am
Forum: EBike General Discussion
Topic: gap between swing arm and disc brake -- suggestions?
Replies: 26
Views: 940

Re: gap between swing arm and disc brake -- suggestions?

Useless discussion. The OP just wanted to be comforted with his own truth and won’t change his mind anyway. He probably been told that he needed a 154 mm swing arm before making one 190 mm MadRhino, that's not really what is happening. I definitely should have been smarter picking the dropout width...
by owhite
Jan 23 2021 6:46pm
Forum: EBike Build Threads
Topic: 5kW ebike motor / controller testing
Replies: 24
Views: 2745

Re: 5kW ebike motor / controller testing

an interesting discussion about the gap between my swingarm and the disc brake

viewtopic.php?f=3&t=110116&p=1613438#p1613438
by owhite
Jan 23 2021 1:29pm
Forum: EBike General Discussion
Topic: gap between swing arm and disc brake -- suggestions?
Replies: 26
Views: 940

Re: gap between swing arm and disc brake -- suggestions?

So I appreciate the engineering discussion. Another consideration is relevant here: https://i.imgur.com/Scg6kY9.jpg While I'd like to make a 25mm extension off of the hub, to me it looks like it would start to rub the phase wires coming out of the hub casing. That looks more like I could get 5-10mm ...
by owhite
Jan 22 2021 5:41pm
Forum: EBike General Discussion
Topic: gap between swing arm and disc brake -- suggestions?
Replies: 26
Views: 940

Re: gap between swing arm and disc brake -- suggestions?

I do see your point about torque, but from a physics perspective, isnt there more torque placed on the just two bolts, that are ~180mm from the center of the axle, as compared to six bolts that are closer? the bolts off the hub are M5s. you make a good point which is if the hub bolts get shredded, r...
by owhite
Jan 22 2021 1:00pm
Forum: EBike General Discussion
Topic: gap between swing arm and disc brake -- suggestions?
Replies: 26
Views: 940

gap between swing arm and disc brake -- suggestions?

I made a custom swing arm with a 190 dropout distance for a QS205 motor. Swing arm construction described here: https://endless-sphere.com/forums/viewtopic.php?f=6&t=108357&p=1612317#p1595747 Next time i'll design the distance differently. https://i.imgur.com/nEJtZwR.png so I have a gap of 3...
by owhite
Jan 20 2021 9:03am
Forum: EBike Technical
Topic: building the BESC - 100V, 400A motor controller
Replies: 97
Views: 6454

Re: building the BESC - 100V, 400A motor controller

Yes: https://www.mouser.com/datasheet/2/445/ ... 723496.pdf :D
I might have to expand the size of the board but I think it would be worth it.