Search found 506 matches

by pwd
Jul 23 2021 9:40am
Forum: Bike Mechanical & Structural
Topic: In frame battery housings, suggestions please
Replies: 9
Views: 295

Re: In frame battery housings, suggestions please

My enclosure / housing is 20ga steel with some but minimal intrusion:
IMG_20200604_095707 (1).jpg
IMG_20200604_095707 (1).jpg (389.12 KiB) Viewed 11 times
IMG_20200513_195746 (2).jpg
IMG_20200513_195746 (2).jpg (477.23 KiB) Viewed 11 times
I welded some long nuts to the bottom of the housing to fasten to the bike frame with some shaft collars. It works great on my round tube frame.
by pwd
Jul 21 2021 8:45am
Forum: EBike Troubleshooting
Topic: MXUS XF19C Issue
Replies: 11
Views: 305

Re: MXUS XF19C Issue

My two estimates on removing the freehub based on your photos are:

remove the c-clip and pull the freehub off (toward the end of the axle) by hand

or

remove the side plate with the freehub, remove the Philips head screws and push the freehub inward to separate it
by pwd
Jul 16 2021 12:39pm
Forum: EBike Troubleshooting
Topic: MXUS XF19C Issue
Replies: 11
Views: 305

Re: MXUS XF19C Issue

Post some photos of it. I'm sure someone will know how to figure it out.
by pwd
Jul 16 2021 12:33pm
Forum: EBike General Discussion
Topic: What controller for more amps?
Replies: 10
Views: 240

Re: What controller for more amps?

It's hard to say without knowing some of the specifics of the motor such as: magnet height, rpm/volt and diameter. We can generalize and say many motors with a "1500W" rating will probably be around 25-35mm magnet height and the common 205mm diameter. If the motor fits that category; it ca...
by pwd
Jul 15 2021 10:32am
Forum: EBike General Discussion
Topic: 9c clone DD, How much power to make it hit like a BBSHD
Replies: 1
Views: 100

Re: 9c clone DD, How much power to make it hit like a BBSHD

FYI, the Grin motor sim does have a mid-drive and BBSHD option to help do your calculation/comparison. Once you've setup the params of the BBSHD, just keep increasing the phase and battery current on the dd hub controller to get the thrust (torque) results you want. A smaller wheel size for the hub ...
by pwd
Jul 12 2021 5:21pm
Forum: Battery Technology
Topic: How to charge bike battery to only 80% ?
Replies: 31
Views: 686

Re: How to charge bike battery to only 80% ?

Most of the common chargers can be adjusted (with a screwdriver) via a trim potentiometer inside:
https://www.youtube.com/watch?v=ViORzKrOfHU
by pwd
Jul 11 2021 2:41pm
Forum: EBike Non-hub Motor Drives
Topic: new cyclone 3000 w mid-drive kit?
Replies: 3520
Views: 472028

Re: new cyclone 3000 w mid-drive kit?

I'm new and still learning all the specifics, but would this work? I know they're cheap knock off crap at best. But would two of them make a useable 72v 20ah battery. I'm not worried about them lasting long, I'll lget the warranty coverage plan so when they fail i can get them replaced or my money ...
by pwd
Jul 09 2021 1:50pm
Forum: EBike Non-hub Motor Drives
Topic: TSDZ2 Controller: over-volting tolerance?
Replies: 7
Views: 226

Re: TSDZ2 Controller: over-volting tolerance?

.... The most easy solution from Manbeer is indeed to use a 48V charger for your 52V battery. In that case you always are sure the battery is charged with the right Voltage. My gripe with that is that some BMSs will not balance charge at that low of voltage (3.9V per cell or 14S @ 54.6V). Most do i...
by pwd
Jul 09 2021 8:21am
Forum: EBike Build Threads
Topic: PWD's Rocky Mountain Element - 2WD
Replies: 64
Views: 9538

Re: PWD's Rocky Mountain Element - 2WD

The rear Big Ben Plus tire was looking pretty worn and I really wanted to try something a bit wider. I strongly considered motorcycle/moped tires but didn't want to go down that route. I was hoping I could have found a moto tire that fits a 24inch bike rim but 20 inch motorcycles are few and far bet...
by pwd
Jul 08 2021 7:15pm
Forum: EV Business World
Topic: real car companies are finally coming for Tesla
Replies: 28
Views: 608

Re: real car companies are finally coming for Tesla

I'm excited to see what Toyota does when they enter the full EV arena. They are simply waiting for better battery (or other) tech and then they will swoop in when it makes financial sense to.
by pwd
Jul 08 2021 10:30am
Forum: EBike Troubleshooting
Topic: Help with 2wd please, front motor shudders
Replies: 51
Views: 1037

Re: Help with 2wd please, front motor shudders

Frustrating issue for sure, especially now that you've confirms the issue still persists when bypassing the CA with one throttle for each controller. Do you have the same issue if you swap throttles?
by pwd
Jul 02 2021 7:46am
Forum: EBike Troubleshooting
Topic: Weird Motor/Brake Sensor Issue on BBSHD
Replies: 12
Views: 312

Re: Weird Motor/Brake Sensor Issue on BBSHD

Perhaps there is moisture in the main connector that may be causing the issue. Even re-connecting everything may help. You can try replicating the problem by having the bike on the stand (wheel off the ground) and moving the wire harness with the motor engaged and see if it cuts out.
by pwd
Jun 30 2021 10:15am
Forum: EBike Technical
Topic: Fans for active controller cooling
Replies: 7
Views: 288

Re: Fans for active controller cooling

FYI, you can easily find 48V etc... fans on Aliexpress. I'm using a small one on my bike to blow on the hub-sinks. It would be better if the controller was in open air, that is what they are made for except for the fact the the cable harness isn't weatherproof. You can always add some silicone or li...
by pwd
Jun 30 2021 9:54am
Forum: Motor Technology
Topic: Motor theory? Size/rpm, wattage.
Replies: 14
Views: 454

Re: Motor theory? Size/rpm, wattage.

Some excellent explanations here: https://ebikes.ca/learn/power-ratings.html
by pwd
Jun 27 2021 1:49pm
Forum: EBike Build Threads
Topic: PWD's Rocky Mountain Blizzard - mid drive
Replies: 45
Views: 6250

Re: PWD's Rocky Mountain Blizzard - mid drive

The bike and 21S pack have been working out well. Finally got a proper voltage charger. The brand is "Yarlan" from Aliexpress. I'm not an electrical engineer but the build quality is noticeably better than the YZPower charger I had been using. I was able to easily adjust the end voltage up...
by pwd
Jun 27 2021 8:57am
Forum: Bike Mechanical & Structural
Topic: Mid-drive using bb as jackshaft w one-way bearing?
Replies: 6
Views: 272

Re: Mid-drive using bb as jackshaft w one-way bearing?

Can you clarify what you are looking for? If it is a crank freewheel with two chainrings you are looking for I'm using one of these HD freewheels: http://sickbikeparts.com/front-freewheel-heavy-duty/ and "Cyclone" crank arms from the same site. For the chainrings, I'm using something like ...
by pwd
Jun 26 2021 8:18pm
Forum: EBike Technical
Topic: Please help me understand this
Replies: 6
Views: 219

Re: Please help me understand this

Also, you should adjust the rpm/v (under advanced) instead of the throttle to give a better comparison; Care to elaborate ? Throttle is physically adjustable; rpm /v is fixed for a given winding. My thought is that when comparing two motors with different magnet widths and/or different diameters; k...
by pwd
Jun 26 2021 8:32am
Forum: EBike Technical
Topic: Please help me understand this
Replies: 6
Views: 219

Re: Please help me understand this

I think what you are seeing is that the extra copper in the RH212 is almost perfectly making up for the extra poles/diameter in the BionX. Also, you should adjust the rpm/v (under advanced) instead of the throttle to give a better comparison; although in this case they are almost the same rpm/v.
by pwd
Jun 26 2021 8:10am
Forum: Bike Mechanical & Structural
Topic: Will this bike work for a 16KW build?
Replies: 88
Views: 1214

Re: Will this bike work for a 16KW build?

That kona bear dee lux ^^ looks like a better candidate than your original but does it really have a 150mm drop out width?
by pwd
Jun 24 2021 7:12am
Forum: EBike Non-hub Motor Drives
Topic: Off Road Battery Size recommendation for BBSHD
Replies: 95
Views: 2043

Re: Off Road Battery Size recommendation for BBSHD

Good example above ^^ So IMO it's unnecessary to add foam unless you really want the extra insurance against direct impact. Shark packs don't have foam, power tool batteries don't have foam, and as far I'm aware, even Tesla packs don't have any... In addition to impact and vibration resistance; I'm ...
by pwd
Jun 23 2021 12:47pm
Forum: EBike Non-hub Motor Drives
Topic: Off Road Battery Size recommendation for BBSHD
Replies: 95
Views: 2043

Re: Off Road Battery Size recommendation for BBSHD

In my experience: the battery pack should be as securely mounted as possible; especially off-road so that it doesn't shift around while riding over obstacles. If you must use a frame bag; make sure the battery is padded on the top, sides, front and back with foam etc.. the bottom should be padded wi...
by pwd
Jun 23 2021 7:17am
Forum: Bike Mechanical & Structural
Topic: Will this bike work for a 16KW build?
Replies: 88
Views: 1214

Re: Will this bike work for a 16KW build?

Not much room for a pack capable of 16kw peak unless you go under the down tube. What is the dropout spacing on the rear? A qs 273 50H motor will probably need at least 150mm spacing.
by pwd
Jun 21 2021 10:57am
Forum: EBike Troubleshooting
Topic: Ebike Controller help needed! (Baserunner)
Replies: 4
Views: 144

Re: Ebike Controller help needed! (Baserunner)

Did you check all the connection to make sure the connectors are fully seated etc...?
by pwd
Jun 17 2021 7:29am
Forum: Forum Rules and Features
Topic: Move to XenForo software
Replies: 57
Views: 2702

Re: Move to XenForo software

Nice, that preview looks pretty good to me and seems compact enough for a desktop display etc... Glad to here it doesn't need as much CSS work. I'm sure it is using much newer HTML standards too. Thanks for the screenshots.
by pwd
Jun 16 2021 12:02pm
Forum: EBike Technical
Topic: Which advice to follow???
Replies: 10
Views: 379

Re: Which advice to follow???

If you are rebuilding/building a pack with (nickle, copper etc...) strips, I'd probably do the series connections first since those connections will carry the full pack current. In my case, I ended up using nickle sheet, so the series and parallel connection is all one piece.