Search found 2616 matches

by Thud
Feb 13 2018 11:51am
Forum: E-Bike Non-hub Motor Drives
Topic: Custom 80100 RC Drive on Genesis Swing-arm
Replies: 22
Views: 2243

Re: Custom 80100 RC Drive on Genesis Swing-arm

yes, physically (into the direction your spinning the rotor). Easyest done with external hall set up. For internal placement, I started using "between the phase prs" for positioning & payed attention to rotation to have the advance going in the correct/desired direction. (if my math was right, this ...
by Thud
Feb 13 2018 9:20am
Forum: E-Bike Non-hub Motor Drives
Topic: Custom 80100 RC Drive on Genesis Swing-arm
Replies: 22
Views: 2243

Re: Custom 80100 RC Drive on Genesis Swing-arm

Dan, In my experience, my best overall setting for hall timing was between 3 & 5 degree's advanced from lowest amp draw unloaded. you will get some stutters at the extream load (starting from a dead stop) but this should wake the motor up from 1/3 speed to the top. Idealy these motors are producing ...
by Thud
Jan 08 2018 9:08am
Forum: E-Bike Non-hub Motor Drives
Topic: Fitting freewheels to splined freehub drivers
Replies: 639
Views: 57424

Re: Fitting freewheels to splined freehub drivers

These might be old news but seem like the answer to this challenge. Description says they fit on shimano splines. whoa....those are free wheelers. sweet, but: " Will you please let me know if this freewheel is compatible ( fits)with the shimano freehub if not , what hub is this freewheel compatible...
by Thud
Jan 04 2018 11:54am
Forum: E-Bike Non-hub Motor Drives
Topic: Another 2-speed dogbox
Replies: 8
Views: 1170

Re: Another 2-speed dogbox

That's some lovely modeling. free advice: You may want to add some "cush" to your design to help absorb the load spikes to the system. Are you thinking of a grease packed primary reduction? small gears are great for light loads, but do the math when scaling them to bicycle/light moped applications. ...
by Thud
Oct 11 2017 10:51am
Forum: Motor Technology
Topic: Burnt motor when setting my VESC controller
Replies: 9
Views: 677

Re: Burnt motor when setting my VESC controller

From a casual glance, I suspect the winding on that stator tooth as defective. or was damaged. Q?-has that motor ever run on any other controllers for a period of time? In an over-current event, I would expect to see more discoloring of all the windings involved. (that would be the adjacent tooth & ...
by Thud
Jun 20 2017 8:09am
Forum: General Discussion
Topic: Where's the pedals?
Replies: 9
Views: 794

Re: Where's the pedals?

you can't get that thing in 3rd gear in that room...... :P
by Thud
Nov 07 2016 7:48pm
Forum: E-Bike Non-hub Motor Drives
Topic: Design for high powered freewheel sprocket for e-bikes
Replies: 30
Views: 2075

Re: Design for high powered freewheel sprocket for e-bikes

I am with recumpence on this one also, BMX chain is tough...& the 418 heavy duty (still bicycle) chain is tougher yet if you have any concerns. #35 is great if you need finer gearing choices, is less expensive than "premium" grade bicycle products, but you will be fabbing more "special" parts to imp...
by Thud
Nov 06 2016 9:55pm
Forum: E-Bike Non-hub Motor Drives
Topic: Design for high powered freewheel sprocket for e-bikes
Replies: 30
Views: 2075

Re: Design for high powered freewheel sprocket for e-bikes

Highly regarded....lol, (thanks) I could/should have been more clear, putting a freewheel on the driven end of the reduction introduces quite a bit of "play" in the drive set up... if you put the freewheel on the driving sprocket you will reduce the hammering on the pawls. & this is where a sprag wo...
by Thud
Oct 06 2016 5:18pm
Forum: Motor Technology
Topic: Racing and efficiency
Replies: 98
Views: 11002

Re: Racing and efficiency

For lack of a better place to post this:

by Thud
Sep 30 2016 3:54am
Forum: General Discussion
Topic: Spinningmagnets 3Dprinter project-build log
Replies: 22
Views: 2385

Re: Spinningmagnets 3Dprinter project-build log

Hey Amberwolf,
Havent made time to play with the wax filliment yet. Busy season at work has me tied down 50+ hours a week.

I'll make a point of looking for something to print & cast (prolly something simple LIke a ring) & post it up.
by Thud
Aug 21 2016 6:23am
Forum: E-Bike General Discussion
Topic: Holy Exploding Tires Batman!
Replies: 16
Views: 700

Re: Holy Exploding Tires Batman!

If that's a Skyway Wheel, they have limitations to max pressure.
My 20" wheels have came with a sticker 60# max
my older 24"s have it molded into the rim.
by Thud
Aug 17 2016 8:34am
Forum: Items for Sale - New
Topic: Vedder Anti-Spark switches. Extras for sale.
Replies: 23
Views: 8163

Re: Vedder Anti-Spark switches. Extras for sale.

Also - I plan on donating 1/2 of any profit to Vedder - this is his work, not mine. I'd like a few bucks for my time and shipping materials. I expect i'll get $5-10 maximum each (split w/ Vedder) which i hope to put into a reflow oven. I have about 20 extras. I've already donated 50 euro to Vedder ...
by Thud
Aug 06 2016 2:46pm
Forum: E-Bike Non-hub Motor Drives
Topic: Light weight full suspension mountainbike --WITH VIDEO--
Replies: 94
Views: 13847

Re: Light weight full suspension mountainbike build (finally

Gorgeous as always Matt....but you need to take 5 minutes & program your camera.....or is it really Jan. 6th 2003?.
:mrgreen:
by Thud
Jun 16 2016 8:51pm
Forum: Motor Technology
Topic: Racing and efficiency
Replies: 98
Views: 11002

Re: Racing and efficiency

I didn't know where to put this interview with the Alta creators....& some good footage of the bike in action...I still say it needs to lose 50#s but its looking better every time i see it in action.
by Thud
Jun 16 2016 6:59pm
Forum: E-Bike Non-hub Motor Drives
Topic: BMX left hand drive
Replies: 13
Views: 1037

Re: BMX left hand drive

you could blow torch it off.... :twisted:

but its a option for gluing on an adapter on threads that are not favorable to left side drive.
by Thud
Jun 16 2016 5:03pm
Forum: E-Bike Non-hub Motor Drives
Topic: BMX left hand drive
Replies: 13
Views: 1037

Re: BMX left hand drive

metal re-enforced epoxy...
look at dp-460
http://www.ebay.com/sch/i.html?_from=R4 ... 0&_sacat=0
by Thud
Jun 13 2016 2:18pm
Forum: Motor Technology
Topic: Racing and efficiency
Replies: 98
Views: 11002

Re: Racing and efficiency

Another perfect example of no one reading the op..... Does any one here think the KTM in that video is anything other than weak sauce? (or remotely competitive with a modern 4-stroke 250cc ice on a real course?) You can spout off about single speed all day & be right.....but no one can produce a lis...
by Thud
Jun 11 2016 5:06am
Forum: E-Bike Non-hub Motor Drives
Topic: 2 speed gearbox/jackshaft
Replies: 19
Views: 1942

Re: 2 speed gearbox/jackshaft

Its lovely.
I am curious about the ratio spread.(current design & the min/max potentials)
also looking forward to some section & cut-away renderings.

thanks Miles.
by Thud
Jun 11 2016 4:56am
Forum: Motor Technology
Topic: Racing and efficiency
Replies: 98
Views: 11002

Re: Racing and efficiency

on topic: JLdp1Kz0naI E-motocross is coming.....There is some incredible urban motocross potential if we could stifle the noise a good race bike makes. the KTM in this video is so close to being there (except in price)...not a frail bicycle conversion.....but really, still no match for a 12 year old...
by Thud
Jun 09 2016 11:38am
Forum: Motor Technology
Topic: Racing and efficiency
Replies: 98
Views: 11002

Re: Racing and efficiency

Moto, You are trying to mix oil & water.... I went to a national motocross recently (Hangtown) and I noticed that every rider is revving there engines getting every ounce of acceleration out of their bikes. revving does not make acceleration in of itself....they are only revving the motor to get it ...
by Thud
May 04 2016 4:45pm
Forum: General Discussion
Topic: Spinningmagnets 3Dprinter project-build log
Replies: 22
Views: 2385

Re: Spinningmagnets 3Dprinter project-build log

whooo whoo
My wax filament delivered today....time to figure out a strategy to keep the slippery stuff on the build table.

I am thinking a coat of pva followed with a spritz of 3M77....stay tuned.

for anyone looking for printing wax....
http://www.machinablewax.com/product.php?product=52
by Thud
May 01 2016 5:39am
Forum: General Discussion
Topic: Spinningmagnets 3Dprinter project-build log
Replies: 22
Views: 2385

Re: Spinningmagnets 3Dprinter project-build log

Thanks for the compliments & input. I've continued to challenge myself & am getting more comfortable designing printable parts. I commute about 45 miles to work every day...last fall they paved a really nice bike trail I can access for the last 15 miles of the journey. it goes through some really da...
by Thud
Apr 16 2016 12:10pm
Forum: General Discussion
Topic: Spinningmagnets 3Dprinter project-build log
Replies: 22
Views: 2385

Re: Spinningmagnets 3Dprinter project-build log

Well its been a couple weeks of learning & goofing around with settings, but I am getting pretty confident with the set-up & operation of this little machine. here are some pictures of more parts for no good reason: SAM_0298.JPG There you see a set of parts to build another PI3 form scratch...a coup...
by Thud
Apr 08 2016 11:02am
Forum: Motor Technology
Topic: Stupid Me
Replies: 5
Views: 415

Re: Stupid Me

Hey Kim, Your WAY ahead of the general populous in terms of basic understanding. I am certain there is clear & definable math in the many text's Miles has linked to over the years (I confess I have only skimmed the on-line versions of the few that are online) regarding the geometry & then the electr...