Search found 2693 matches

by Thud
Oct 11, 2017 10:51 am
Forum: Motor Technology
Topic: Burnt motor when setting my VESC controller
Replies: 9
Views: 228

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 8:09 am
Forum: General Discussion
Topic: Where's the pedals?
Replies: 9
Views: 419

Re: Where's the pedals?

you can't get that thing in 3rd gear in that room...... :P
by Thud
Nov 07, 2016 7:48 pm
Forum: E-Bike Non-hub Motor Drives
Topic: Design for high powered freewheel sprocket for e-bikes
Replies: 30
Views: 1543

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 9:55 pm
Forum: E-Bike Non-hub Motor Drives
Topic: Design for high powered freewheel sprocket for e-bikes
Replies: 30
Views: 1543

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 5:18 pm
Forum: Motor Technology
Topic: Racing and efficiency
Replies: 98
Views: 7852

Re: Racing and efficiency

For lack of a better place to post this:

by Thud
Sep 30, 2016 3:54 am
Forum: General Discussion
Topic: Spinningmagnets 3Dprinter project-build log
Replies: 22
Views: 1988

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 6:23 am
Forum: E-Bike General Discussion
Topic: Holy Exploding Tires Batman!
Replies: 16
Views: 538

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 8:34 am
Forum: Items for Sale - New
Topic: Vedder Anti-Spark switches. Extras for sale.
Replies: 23
Views: 5790

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 2:46 pm
Forum: E-Bike Non-hub Motor Drives
Topic: Light weight full suspension mountainbike --WITH VIDEO--
Replies: 93
Views: 10600

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 8:51 pm
Forum: Motor Technology
Topic: Racing and efficiency
Replies: 98
Views: 7852

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 6:59 pm
Forum: E-Bike Non-hub Motor Drives
Topic: BMX left hand drive
Replies: 13
Views: 706

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 5:03 pm
Forum: E-Bike Non-hub Motor Drives
Topic: BMX left hand drive
Replies: 13
Views: 706

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 2:18 pm
Forum: Motor Technology
Topic: Racing and efficiency
Replies: 98
Views: 7852

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 5:06 am
Forum: E-Bike Non-hub Motor Drives
Topic: 2 speed gearbox/jackshaft
Replies: 18
Views: 950

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 4:56 am
Forum: Motor Technology
Topic: Racing and efficiency
Replies: 98
Views: 7852

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 11:38 am
Forum: Motor Technology
Topic: Racing and efficiency
Replies: 98
Views: 7852

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 4:45 pm
Forum: General Discussion
Topic: Spinningmagnets 3Dprinter project-build log
Replies: 22
Views: 1988

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 5:39 am
Forum: General Discussion
Topic: Spinningmagnets 3Dprinter project-build log
Replies: 22
Views: 1988

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 12:10 pm
Forum: General Discussion
Topic: Spinningmagnets 3Dprinter project-build log
Replies: 22
Views: 1988

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 11:02 am
Forum: Motor Technology
Topic: Stupid Me
Replies: 5
Views: 288

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...
by Thud
Apr 04, 2016 4:53 am
Forum: Motor Technology
Topic: What do u think of this potting
Replies: 4
Views: 308

Re: What do u think of this potting

Have you already committed to using it? (those motors look potted) #1) I don't see a need for fully potting motor windings. this commits your cooling to conduction more so than normal convection. it may be negating any benefits from increasing air-flow through the motors. #2) for a correct full enca...
by Thud
Mar 31, 2016 2:22 pm
Forum: General Discussion
Topic: Spinningmagnets 3Dprinter project-build log
Replies: 22
Views: 1988

Re: Spinningmagnets 3Dprinter project-build log

The kit is 100% complete....the instructions come on a 8g sd card. all the wires, zip ties, wire looming. the whole caboodle as it were. I can't fault the service I got from the vendor during my learning curve...Sunny always responded to every e-mail & re sent me some files that were corrupted on th...
by Thud
Mar 31, 2016 12:04 am
Forum: General Discussion
Topic: Spinningmagnets 3Dprinter project-build log
Replies: 22
Views: 1988

Re: Spinningmagnets 3Dprinter project-build log

Well It took a couple of steps backwards to unlearn a couple things. But we finally have a fully functioning printer now! learning the different config files guys have written & seeing how the code works...I finally cleared enough grey matter to get the settings turned on & off, & reversed in the co...
by Thud
Mar 18, 2016 10:36 pm
Forum: E-Bike Non-hub Motor Drives
Topic: New 80-100 130kv + simple 2-stage reduction
Replies: 12
Views: 5497

Re: New 80-100 130kv + simple 2-stage reduction

Yes, a little, I have a new bike I am adapting this too & since this is a prototype I am still flushing out the fine details....like making the higher wear parts replaceable/serviceable. the bike:Mongoose 26" bmx I picked up for 100 bones... dirt jumper.jpg the re-layed out pattern for the side plat...