Search found 65 matches

by stan.distortion
Jun 17 2019 9:20am
Forum: Battery Technology
Topic: Automotive spot welder as battery welder?
Replies: 7
Views: 434

Automotive spot welder as battery welder?

Anyone know it a variable output industrial/automotive spot welder is suitable for battery terminal welding? I've a decent quality unit here that works well on very thin steel sheet but can't find any info using this type of unit for battery terminal welding. I've plenty of dead cells to try it out ...
by stan.distortion
Jun 16 2019 6:05am
Forum: E-Bike Non-hub Motor Drives
Topic: My RC Mid Drive with Single Stage Reduction
Replies: 302
Views: 23249

Re: My RC Mid Drive with Single Stage Reduction

Fixvid - I was kinda hoping someone would raise the subject of drill planetry's. My new Hitachi battery drill is very compact and light (Hikoki in some markets) and has a whopping 130NM of torque with a speed of 0-500 rpm. The torque is very real, as a fencing contractor I run 65mm (2 1/2") self fe...
by stan.distortion
Jun 16 2019 5:07am
Forum: E-Bike Non-hub Motor Drives
Topic: My RC Mid Drive with Single Stage Reduction
Replies: 302
Views: 23249

Re: My RC Mid Drive with Single Stage Reduction

One of the skateboard belt drive reduction kits would probably be a good option for low weight primary reduction, attach the sprocket in place of the skate wheel and most of the work is done (idler bearings + shaft, motor mount with slots for belt tensioning). Alternatively there are plenty of belt ...
by stan.distortion
Jun 14 2019 6:02pm
Forum: Items for Sale - New
Topic: KMX Trike Front Suspension
Replies: 199
Views: 29656

Re: KMX Trike Front Suspension

... The wire spoked bicycle wheel itself is about as spindly and antiquated as it gets. But do the math and it's still hard to beat. Something that always amazed me with that, kevlar (or similar) is hardly ever seen on spokes and it works out ridiculously strong. The invention of wire ropes almost ...
by stan.distortion
Jun 14 2019 5:10pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Build Options
Replies: 14
Views: 900

Re: Build Options

Just thinking that $250 for 72v/35AH pretty cheap to test out the configuration. if all runs well enough then adding the li battery later will feel more deserved. Spending close to $1,000 for lithium batteries then feeling disappointed with the bike overall would have wasted another $750 on top. I'...
by stan.distortion
Jun 14 2019 3:56pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Build Options
Replies: 14
Views: 900

Re: Build Options

Yeah, when the thirst for horsepower and the creeping feature creature get together things are sure to get expensive fast! Hadn't come across those Kunray motors, if they're known to be durable then they look like a very good option :) RC motors appear to give more power/price on paper but their con...
by stan.distortion
Jun 14 2019 1:43pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Build Options
Replies: 14
Views: 900

Re: Build Options

Funny, I bought it from Mike who was the owner of Fat City mopeds for decades. the 50cc engine is "not working" but Im not sure what you mean about gutting and adding a drive shaft Stripping out absolutely everything from the engine/gearbox unit except for the output shaft (ie. the one with the spr...
by stan.distortion
Jun 14 2019 1:00pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Build Options
Replies: 14
Views: 900

Re: Build Options

Lol, I was about to say that's a really clean bike and it's almost a shame to take it apart... then I noticed the year in the photo :) If you can get access to basic fabrication gear then it shoulddn't be much problem to get a 120 section in that swinging arm. It'll look a bit strange but a bigger s...
by stan.distortion
Jun 14 2019 12:29pm
Forum: Battery Technology
Topic: Build a mini USV/UPS
Replies: 42
Views: 1471

Re: Build a mini USV/UPS

john61ct wrote:
Jun 14 2019 12:26pm
1.5A rating
They can be run in paralel or there are higher output alternatives, I've some 5 amp 5v ones buried around here somewhere but can't remember the numbers atm, will have a look and edit if I can dig them out.
by stan.distortion
Jun 14 2019 12:25pm
Forum: Battery Technology
Topic: Build a mini USV/UPS
Replies: 42
Views: 1471

Re: Build a mini USV/UPS

If you're not too far in already maybe go up to 4s and drop back down to 12v with an LM7812:
https://datasheet.octopart.com/LM7812-I ... 981488.pdf

Cheap and extremely reliable, shouldn't be any problem finding ready made boards.
by stan.distortion
Jun 13 2019 3:09pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 730
Views: 33789

Re: APL's DIY axial-flux motor

That thing looks the business, congrats :) What's the issue with cutting the plates? Read through from about page 11 but don't recall seeing anything. For the windings, could you energise each phase with a couple of volts and check the magnetic polarity at each core?
by stan.distortion
Jun 13 2019 9:05am
Forum: E-Bike Technical
Topic: Help,911 ...was riding in the rain and
Replies: 8
Views: 401

Re: Help,911 ...was riding in the rain and

I'm not familiar with the motor so can only offer a little. Is there any kind of regular stuttering, like it's powering for a few degrees of rotation, then not powering, then powering etc? If not then it's probably ok electrically, easy enough to test with a multimeter if you have one. If you try to...
by stan.distortion
Jun 13 2019 8:12am
Forum: Items for Sale - New
Topic: KMX Trike Front Suspension
Replies: 199
Views: 29656

Re: KMX Trike Front Suspension

+1 to sliding pillar, simple, light weight, Morgans tend to suffer from stiction but MTB fork legs and and bushes as kingpins should more or less do away with that problem. Damping would be difficult though, add an external shock and most of the advantages (simplicity, light weight) are lost, MTB fo...
by stan.distortion
Jun 13 2019 7:08am
Forum: Battery Technology
Topic: One Handed Electrode Holder for Spot Welder or RSU
Replies: 16
Views: 2694

Re: One Handed Electrode Holder for Spot Welder or RSU

Sorry for digging up an old thread (it was linked in a sticky, list of battery building threads), does tungsten work ok? From TIG welding experience I would have thought it would be much more prone to sticking than copper. TIG electrodes are a cheap source of tungsten rod btw, usually welding suppli...
by stan.distortion
Jun 12 2019 1:21pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 390
Views: 62102

Re: VESC controller: Check Axiom datasheet!

OMG, huge thumbs up! My jaw dropped at the first post and I was at least 3 pages through before it closed again, you're genuinely going to change the world with what you're doing here :bigthumb: Why oh why didn't I come across this a couple of years back when I was looking into EV drives? (or this f...