Search found 158 matches

by stan.distortion
Oct 22 2020 2:34pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1277
Views: 115151

Re: APL's DIY axial-flux motor

With the CNC you've got 2 options, get into the computer engineering side of it or pay someone else to do it. At the very least it means getting familiar with Gcode or paying through the nose. Gcode is what's used to run (most) CNC machines and it's not all that bad to get to grips with, it's ancien...
by stan.distortion
Oct 22 2020 8:27am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1277
Views: 115151

Re: APL's DIY axial-flux motor

Maybe get a 3d printer before looking into the water jet stuff, they're not as simple as they seem but the motion control stuff from a printer would carry over. Tbh I'd look into a plasma cutter table before water jet, nothing like as potentially accurate but still very useful and has many of the sa...
by stan.distortion
Oct 21 2020 4:07am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: KTM 200 exc goes electric
Replies: 152
Views: 20803

Re: KTM 200 exc goes electric

I've not seen this come up much but sudden speed changes may be causing problems for the controller, it might not be able to respond quickly enough to them and is getting overloaded as a result. Maybe it's something that can be addressed in settings but it's possibly also causing some shaft breakage...
by stan.distortion
Oct 07 2020 4:55am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1277
Views: 115151

Re: APL's DIY axial-flux motor

At a guess the picture is only showing a field winding, the coil windings aren't shown on the individual poles. I'd be curious how that looks in FEMM, it looks like there's something ingenious with variable field strength going on there but I'm not sure how. I'm assuming each magnet in a ring are th...
by stan.distortion
Oct 06 2020 5:06pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1277
Views: 115151

Re: APL's DIY axial-flux motor

..... For the spacer between the core, they need to be ferromagnetic otherwise your increasing reluctance ! Keep up the good work ! :bigthumb: Does the plate need to be non-ferromagnetic?? Late here so maybe I'm missing something obvious but wouldn't it just be back iron for the coils if it was ste...
by stan.distortion
Sep 30 2020 7:07am
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 575
Views: 75111

Re: QS 3000w midmotor

Play will certainly be the main cause but width wont be helping much either. Most (almost all) sprockets available for that spline are the same width as the teeth, some have a bossed centre for wider splines but they're few and far between. It's a weak point and I'd ordered a tapered shaft motor to ...
by stan.distortion
Sep 29 2020 8:18am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1277
Views: 115151

Re: APL's DIY axial-flux motor

Just a note on the backiron, too little inertia could cause major controller problems, I'd expect blowups from frequent sudden speed changes. Too much obviously isn't good either, unnecessary weight and sluggish acceleration, there's a happy medium in there somewhere but I'd er on the heavy side to ...
by stan.distortion
Sep 18 2020 6:19am
Forum: General Discussion
Topic: Bitcoins
Replies: 289
Views: 52425

Re: Bitcoins

Mining is only worth getting into with dedicated hardware (ASICs), big operations ran 10s of millions of dollars worth of GPUs and that hardware is still out there, the latest cutting edge hardware will give an advantage but only 10x at most. That said, the key point with mining isn't what hardware,...
by stan.distortion
Sep 11 2020 4:12am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1277
Views: 115151

Re: APL's DIY axial-flux motor

I was wondering something similar, if your poll configuration is causing it. I'd have thought the forces would balance out, that if the field was repelling on the left then it would be repelling with equal force on the right and the same for attraction but is there any possibility that's not the cas...
by stan.distortion
Sep 01 2020 9:00am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1277
Views: 115151

Re: APL's DIY axial-flux motor

Congrats on the first spin! :) Would moulding something from fibreglass fibre and resin work? 3d printing is really good for mould making, a simple shell would probably be enough but waxes and water soluble filaments are available and apparently some are very easy to print. Fibreglass seems like pre...
by stan.distortion
Jul 21 2020 4:28pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1277
Views: 115151

Re: APL's DIY axial-flux motor

Fibreglass... for something quick and dirty could you pot one side, maybe a paper ring around the inside and outside diameters and another around each coil so they can still be removed and pour in resin? Not nice but it should add a lot of stiffness. Was wondering if webs could be run between the co...
by stan.distortion
Jul 21 2020 2:32am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1277
Views: 115151

Re: APL's DIY axial-flux motor

Can you post a cross section diagram of the centre piece and core carrier? It looks like you could get a couple of dished reinforcing plates in there to limit the flex, might be tricky with all the connections but maybe easier than making a whole new carrier. Sorry to hear it's having issues, I'd ha...
by stan.distortion
Jun 15 2020 5:38am
Forum: General Discussion
Topic: Bitcoins
Replies: 289
Views: 52425

Re: Bitcoins

That's making profit, not money creation. Once upon a time money was backed by precious metal, if a country added to its gold reserves it could create more money but those days are long gone. Here's how it works today, a bank approves a loan and enters the amount into their accounts. Boom, they just...
by stan.distortion
Jun 14 2020 9:29am
Forum: General Discussion
Topic: Bitcoins
Replies: 289
Views: 52425

Re: Bitcoins

Like markz said, it doesn't make sense. Or, to look at it another way, it only makes sense to a fool. The whole currency market requires a suspension of belief in reality. You're supposed to trust complete strangers with the value of your funds? Sure, the stock market works in a similar way, but th...
by stan.distortion
May 24 2020 4:58am
Forum: General Discussion
Topic: Bitcoins
Replies: 289
Views: 52425

Re: Bitcoins

I hear bitcoin is very popular in Venezuela so I think it is more like entity's forcing people on to their monetary system and cryptocurrency's popularity is a function of distrust in those governments. Trust in fiat currency is just big brother telling you what to believe when you think about it. ...
by stan.distortion
Apr 25 2020 7:28am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1277
Views: 115151

Re: APL's DIY axial-flux motor

Looking really good! Congrats :)
by stan.distortion
Apr 25 2020 7:28am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Honda z50j, first EV build
Replies: 11
Views: 770

Re: Honda z50j, first EV build

You're familiar with the Denzel units? Bolt in replacement for the Honda unit and seems to give pretty good performance. A build thread from someone using one here:
viewtopic.php?f=12&t=99606
by stan.distortion
Apr 25 2020 7:20am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Denzel 72v 4-spd Gearbox Build 125cc Dual Sport
Replies: 107
Views: 13201

Re: Denzel 72v 4-spd Gearbox Build 125cc Dual Sport

It might work well if you could figure out a way to shift electronically. Something like a big solenoid or RC motor attached to the shifter and a button on the handlebars. Add an arduino and you could even do full automatic gearchange going that route :twisted: A linkage salvaged from a sportsbike ...
by stan.distortion
Apr 17 2020 4:55am
Forum: Motor Technology
Topic: BESC - beefed up VESC motor controller for high power ebikes
Replies: 159
Views: 31151

Re: BESC - beefed up VESC motor controller for high power ebikes

Hi, great project! I'm really impressed in general with the amount of development work by the community that has gone into the VESC Project, without expectation of a return on investment - very refreshing :-) I am developing a high efficiency & high torque density motor for lightweight electric car...
by stan.distortion
Apr 12 2020 4:49am
Forum: Motor Technology
Topic: DIY IPM rotor?
Replies: 3
Views: 332

Re: DIY IPM rotor?

Total pain for a DIYer to machine and balance the rotor. Not impossible though, way more work than surface mount but the rpm range gains from field weakening would make it worth while.
by stan.distortion
Mar 31 2020 4:46am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1277
Views: 115151

Re: APL's DIY axial-flux motor

Yeah, toothed stators are usually used on stepper motors along with a toothed rotor to gain stall (holding) torque, usually at the cost of rpm.
by stan.distortion
Mar 27 2020 9:17am
Forum: E-Scooter and Motorcycle General Discussion
Topic: New conversion project for Piaggio Zip 50
Replies: 21
Views: 2705

Re: New conversion project for Piaggio Zip 50

Have you checked the swinging arm kits from QS? It looks like you'd need a lot of engineered parts to mount the 138 70H on your existing swinging arm. http://www.cnqsmotor.com/en/article_read/QSMOTOR%203000W%205000W%20138%2070H%20electric%20motorbike%20mid%20drive%20motor%20for%20electric%20motorcyc...
by stan.distortion
Mar 19 2020 5:58am
Forum: E-Vehicles General Discussion
Topic: Regen controller for E-Start on ICE
Replies: 5
Views: 743

Re: Regen controller for E-Start on ICE

A starter from a similar model would be by far the simplest option, even if none are available a flywheel to match the crankshaft taper with the gear/sprocket and sprag clutch should be possible as manufacturers tend to use the same taper across the range. Failing that it's possible to use the flywh...
by stan.distortion
Mar 15 2020 7:17am
Forum: General Discussion
Topic: Bitcoins
Replies: 289
Views: 52425

Re: Bitcoins

The Crypto coins have massively dropped over the last few days, ironically they are touted as the safe haven, but traditional gold has done far better only dropping single digit %, while major cryptos lost around 50% over the last week. I am not really a crypto coin enthusiast, the only thing I am ...
by stan.distortion
Mar 12 2020 6:29am
Forum: E-Bike Build Threads / Photos & Video
Topic: Death Trike (Its Vintage!)
Replies: 11
Views: 1733

Re: Death Trike (Its Vintage!)

goatman wrote:
Feb 21 2020 11:00pm
a person gets hammered, builds a 3000watt death trike with no brakes. makes one post, then???
never to be heard from again.
Send that man more beer! ;)