Endless Sphere

I can quote having laminated plates cut, either waterjet or machined. No $200 "your material" fee. Shoot me a pm if you end up needing it done.

Somaloy has decent machinability, but is very prone to cracking. You have to be very careful with it or it'll just fall apart. Super cool stuff, though.

Did anyone notice they took rough renders of the AM Racing (Cascadia) motors for their video?

Is this a legitimate 10kW motor in an ebike application? I'm looking for a replacement 100mm motor for my race mini moto.

Back to top for this one. I pulled apart a motor and measured lams...Not good at 0.5mm, sadly. I was spinning it today at no load and noticed some significant heating despite only 4A no load at 7krpm. I did not measure the rate of heating at, say, the 4600rpm it is rated for. I had intended to reter...

Let's just say I had some laying around...It wasn't my preference to use it, but it had been sitting awhile and I had a deadline. Box outer dimensions not including mounting feet are 7.63" x 3.56" x 2.80" to the top of the fins. The length could have fairly easily been reduced by 0.5" and I have som...

Wow! Superb work on that case. Think about the hours of work drawing, programming, and machining... You're not going to get this beauty splashed with mud under the bike, aren't you? :lol: Thanks! I do this stuff literally every day for my business, so it didn't take just too long. Total time with h...

Now that's what I'm talking about! Looks great!

I originally planned to 3d print a lower case out of petg, but had a terrible print and I had some down time today when some parts for the rest of my mini bike didn't show up. I ended up machining the lower case and making some significant changes to end up with the board on top as I originally plan...

And a little preview of what's to come, finished this guy tonight:

On the bottom of the PCB, on the left (so with the temperature sensor on the right), there is a line going from the battery voltage to the two resistors that feed the battery voltage to the processor board. I would put a switch in this line... I'm torn on this one. What I really want is 3-step proc...

Looking great, Kiwi!


Minimum, PM me with some more info if you would, please.

Came across the MP154 series motors last night and despite clearly overrated specs, it is an interesting motor due to some packaging constraints I have. Curious to see if anyone has experience with them. https://frchobby.en.alibaba.com/product/60534101909-811433165/MP_15470_35KW_Outrunner_brushless_...

flat tire wrote: ↑

May 24 2019 2:34pm

3T with ported housing from the davinci dude

Interesting. I wasn't aware that there ended up being more than the first two. Well at least we know there are three! Thanks for responding.

Astros are usually 8 poles / 4 pole pairs. They have that info on their site. Mine is 8 poles / 4 pole pairs. Continuous wattage thru an astro enters the territory of unbelievable but they need active cooling. Water cooling the case is supposed to be best. Yes the BAC2000 will spin in excess of 10K...

Thank you for the link, but it seems to be dead.

Thanks for the offer on the brain boards! If we do end up needing one, just shoot me an invoice on paypal and I'll take care of it immediately.

flat tire wrote: ↑

May 23 2019 7:55pm

BAC2000 sees my astro 3230 (yes) inductance / resistance as 10 uh / mohms respectively. It can spin that thing really, really fast.

3230? I thought there were only 2? I have one and last I heard, the other wasn't for sale.

Hmm. How much would you say could be shaven off this motor to make it shorter ? There is only so much space left between bike cranks. Also how would you go about machining another rotor? Seems a lot of trouble for little gain. I'll have to disassemble and measure, but will get back to you on that. ...

Ubercool, thanks a lot. Copper fill seems not bad at all. On the other hand, it looks like a pretty tight fit. No chance to trim the 124mm version of this motor to around 100mm. Well, that settles it. The rotor seems rather long but tiny. Smaller dia. than the bbshd. Only 6 poles. That explains the...

Interesting feedback. Do you happen to have some pictures ? 7500RPM is alot though :shock: I'd need to halve it at least to get something useful. That's why I was talking WYE/Delta hack or rewind; not to get more power per weight, but better efficiency at 14s and a medium reduction. Currently looki...

Running one of these on a Razor kid's toy operating at 60V nominal and around 150-160 phase amps and around 120 battery amps. Cheap, relatively heavy, but not bad! We've beat and beat on it and gotten it quite hot (boiling water) with no noticeable degradation to the enamel. I am pretty sure it can ...

No trouble, thank you for all you've done already!

I've contacted Lebowski, but haven't heard back, yet. Kiwi, if you want a shot at it, I'm happy to send your way. I think we'll have to get Lebowski involved somehow, since it'll need a new dspic, but no need to have him do it all.

Ya, good luck. I never got anywhere with that bike. I did use the controller on a mid drive and it magically worked with 20 under "Flux Weakening Level." It was inconsistent in where it came on, though.

That is odd, powering the 5V rail directly would not under normal circumstances cause the magic smoke to escape. If Whereswally606 can't help you can send to me, replacing the DSPIC is not a big deal but I suspect there will be some other debugging required. Thanks sir! I'll keep that in mind. I di...

The first thing you need to do is verify you have +5V going to the brain and +15V going to the fet drivers. No +15V or +5V, both on the power board and powering pin 14 (Edit: This was also a mistake?) with 35V and using pin 21, 17, or 9 as ground. EDIT: Bad, bad, bad news bears. I've apparently kil...