Search found 294 matches

by coleasterling
Mar 10 2021 12:55pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1465
Views: 130088

Re: APL's DIY axial-flux motor

Stepping back just a bit, I want to compliment your CAD skills! You've gone from no modeling at all, to some fairly complex models really quickly!
by coleasterling
Mar 05 2021 3:03pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1465
Views: 130088

Re: APL's DIY axial-flux motor

Man, I was hoping the Ti plate would be the ticket. Bummer on the continued struggles! I'm super interested to see the results from the magnetic circuit tests. I still have nearly 2 full bars of the SMC.
by coleasterling
Feb 09 2021 9:34am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1465
Views: 130088

Re: APL's DIY axial-flux motor

Man, she looks good! Thanks for the thanks, but not necessary! You did all the hard work!
by coleasterling
Feb 02 2021 4:11pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1465
Views: 130088

Re: APL's DIY axial-flux motor

Yep, getting close. My worry at the moment is with the SMC shorting out the fingers. I know we talked about it, and determined that it won't be a problem,.. but it still makes me feel uneasy. :confused: The wiring is relatively simple, with two sets of three coils, and the middle coils reversed. So...
by coleasterling
Jan 29 2021 1:18am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1465
Views: 130088

Re: APL's DIY axial-flux motor

Getting close now!!!
by coleasterling
Jan 24 2021 1:06pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1465
Views: 130088

Re: APL's DIY axial-flux motor

Bummer on the rewinding, but you're doing a fantastic job!
by coleasterling
Jan 18 2021 7:45pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1465
Views: 130088

Re: APL's DIY axial-flux motor

This is like waiting for Christmas presents as a kid. Gotta check the forum like 3 times a day for an update, haha. Good stuff!
by coleasterling
Jan 12 2021 7:14pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1465
Views: 130088

Re: APL's DIY axial-flux motor

I used a slotted cast iron right angle block on the mill table, and turned an aluminum center holder, so I could mount and rotate it vertically. Marked and pre-punched the holes, set the center line with the handle, and then eyeballed the rest. Held my breath a lot. I wound up buying some generic c...
by coleasterling
Jan 11 2021 12:47pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1465
Views: 130088

Re: APL's DIY axial-flux motor

Looks great, sir! How'd you end up holding it for drilling and how'd you index it? Cobalt drills? It saws surprisingly well. We cut A LOT of 3" bar back in the day with a chinese, controlled feed horizontal saw with lenox blades. Then we switched to a fully-automatic Hydmech with a carbide blad...
by coleasterling
Jan 08 2021 3:44pm
Forum: Motor Technology
Topic: My1020 / Kunray / YaLU 1000 - 2000W motor ?
Replies: 77
Views: 12330

Re: My1020 / Kunray / YaLU 1000 - 2000W motor ?

Check earlier in the thread.
by coleasterling
Jan 05 2021 12:10pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1465
Views: 130088

Re: APL's DIY axial-flux motor

Be careful breathing that stuff. Most ceramics aren't too bueno for the lungs. Macor and unfired alumina can be machined fairly well with generic carbide tools. They are too abrasive for HSS in any quantity, but you may not have any issue with as little as you're doing. Just sharpen the tool every s...
by coleasterling
Dec 31 2020 4:57pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1465
Views: 130088

Re: APL's DIY axial-flux motor

When I tried tapping them, they tapped well, but any significant bolt torque split them right in two. The force from the countersunk head may do the same, so that's likely a valid concern. The bending force in the ti plate would be across the strongest section of the cores though, too. I might have ...
by coleasterling
Dec 30 2020 7:00pm
Forum: Items for Sale - Used
Topic: US - E-Grom parts
Replies: 11
Views: 848

Re: US - E-Grom parts

What's the title status?
by coleasterling
Dec 30 2020 4:11pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1465
Views: 130088

Re: APL's DIY axial-flux motor

I was thinking about this more, and wouldn't the cores keep the cut end from moving? They are kinda a large pin, then pinching the plate lightly between the cores should keep it constrained. Maybe you don't need the pins at all?
by coleasterling
Dec 30 2020 2:12am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1465
Views: 130088

Re: APL's DIY axial-flux motor

It depends more on the fit you want, I think. If you want them tight, I'd use a drill, then ream to size. That said, with as shallow of a hole as you're boring, I'd think that you can get away with using a decent carbide EM without having significant chatter. You'd need to make sure that you're not ...
by coleasterling
Dec 23 2020 6:58pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1465
Views: 130088

Re: APL's DIY axial-flux motor

Cutting oil should have been fine too, pending what type. I use "Dark Thread Cutting Oil" sometimes, with high sulfur, typically solid in the pipe threading isle at Home Depot. It is super cheap and works well for most things, though it is not ideal for tapping Ti. The Hocut is only sold i...
by coleasterling
Dec 22 2020 9:03pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1465
Views: 130088

Re: APL's DIY axial-flux motor

Man, I'm super excited about this! The key to drilling is to keep a high feed and absolutely don't let it rub. Go lower in sfm and up the feed if you're burning drills vs. mechanical erosion. If you have a decent coolant, it'll help significantly at high concentrations. I thiiink I have some Hocut l...
by coleasterling
Dec 15 2020 6:53pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1465
Views: 130088

Re: APL's DIY axial-flux motor

Beware the inside edges of the slots, as they are not well-deburred. The outside is also only very lightly done. Could be sharpish!
by coleasterling
Dec 14 2020 3:59pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1465
Views: 130088

Re: APL's DIY axial-flux motor

Shipped out today!
by coleasterling
Dec 04 2020 1:48pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1465
Views: 130088

Re: APL's DIY axial-flux motor

Did you just gave up on the previous motor version you just made? I think it was close to running fine, won't you give a try to a metallic stator plate? He's not done with it, just waiting on me to finish the machining on the Ti plate and get it sent out to him. I just finished a job that was in th...
by coleasterling
Oct 21 2020 7:01pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1465
Views: 130088

Re: APL's DIY axial-flux motor

We have a really good, semi-local waterjet vendor, just lemme know what you want to do.

Tolerances on any waterjet work that's not going to cost WAY too much money are, at best, about 0.010". That's fine for most of the project, but maybe not the core slots.
by coleasterling
Oct 09 2020 2:22pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1465
Views: 130088

Re: APL's DIY axial-flux motor

The whole point of the SMC is that the individual particles aren't conductive, right? I wouldn't think it is necessary?
by coleasterling
Sep 18 2020 11:23pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 484
Views: 118545

Re: Axiom: a 100kW+ motor controller

HighHopes wrote:
Sep 17 2020 9:27pm
i am not aware. my mechanical skillz are near 0.. i am making the first draft as best as i can before it goes to our mech expert for cleanup. feel free to give me more advice :)
Hey, shoot me a PM. I'm happy to help however I can!
by coleasterling
Sep 17 2020 8:48pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 484
Views: 118545

Re: Axiom: a 100kW+ motor controller

designing the enclosure with integrated cooling today. its not ideal because i'm dealing with constraints.. shown below is the bottom where the coolant flows (there will be a waterproof coverplate not shown). the otherside is where the IGBT modules sit, that side will have a flatness spec. this is ...