So, who's hiding a project?

[sockman]

working on my new trike...more like setting it up to take the beating first...

 

[j3tch1u]

thanks for the interest kfong (btw, excellent work with the drop-in dewalt bms interface). i will definitely go into more detail on my shop toys. i'm new to cnc and i still have a lot to learn (and lots more mistakes to make) but i would strongly encourage anyone serious about their ebike hobby to pick up the skill. kfong, do you make your own pcb's?

how's the quality on the allelectronics gears? d-cut input types are the easiest to use (turn the shaft down and mill a flat). however, torque rating is lower than the splined or serrated types. after i find a shop to make custom broached shafts i'll be moving over to the heavy-duty series. let me know how those gears hold up to the hxt.

i'm trying different frame designs to integrate the batteries. considered PSI, a123 26650's, turnigy 6s2p packs and now probably going to design around the a123 15ah prismatics (thanks cell-man and luke for all the incredible testing).

i don't want to hijack this thread any further so i've started a build thread (thanks matt for lighting the fire).

http://endless-sphere.com/forums/viewtopic.php?f=28&t=15233

-ben

 

[kfong]

Thanks j3tch1u, yes I make my own boards. I've been doing it professionally for years. It's easy for me to create a board. I've lost count of the number of boards I've done for myself and for work. The design gets sent to a board house. If you are referring to boards done on my CNC, I have done that as well but only if it's a one off item or a prototype I'm not sure of. There are limitations, and for SMT stuff a laser printer can be used instead. But I would rather send it out if it gets that fine. The gears look ok, they seem strong enough. Here are close ups of them. I look forward in following your progress in the new thread.

 

[GGoodrum]

I've been busy working on the next generation BMS unit with Richard, and that effort has pretty much consumed every spare minute of time I have. I haven't had time to ride much either, and I can't use "winter" as an excuse (it will be in the 80s here again today... ). I have been trying to catch up, and see what all the nuts here are up to. :lol: Eventually, what I'd like to do is an update to the 3220 setup, once the #219 big sprocket/drive sprocket task gets sorted out. I also am keen to see how the SRAM DD with Luke's splined ENOs do, which is another possibility I might look at.

My biggest problem with my current setup is still not being able to use a 3220 with a sensored 100A/100V controller. I don't have time to pester Bob about doing sesors, which he clearly doesn't want to do, especially with a big group order for sensorless versions. There's just not enough incentive for him to finish the effort. Eventually, CC will have a higher voltage version, I guess, or maybe someone with clever skills will figure out a very simple, bolt-on sensor mod for the existing motors, so when I have time to get back to this hopefully there will be a suitable solution.

-- Gary

 

[John in CR]

Actually, working rough numbers, a 5" ducted fan like that could be in the 50kw continous cooling range. lol I think I could safely go a little smaller, but that wouldn't be my style.

These 5" ducted fans running at a few KW make leaf blowers seem like toys.

Regarding those wanting to use ducted fans, I question their ability to come close to those rates of flow with the significant flow resistance we have. I have a ducted fan ventilating the guest house, and the slight resistance due to the install causes a major reduction in flow.

 

[rkosiorek]

those gears look almost identical to the ones used in the original Currie/USPD Pro-drive. even the input double-D shaft and output spline shaft look the same. were these bought as spares for the Currie?

rick.

 

[kfong]

Bought to be used as a gear reduction for my RC build.

those gears look almost identical to the ones used in the original Currie/USPD Pro-drive. even the input double-D shaft and output spline shaft look the same. were these bought as spares for the Currie?

rick.

 

[magudaman]

I've been working endlessly on my recent project still in the works. Instead of posting I was spending every minute working on it, things have since slowed as I wait for more batteries:

I have 36x 10ah Headways headed my way with a new controller for 48v 70a, with hopes to eventually push to 150 amps at 48v. Pack will be assembled into 16s2p 48v20ah. Ton of fun so far!

Full thread posted over here, I think I made it before we had this non-hub motor thread:

http://www.endless-sphere.com/forums/viewtopic.php?f=6&t=3365

 

[AussieJester]

Thats one of the most 'out there' chain setups i have ever seen on any bike magudaman! Great to see a full suspension non-hub motor setup too....

KiM

 

[Lyen]

Oh my god! I sense that somebody is building something for Skynet behind the scence. LOL

Anyway, this is the planetary setup on my current commuter for up to 34mph only.

 

[flyinmonkie]

Just another excuse here, sorry. Been crazy busy with a new business and the holiday period is my busiest time. Nothing like 10 to 12 hour days and 6 day weeks to cut down the build time.

Anyway, I'm sorting a few small bits and bobs on the chopper and debating a geared hub for it. That would mean a drive train rebuild, but it may need it anyway. I also have plans for an RC MTB build and am very very slowly collecting parts. Nothing yet to post, but I need a geared bike where I have moved to and want a MTB configuration. When I get tot he point of needing suggestions on parts, I'll start a thread.

I promised video of the chopper and have some, so I guess I need to bite the bullet and post on youtube. I thought I could get away with out ever posting on it, but then I found E-S. I'll try to get it up this week.

FM

 

[kfong]

Thanks for the pics lyen, at least now I know how Currie implemented the gear layout and it gives me a better idea on where the support bearings should be.

 

[rkosiorek]

Bought to be used as a gear reduction for my RC build.

those gears look almost identical to the ones used in the original Currie/USPD Pro-drive. even the input double-D shaft and output spline shaft look the same. were these bought as spares for the Currie?

rick.

i was more interested in the source. where did you buy the planetary gears?

rick

 

[kfong]

Allelectronics.com, that info was posted already.

 

[vanilla ice]

On that $10 planetary, I wonder if its possible to weld to that splined piece without screwing it up...

 

[12p3phPMDC]

The cheaper planetaries are made of sintered steel material for the
gears, planet carrier housings and rings.

Edit: I don't know how weldable sintered stuff is.

The more expensive Matex modules are definitely made with steel components for everything including the planet carriers, which is typically
the output. These would be suitable for welding for sure, but they are not $10. More like $70 or somewhere in that range.

 

[Lyen]

Thanks for the pics lyen, at least now I know how Currie implemented the gear layout and it gives me a better idea on where the support bearings should be.

Kfong, you are welcome. I have actually learned a lot from you on the Dewalt A123 BMS battery interface solution & circuit boards in the past. As for the Currie implementation. I have got two other version on my two other ebikes. Would you like to see it? I think dealing with gears & sprockets are more fun & challenging than hub motors. :

 

[kfong]

Yeah, it can only help the cause. I'm sure others can get value from the pics. I get most of my ideas from reading and looking at stuff on this forum.

 

[rkosiorek]

Thanks for the pics lyen, at least now I know how Currie implemented the gear layout and it gives me a better idea on where the support bearings should be.

Kfong, you are welcome. I have actually learned a lot from you on the Dewalt A123 BMS battery interface solution & circuit boards in the past. As for the Currie implementation. I have got two other version on my two other ebikes. Would you like to see it? I think dealing with gears & sprockets are more fun & challenging than hub motors. :

i second kfong's request. please post some pictures. i have a couple of those reduction units that i have long thought of using in something.

rick

 

[katou]

Just biding my time...

I have to wait for batteries to build up a supply from used toolpacks. Sad, but true. I will see what I get enough of, right now I'm just grabbing every lithium toolpack battery I can get my hands on. I have about 12 right now.

Promised to build the family a cabinet for dvd's and such, that is taking most of my time right now. Meanwhile, a 9c rear lies idle, and somewhere, talented hands build my Astro 8150...


Katou

 

[amberwolf]

I think dealing with gears & sprockets are more fun & challenging than hub motors. :

Well, challenging, anyway.

I needed a break from beating my head against the wall trying to figure out how to do the power transfer from the motors to the wheels on ARTOO, since I want to be able to shift into at least a high and a low gear, so I spent a couple hours and fixed up one of the junk bikes I got a couple of days ago. Now it's a fairly nice ride, for a pedal-only.

http://endless-sphere.com/forums/viewtopic.php?f=2&t=12500&p=227037#p227037

I stopped in the middle of the ride for food, and sat there another couple of hours pondering possible drive systems. No post for that yet, but it'll go in the ARTOO thread later tonite once I draw them up in Sketchup.

 

[Lyen]

Thanks for the pics lyen, at least now I know how Currie implemented the gear layout and it gives me a better idea on where the support bearings should be.

Kfong, you are welcome. I have actually learned a lot from you on the Dewalt A123 BMS battery interface solution & circuit boards in the past. As for the Currie implementation. I have got two other version on my two other ebikes. Would you like to see it? I think dealing with gears & sprockets are more fun & challenging than hub motors. :

i second kfong's request. please post some pictures. i have a couple of those reduction units that i have long thought of using in something.

rick

Okay okay, here we go for more planetary drives & other "gears":

 

[Thud]

Deecanio wrote:

have something very intersting to show you thud on this very subject
watch this thread closely today!!!

Still waiting...........(breathlessly, I might add)



Anticipation is killing me.

 

[nsasch]

Yes, I'm hiding a project, but that's because there's nothing to share yet. My spec is 65-70mph on 6% grade, reliability, and 200 mile range.
I've finished basic calculations, assuming a decent drag coefficient for side-by-side seating of 2 people, and it seems possible.

I'm waiting for good gearing and some funding. I also can't figure out how to charge 50-100 kW-h of batteries on my current house wiring, in 8 hours or less. The nearest 600V+ line is miles from my house. For now, I'm just designing it in CATIA. A good suspension system is not easy to design!

 

[deecanio]

Deecanio wrote:

have something very intersting to show you thud on this very subject
watch this thread closely today!!!

Still waiting...........(breathlessly, I might add)



Anticipation is killing me.

am chasing the updated pics, won't be long, and worth the wait too :wink:


D