Search found 180 matches

by Joe Perez
Sep 20 2013 10:21am
Forum: E-Bike General Discussion
Topic: e-Joe Epik: Any experiences?
Replies: 11
Views: 2969

Re: e-Joe Epik: Any experiences?

Many NYC eBike shoppers find NYCeWheels. $3k kit Brompton, really? Yup, see for yourself: http://www.nycewheels.com/brompton-electric-bike.html $2,795 for the basic bike with the electrical system, plus an additional $180 for the required battery bag. A few dollars shy of $3k even, and I'm not even...
by Joe Perez
Sep 20 2013 8:13am
Forum: E-Bike General Discussion
Topic: e-Joe Epik: Any experiences?
Replies: 11
Views: 2969

Re: e-Joe Epik: Any experiences?

No rush, I'm headed back to SD this weekend but will be back for a couple week stretch midweek. You working a day gig? I'm on B'way show schedule but simple enough to meet in Manhattan during the day or ??? For the first time in as long as I can remember, I find myself in the unusual position of ha...
by Joe Perez
Sep 20 2013 7:18am
Forum: Battery Technology
Topic: Are you using fuse in battery harness? What type?
Replies: 21
Views: 2667

Re: Are you using fuse in battery harness? What type?

Your values seems really low/conservative - There are a number of different ways to spec current limits for cabling, and stranded v. solid actually doesn't have anything to do with it. The AWG ratings for stranded vs. solid make the two equivalent in terms of cross-sectional conductor area. Dependi...
by Joe Perez
Sep 19 2013 9:59pm
Forum: E-Bike General Discussion
Topic: e-Joe Epik: Any experiences?
Replies: 11
Views: 2969

Re: e-Joe Epik: Any experiences?

Hoboken, eh? We're both a couple Joe's with ties to SD and NYC, LOL... Ha. Small world, innit? How far must you ride to your PATH station? Some guys at work use water taxi to cross the Hudson with their full size bikes? About three blocks. I chose the apartment I'm in partly because of its proximit...
by Joe Perez
Sep 19 2013 9:10pm
Forum: E-Bike General Discussion
Topic: e-Joe Epik: Any experiences?
Replies: 11
Views: 2969

Re: e-Joe Epik: Any experiences?

You'll be pleasantly surprised how nimble 20" bikes handle after riding 26" and above. Feels akin to being a kid on a BMX bike again weaving through lampposts and sign poles and things like that. Yeah, I rode one very briefly on the sidewalk in Brooklyn, and that's a good way of putting it- nimble....
by Joe Perez
Sep 19 2013 12:59pm
Forum: E-Bike General Discussion
Topic: e-Joe Epik: Any experiences?
Replies: 11
Views: 2969

Re: e-Joe Epik: Any experiences?

Hi Joe, I'm at Interbike right now, and e-Joe has a booth here. If I get a chance to test ride it, I'd be happy to post my opinion on the Epik. I'd love to hear your opinions. I did ride one briefly around the block at the shop here in Brooklyn, it felt reasonably well put together, though somewhat...
by Joe Perez
Sep 18 2013 4:38am
Forum: Battery Technology
Topic: Are you using fuse in battery harness? What type?
Replies: 21
Views: 2667

Re: Are you using fuse in battery harness? What type?

So I went and looked through some order history. This is the exact fuseholder which I have on my big bike, which runs 52v at 25A: http://www.parts-express.com/pe/showdetl.cfm?Partnumber=070-675 http://img10.picoodle.com/i59i/thraddax/h8uh_602_u77ts.jpg In it, I am running this exact fuse: http://www...
by Joe Perez
Sep 17 2013 6:58am
Forum: Battery Technology
Topic: Are you using fuse in battery harness? What type?
Replies: 21
Views: 2667

Re: Are you using fuse in battery harness? What type?

I run a 30A automotive blade fuse in mine, pulling 25A continuous. No problems at all. The fuse holder is just one I picked up at Frys Parts Express, nothing fancy.
by Joe Perez
Sep 14 2013 8:34pm
Forum: E-Bike General Discussion
Topic: e-Joe Epik: Any experiences?
Replies: 11
Views: 2969

e-Joe Epik: Any experiences?

So, after three wonderful years of e-bike ownership in San Diego, I have recently taken a job in New York City (Manhattan), and gotten an apartment in Hoboken, NJ, just across the Hudson river. This presents me with a challenge. My current bike is an absolutely fabulous performer, built with a cell-...
by Joe Perez
Apr 15 2013 4:22pm
Forum: E-Bike Technical
Topic: BMC Hub Motor - customer support - stripped threads
Replies: 61
Views: 9794

Re: BMC Hub Motor - customer support - stripped threads

JP- Very tidy repair. Thanks for posting the tale with all the photos. Thanks. One thing I should point out is that I did things a bit differently from tkollen's original setup, and wanted to reinforce the reason why. Here is a shot from the original set of images tkollen posted: http://endless-sph...
by Joe Perez
Apr 14 2013 3:43pm
Forum: E-Bike Technical
Topic: BMC Hub Motor - customer support - stripped threads
Replies: 61
Views: 9794

Re: BMC Hub Motor - customer support - stripped threads

So, back in town, got everything re-assembled and running. To re-cap, here is what the axle looks like installed into the frame after I shaved down the torque plate and removed the un-needed second shim from the inside (having shaved the brake caliper mount). I have highlighted in green the area whi...
by Joe Perez
Apr 07 2013 5:57pm
Forum: E-Bike Technical
Topic: how to make a speed limit switch?
Replies: 7
Views: 1916

Re: how to make a speed limit switch?

http://www.methtek.com/2012/07/03/universal-3spd-switch-works-with-any-controller/ That's exactly what I described in post #3 of this thread. It isn't a speed limiter, it's a voltage divider which scales down the throttle, thus limiting power. It's a bit like installing a mechanical stop which prev...
by Joe Perez
Apr 07 2013 3:23pm
Forum: E-Bike Technical
Topic: how to make a speed limit switch?
Replies: 7
Views: 1916

Re: how to make a speed limit switch?

speed Limit ? try to practise control the throttle pushing more or less. Heh. Yeah, that would be my first answer. :) Apart from whatever local laws may govern e-bike speed, I have never understood why anybody would want to install a limit switch on one (outside of extreme applications, where you'r...
by Joe Perez
Apr 06 2013 11:00pm
Forum: E-Bike Technical
Topic: BMC Hub Motor - customer support - stripped threads
Replies: 61
Views: 9794

Re: BMC Hub Motor - customer support - stripped threads

about using a torque wrench with socket on a nut with wires sticking out.. I've seen those crowsfoot sockets. I even own one (I think it's a 13 or 14mm, for one specific bolt on the air-cooled VW Beetle that's impossible to get to otherwise) but I've never trusted them for torquing- they're offset ...
by Joe Perez
Apr 06 2013 8:17pm
Forum: E-Bike Technical
Topic: BMC Hub Motor - customer support - stripped threads
Replies: 61
Views: 9794

Re: BMC Hub Motor - customer support - stripped threads

Thanks. Hopefully it'll all come together as well as I'm envisioning. As it turns out, the nut which comes with these motors also also contributing to the problem. I cut one apart to better illustrate the issue: http://i.imgur.com/2MNVdtv.jpg That area which I have highlighted could contain two more...
by Joe Perez
Apr 06 2013 6:46pm
Forum: E-Bike Technical
Topic: BMC Hub Motor - customer support - stripped threads
Replies: 61
Views: 9794

Re: BMC Hub Motor - customer support - stripped threads

I know for a fact that you are not the first to be bitten by this issue: I had the identical problem torquing down my first BMC and similarly solved it by just picking up a few more threads. I am confident this general strategy will be effective. No kidding. Just for kicks, I dropped in my old moto...
by Joe Perez
Apr 06 2013 12:04pm
Forum: E-Bike Technical
Topic: BMC Hub Motor - customer support - stripped threads
Replies: 61
Views: 9794

Re: BMC Hub Motor - customer support - stripped threads

Ypedal wrote:plan C is a bad one... :lol:
That's why it isn't Plan A. :mrgreen:

I have faith that it would work, I simply don't want to fuse the motor shut.
by Joe Perez
Apr 05 2013 4:09pm
Forum: E-Bike Technical
Topic: BMC Hub Motor - customer support - stripped threads
Replies: 61
Views: 9794

Re: BMC Hub Motor - customer support - stripped threads

when you look at a new motor Haha, what's with this "when" business? I'm far from ready to give up on this unit. dont use a torch... a plain electric heat gun will get it hot enough imo. ( if you opt to remove them ) The only electric heat gun I own is a 250 watt Weller 6966, which I use for heat-s...
by Joe Perez
Apr 05 2013 3:11pm
Forum: E-Bike Technical
Topic: BMC Hub Motor - customer support - stripped threads
Replies: 61
Views: 9794

Re: BMC Hub Motor - customer support - stripped threads

Could you possibly modify the torque plate to turn it into a axle pinching type? That would hold that side of the axle in without relying so heavily on the nut. Were I to do it over again, I might well do that. As it stands, the plate is pretty thoroughly stuck to the frame, such that converting it...
by Joe Perez
Apr 04 2013 8:10pm
Forum: E-Bike Technical
Topic: BMC Hub Motor - customer support - stripped threads
Replies: 61
Views: 9794

Re: BMC Hub Motor - customer support - stripped threads

I gotta say-- that slotted part isn't a thread per se, even though threads are cut into it. Because of the opening, it won't be able to hold normal thread retention forces, even with an insert stuck on it. When real fastener tension is applied, it will scoot out of the insert the same way it escape...
by Joe Perez
Apr 04 2013 3:15pm
Forum: E-Bike Technical
Topic: how to make a speed limit switch?
Replies: 7
Views: 1916

Re: how to make a speed limit switch?

Generally, the speed limit function is a property of the controller, which is selected via an external switch as bowlofsalad describes. The key point is that the switch is merely sending a command to the controller on a dedicated set of wires, and therefore the controller itself must be capable of t...
by Joe Perez
Apr 04 2013 11:28am
Forum: E-Bike Technical
Topic: BMC Hub Motor - customer support - stripped threads
Replies: 61
Views: 9794

Re: BMC Hub Motor - customer support - stripped threads

I just wish I could come up with some way of doing this that doesn't render the motor permanently closed, by preventing the axle from being driven out of the side cover...
by Joe Perez
Apr 03 2013 11:14pm
Forum: E-Bike Technical
Topic: BMC Hub Motor - customer support - stripped threads
Replies: 61
Views: 9794

Re: BMC Hub Motor - customer support - stripped threads

No, something is stripped. Threads don't open up and then just return to normal. Here's a much clearer image of my own axle, so that you can see exactly what is going on: http://img14.picoodle.com/i543/thraddax/bve8_c5d_u77ts.jpg You can see clearly how the end of the axle has deformed inwards such...
by Joe Perez
Apr 03 2013 2:46pm
Forum: E-Bike Technical
Topic: BMC Hub Motor - customer support - stripped threads
Replies: 61
Views: 9794

Re: BMC Hub Motor - customer support - stripped threads

No, something is stripped. Threads don't open up and then just return to normal. Perhaps I didn't adequately explain the specific issue which I have. This is the least-bad image I could find from the web which illustrates the area of concern: http://endless-sphere.com/forums/download/file.php?mode=...
by Joe Perez
Apr 02 2013 3:04pm
Forum: E-Bike Technical
Topic: Is There Any Particular Reason Why The Wires Of A......
Replies: 8
Views: 894

Re: Is There Any Particular Reason Why The Wires Of A......

It's interesting that some find this wire arrangement to be problematic. For me, having all the wires coming out the same end was extremely helpful.

Image

(Ignore the SLAs- that was just a test. The real battery is up in the triangle.)