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  1. #1
    Hrumph! El Duderino X's Avatar
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    2007 Dahon Cadenza w/ Alfine IGH8, reconstituted MEC Desire w/Alfine IGH8 (Handspun Pavement Series II wheelset), Dynamic Crossroad 8, 2 ebikes - Bionx PL350 & 36V eZee FHB mounted on Tidalforce frames.
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    BionX Strain Gauge Sensor

    I've been thinking about the Power In Motion / Its Electric post at Endless Sphere regarding the BionX battery hack ( http://endless-sphere.com/forums/vie...php?f=2&t=7813 ) and some of the other BionX related videos that Power in Motion/Its Electric have posted.
    To that end I ask this question: Does anyone with practical experience on the nuts, bolts and guts of the BionX system think that the strain gauge sensor could be relocated so that the BionX hub could be located on the front wheel of a bike and still utilize the pedal assist feature?
    Jive won't get you no zen!
    - unknown
    [SIGPIC][/SIGPIC]

  2. #2
    Senior Member raevyn's Avatar
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    you can actually purchase the BionX as a front hub as well as a rear. but do to the positioning of the wheel i believe, it makes it more difficult for the petal assist feature, however, I can look into it for you when i go into work this weekend,
    Swing Dancin', Load Haullin' Mama!

  3. #3
    Hrumph! El Duderino X's Avatar
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    Hi Raevyn,

    I've thought about buying a second BionX PL350 (I have one on my Dahon Cadenza and love it) but I don't really want to make that kind of investment without a guarantee that the pedal assist feature will work in a front hub application (something I'm sure won't work).

    Of course the idea of purchasing a new PL350 and installing that on the Cadenza and using the older PL350 as a Guinea pig for a front hub app. has crossed my mind.

    The goal is to construct my ultimate commuter for wet coast travel. Starting with a Dynamic Crossroad 8 shaft drive (Nexus 8 in the rear hub - http://www.dynamicbicycles.com/buy/Bikes.php?prodid=63 ) with a strong and low maintenance pedal assist electric hub motor in the front. Something similar to the Dynamic Runabout pictured here: http://www.poweridestore.com/images/...ssBicycle1.jpg
    http://66.216.110.131/v/vspfiles/pim.../Pages/33.html
    http://www.poweridestore.com/Runabout

    I'd love to get as much build info as possible on the two Runabouts above.

    Alternatively there's the Crystalyte pedal assist sensor.
    http://www.crystalyte.com/elekits%20...sist%20Sensor?
    I believe it was described on the It's Electric site as a fairly finicky application that may not fit/work on many bikes. Definitely need more info on that and whether it could be made to work on a Dynamic bike.

    Shaft drive/internal hub geared with front motor hub and pedal assist. My current commuter fantasy. Whadda ya think?

    Blaine
    Jive won't get you no zen!
    - unknown
    [SIGPIC][/SIGPIC]

  4. #4
    Senior Member 15rms's Avatar
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    I have always liked the idea of putting a bionx on a Schwinn electric bike. The Schwinn is a small geared front hub with adjustable peddle assist. The bionx on back would be a great compliment. A little pricy both combinded however I believe it would be a good long range bike.

    http://www.schwinnelectricbikes.com/Bikes/WorldGSE.aspx

  5. #5
    Senior Member misslexi's Avatar
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    I'm looking at adding a front hub motor to a rear chain drive. Share the battery, two independent throttles. I'd thought about BionX but spendy for a nice-to-have.

    Anyway, chain drives are nice, and efficient, but on the noisy side. Figured the hub would be my stealth mode.

  6. #6
    Senior Member raevyn's Avatar
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    Quote Originally Posted by El Duderino X View Post
    Hi Raevyn,

    I've thought about buying a second BionX PL350 (I have one on my Dahon Cadenza and love it) but I don't really want to make that kind of investment without a guarantee that the pedal assist feature will work in a front hub application (something I'm sure won't work).

    The goal is to construct my ultimate commuter for wet coast travel. Starting with a Dynamic Crossroad 8 shaft drive (Nexus 8 in the rear hub - http://www.dynamicbicycles.com/buy/Bikes.php?prodid=63 ) with a strong and low maintenance pedal assist electric hub motor in the front. Something similar to the Dynamic Runabout pictured here: http://www.poweridestore.com/images/...ssBicycle1.jpg
    http://66.216.110.131/v/vspfiles/pim.../Pages/33.html
    http://www.poweridestore.com/Runabout

    I'd love to get as much build info as possible on the two Runabouts above.

    Alternatively there's the Crystalyte pedal assist sensor.
    http://www.crystalyte.com/elekits%20...sist%20Sensor?
    I believe it was described on the It's Electric site as a fairly finicky application that may not fit/work on many bikes. Definitely need more info on that and whether it could be made to work on a Dynamic bike.

    Shaft drive/internal hub geared with front motor hub and pedal assist. My current commuter fantasy. Whadda ya think?

    Blaine
    I will tell you what Blain, I will get as much info as I can for you. I dont actually work until saturday. as for the crystalyte pedal assist sensor, I am the one who has wired most of them, as well as tested them on our counter top test motor. I still need to do a test on an actual bike, but im waiting for the snow to clear up, as I will need to use one of the store bikes. they do work on the test motor though. as for the BionX, I dont remember exactly what it is about the front motor that makes it less appealing than the rear, so I will definitely look into that for you as well. My boss is sending a few of our staff to meet with bionX, so if i cannot get the info for you this weekend, I will have someone inquire about it for me there. I will be unable to attend it myself, and I have a final exam that morning.
    Swing Dancin', Load Haullin' Mama!

  7. #7
    Hrumph! El Duderino X's Avatar
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    Hi Raevyn,

    That's phenomenal! Thank you so much, I really appreciate the help and the info!
    Its odd that for such a popular system there's so little first hand info to be gleaned from the net regarding Crystalyte's pedal sensor.
    I feel like I'm just that much closer to having the information I need to assemble my low maintenance, (part time) AWD, ubercommuter.

    Rawkin'.
    Jive won't get you no zen!
    - unknown
    [SIGPIC][/SIGPIC]

  8. #8
    Senior Member raevyn's Avatar
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    anytime! I love helping people get what they need! it makes life that much better!
    Swing Dancin', Load Haullin' Mama!

  9. #9
    Senior Member raevyn's Avatar
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    ok! so I am sitting at work, saying to myself "what was I supposed to do today?"

    And then, I REMEMBERED! go me!

    So, for the front motor kit, the sensor wont work unless you have your gears on the front motor as well, because It cant sense the force you are putting in without those gears. so if you buy a front bionX kit, it costs more, and you wont get she sensor gauge feature.

    as for the Crystalyte pedal sensor, it doesnt work exactly the same as the BionX. its kinda like a throttle connected to your pedals, so it doesnt really have that feature that allows you to gauge your speed like the BionX does. you just kinda GO.
    Swing Dancin', Load Haullin' Mama!

  10. #10
    Hrumph! El Duderino X's Avatar
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    Kewl, thanks again Raevyn!

    So I'm guessing that the BionX strain gauge sensor couldn't be adapted into something similar to a crank mounted Crystalyte pedal assist sensor?

    Do you know if there's a controller or switchable override for the Crystalyte pedal assist sensor? Something that would allow a rider to switch on the fly from pedal assist to no assist/throttle assist only?

    My understanding is that Crystalyte is fairly open and modification friendly system. I'm just having a little trouble finding all the info I need to work out a Crystalyte front hub application that would behave and perform as close as possible to my BionX rear hub setup. The Crystalyte website isn't super helpful. Whets my imagination and that's about it.
    Jive won't get you no zen!
    - unknown
    [SIGPIC][/SIGPIC]

  11. #11
    Senior Member raevyn's Avatar
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    I have not heard of a switch like that, nor come accross any made or that purpose. however you might be able to make a conversion cable for one. The pedal sensor for chrystalyte doesnt really feel like the BionX, because it just senses that you are pedaling, but not your actual speed. It is too bad you dont live closer. You could just stop by the store, and I could just show you everything.
    Swing Dancin', Load Haullin' Mama!

  12. #12
    Hrumph! El Duderino X's Avatar
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    Hi Raevyn,

    Looks like the things I have in mind I'll have to leave up to the truly fearless ebike tinkerers and kit manufacturers in our midst. I'm not quite ready to pull apart my BionX hub to see what can and can't be done with/to it's strain gauge sensor.
    True, being out here on the wet coast it might be a bit impractical for me to roll in to Power in Motion but I am located almost directly in between JV Bike and The Renaissance Bike Co. which is a good thing.
    After a late night of careful contemplation I made another checklist of needs and/versus (achievable) wants in an ebike front hub app. and it looks like an Ezee kit might be the way to go. Beat out C.lyte in a couple of categories.

    The pursuit of the all around personally perfect ebike. Sometimes it feels like there aren't enough options, sometimes it feels like there are too many and in the end it turns out that information consumption (too little or too much with a liberal dose of speculation and personal opinion) can be the most limiting factor to overcome.
    Jive won't get you no zen!
    - unknown
    [SIGPIC][/SIGPIC]

  13. #13
    Senior Member raevyn's Avatar
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    oh man, I know exactly how you feel! Try doing it for a day job! I go nuts about everything daily!
    Swing Dancin', Load Haullin' Mama!

  14. #14
    Hrumph! El Duderino X's Avatar
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    It lives.

    My low maintenance, shaft drive, internally eight geared ubercommuter just became electrified. Now I can give the Dahon folder/BionX combo a rest from the daily rigors of urban commuting.

    I pulled the trigger and went the Ezee route. Install went smoothly but I'm too pooped to test ride it after a long day.

    Thanks for yer help, Raevyn. I'll try not to bug you too much, at least until I decide it's time to switch out the BionX to the Cadenza's front forks and ditch the 8 speed and derailleur for an internally geared 8 speed hub.
    Jive won't get you no zen!
    - unknown
    [SIGPIC][/SIGPIC]

  15. #15
    Senior Member raevyn's Avatar
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    I dont mind. It was actually kind of nice to have someone ask my advice.
    Swing Dancin', Load Haullin' Mama!

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